SW5501 – SW5502
Wireless Serial Server
User Manual
Atop Technologies, Inc.
SW5501 – SW5502
Wireless Serial Server
User Manual
V1.3
February 24th, 2017
V 1.3
SW5501 – SW5502
Wireless Serial Server
User Manual
This PDF Document contains internal hyperlinks for ease of navigation.
For example, click on any item listed in the Table of Contents to go to that page.
General Description
User Guide
Published by:
Atop Technologies, Inc.
2F, No. 146, Sec. 1, Tung-Hsing Rd,
30261 Chupei City,
Hsinchu County
Taiwan, R.O.C.
Tel: +886-3-550-8137
Fax: +886-3-550-8131
sales@atop.com.tw
www.atoponline.com
www.atop.com.tw
V 1.3
SW5501 – SW5502
Wireless Serial Server
User Manual
V 1.3
Important Announcement
The information contained in this document is the property of Atop Technologies, Inc., and is supplied for the sole
purpose of operation and maintenance of Atop Technologies, Inc., products.
No part of this publication is to be used for any other purposes, and it is not to be reproduced, copied, disclosed,
transmitted, stored in a retrieval system, or translated into any human or computer language, in any form, by any
means, in whole or in part, without the prior explicit written consent of Atop Technologies, Inc.,
Offenders will be held liable for damages and prosecution.
All rights, including rights created by patent grant or registration of a utility model or design, are reserved.
Disclaimer
We have checked the contents of this manual for agreement with the hardware and the software described. Since
deviations cannot be precluded entirely, we cannot guarantee full agreement. However, the data in this manual is
reviewed regularly and any necessary corrections will be included in subsequent editions.
Suggestions for improvement are welcome.
All other product’s names referenced herein are registered trademarks of their respective companies.
Documentation Control
Author:
Revision:
Revision History:
Creation Date:
Saowanee Saewong
1.3
Update
23 February 2017
Last Revision Date:
1 March 2017
Product Reference:
SW5501-SW5502
Document Status:
Including new firmware features
SW5501 – SW5502
Wireless Serial Server
User Manual
V 1.3
Table of Contents
Preface ........................................................................................................................9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
Purpose of the Manual ..................................................................................................................... 9
Who Should Use This User Manual ................................................................................................. 9
Supported Platform .......................................................................................................................... 9
Warranty Period ............................................................................................................................... 9
Manufacturers Federal Communication Commission Declaration of Conformity Statement ........... 9
European Community, Switzerland, Norway, Iceland, and Liechtenstein ..................................... 10
UL Notice for Power supplier ......................................................................................................... 11
Introduction ...............................................................................................................12
2
2.1
2.2
3
Product Overview ........................................................................................................................... 12
Features ......................................................................................................................................... 13
Getting Started ..........................................................................................................14
3.1
3.2
3.3
3.4
3.5
3.5.1
3.5.2
3.6
3.7
4
Packing List .................................................................................................................................... 14
Optional Accessories...................................................................................................................... 14
Ordering Information ...................................................................................................................... 15
Appearance: front-power-side panels ............................................................................................ 15
Serial Pin Assignments .................................................................................................................. 17
D-Sub9 (DB9) ................................................................................................................................. 17
Terminal Block (TB5)...................................................................................................................... 18
First time installation....................................................................................................................... 18
Factory Default Settings ................................................................................................................. 19
Configuration and setup ............................................................................................20
4.1
4.2
4.2.1
4.2.2
4.2.3
4.2.4
4.3
4.4
4.4.1
4.4.2
4.4.3
4.5
4.5.1
4.5.2
4.5.3
4.6
4.7
4.8
4.8.1
4.8.2
4.8.3
4.8.4
4.9
4.9.1
4.9.2
4.9.3
4.9.4
Change basic settings with Device Management Utility ................................................................ 20
Advanced configuration via Web Interface .................................................................................... 25
Operation Mode.............................................................................................................................. 27
Overview ........................................................................................................................................ 30
Wireless Status .............................................................................................................................. 31
Site Monitor .................................................................................................................................... 31
Web configuration - Network settings ............................................................................................ 33
Web configuration – Wireless Settings .......................................................................................... 35
Wireless Profiles ............................................................................................................................. 35
Basic Settings ................................................................................................................................. 38
Advanced Settings ......................................................................................................................... 42
Web configuration – Serial ............................................................................................................. 44
COM Port Overview ....................................................................................................................... 44
COM Configuration......................................................................................................................... 45
COM Configuration: Advanced Settings ......................................................................................... 46
Web configuration - SNMP/Alert Settings ...................................................................................... 49
Web configuration - E-mail Settings ............................................................................................... 50
Web configuration - Log Settings ................................................................................................... 52
System Log Settings ...................................................................................................................... 52
COM Log Settings .......................................................................................................................... 53
Event Log ....................................................................................................................................... 54
COM DataLog ................................................................................................................................ 55
Web configuration – System Setup ................................................................................................ 56
Date/Time Settings ......................................................................................................................... 56
Admin Settings ............................................................................................................................... 57
Firmware upgrade .......................................................................................................................... 58
Backup/Restore Settings................................................................................................................ 58
SW5501 – SW5502
Wireless Serial Server
User Manual
V 1.3
4.9.5 Management List ............................................................................................................................ 59
4.9.6 Ping ................................................................................................................................................ 60
4.10
Web configuration – Reboot and Restore to default Settings ........................................................ 61
5
Link modes and Applications.....................................................................................62
5.1
Link Mode Configuration ................................................................................................................ 62
5.1.1 Link Mode: Configure SW550X as a TCP Server .......................................................................... 62
5.1.2 Link Mode: Configure SW550X as a TCP Client ........................................................................... 66
5.1.3 Link Mode: Configure SW550X in UDP ......................................................................................... 68
5.2
Link Mode Applications .................................................................................................................. 71
5.2.1 TCP Server Application: Enable VirtualCOM ................................................................................... 71
5.2.2 TCP Server Application: Enable RFC 2217 through Virtual COM ................................................. 72
5.2.3 TCP Client Application: Enable Virtual COM ................................................................................. 72
5.2.4 TCP Client Application: Enable RFC 2217 through Virtual COM .................................................. 73
5.2.5 TCP Client Application: Configure SW550X as a Pair Connection Master .................................... 73
5.2.6 TCP Client Application: Configure SW550X as a Pair Connection Slave ...................................... 74
5.2.7 TCP Server Application: Enable Reverse Telnet ........................................................................... 74
5.2.8 UDP Application: Multi-Point Pair Connection ............................................................................... 75
5.2.9 TCP Server Application: Multiple TCP Connections ...................................................................... 77
5.2.10 TCP Server Application: Multi-Point TCP Pair Connections .......................................................... 77
5.3
Wireless Topology .......................................................................................................................... 78
5.3.1 Configure SW550X as a Wireless Ad-Hoc Peer ............................................................................ 78
5.3.2 Configure SW550X as a Wireless Client in the Infrastructure mode (PSK) ................................... 80
5.3.3 Click-2-Go ...................................................................................................................................... 82
5.3.4 Configure SW550X as a Wireless Client in the Infrastructure mode (PEAP-MSCHAPv2) ............ 83
6
VCOM installation and troubleshooting .....................................................................84
6.1
6.1.1
6.1.2
6.1.3
6.1.4
6.2
6.2.1
6.2.2
6.2.3
6.3
6.4
6.4.1
6.4.2
6.4.3
6.5
6.5.1
6.5.2
7
Enabling VCOM.............................................................................................................................. 84
VCOM Driver Setup........................................................................................................................ 85
Limitation ........................................................................................................................................ 86
Install .............................................................................................................................................. 86
Uninstall .......................................................................................................................................... 86
Enable VCOM in Serial Device Servers and Select VCOM in Windows ....................................... 87
Enable VCOM in Serial Device Servers ......................................................................................... 87
Running Serial/IP Software Utility in Windows ............................................................................... 87
Configuring VCOM ports ................................................................................................................ 89
Exceptions ...................................................................................................................................... 92
Using Serial/IP Monitor................................................................................................................... 96
Opening the Port Monitor ............................................................................................................... 96
Activity Panel .................................................................................................................................. 96
Trace Panel .................................................................................................................................... 97
Serial/IP Advanced Settings ........................................................................................................... 99
Advanced Settings Options ............................................................................................................ 99
Using Serial/IP with a Proxy Server .............................................................................................. 100
Specifications ..........................................................................................................101
7.1
7.1.1
7.1.2
7.1.3
7.1.4
7.1.5
Hardware Specifications .............................................................................................................. 101
Models of SW550X Series ............................................................................................................ 101
Physical Characteristics ............................................................................................................... 101
LED Indicators .............................................................................................................................. 101
Signal LEDs................................................................................................................................... 102
Dip Switch (SW5501).................................................................................................................... 102
7.1.6
7.1.7
7.1.8
7.1.9
Dip Switch (SW5502) .................................................................................................................... 102
Wireless Specifications ................................................................................................................ 103
Frequency Range: ......................................................................................................................... 103
Data Rate: ..................................................................................................................................... 103
SW5501 – SW5502
Wireless Serial Server
User Manual
V 1.3
7.1.10 Output Power................................................................................................................................ 104
7.1.11 Receiver Sensitivity....................................................................................................................... 104
7.1.12 Security ......................................................................................................................................... 106
7.1.13 Regulatory Requirements ............................................................................................................. 106
7.1.14 Environmental Limits .................................................................................................................... 107
7.1.15 Other............................................................................................................................................. 107
7.2
Software Specifications ................................................................................................................ 107
8
Emergency System Recovery...................................................................................108
9
Warranty ..................................................................................................................109
Table of Figures
Figure 2.1
Figure 3.1
Figure 3.2
Figure 3.3
Figure 3.4
Figure 3.5
Figure 3.6
Figure 3.7
Figure 4.1
Figure 4.2
Figure 4.3
Figure 4.4
An Application of Wireless Serial Device Server in WLAN ....................................................................12
Front Panel of SW5501..........................................................................................................................15
Front Panel of SW5502..........................................................................................................................15
Front Panel of SW5501-TB/Sis ..............................................................................................................16
Front Panel of SW5502-TB/Sis ..............................................................................................................16
Power Panel of all SW550X Series .......................................................................................................16
Rear view of SW550X Series.................................................................................................................17
Din-Rail Mount of SW550X ....................................................................................................................17
User Interface of Device Management© lists a SW550X device in wireless client mode. ....................20
Administrator Login ................................................................................................................................21
Notification in case that the SW550X device is in different subnetwork from your PC ..........................21
Pop-up window indicates a successful login .........................................................................................21
Figure 4.5
Figure 4.6
Figure 4.7
Figure 4.8
Mark of login device in the Caution column ...........................................................................................22
Notification of unsuccessful login when the interface is either down or unreachable...........................22
Pull-down Menu of Configuration and Network… .................................................................................23
Pop-up Windows of Network Setting ......................................................................................................23
Figure 4.9 Authorization for Change.......................................................................................................................24
Figure 4.10 Waiting Notification for Restarting Device ...........................................................................................24
Figure 4.11 Authentication Pop-up Windows ..........................................................................................................25
Figure 4.12 User Interface of Web Configuration ....................................................................................................26
Figure 4.13 Menu-tree of All Available Modes and Options of SW550X Series .......................................................26
Figure 4.14 Configuration Page of Operation Mode with Wireless Client Setting ....................................................27
Figure 4.15 Waiting Message ..................................................................................................................................28
Figure 4.16 Completion of the settings and counting down for a page reload ......................................................28
Figure 4.17 AP Client Operation Mode Setting ........................................................................................................29
Figure 4.18 Overview Information Page of an SW550X Device .............................................................................30
Figure 4.19 Wireless Status page shows current information of SW550X. ............................................................31
Figure 4.20 Transition page during the gathering of surrounding wireless network information. ...........................32
Figure 4.21 Results of a Site Monitoring of SW550X Series. .................................................................................32
Figure 4.22 Network Settings Page (Wireless Client Mode) ...................................................................................33
Figure 4.23 Network Settings Page for Bridged Interface (AP Client Mode) ...........................................................34
Figure 4.24
Figure 4.25
Figure 4.26
Figure 4.27
Enabling Wireless Profile Option to Add New Access Point .................................................................35
Basic Setting List Webpage after Clicking Add Button .........................................................................36
Wireless Profile Page ...........................................................................................................................37
Basic Settings for Wireless Connection when Wireless Profile is Enabled ..........................................38
SW5501 – SW5502
Wireless Serial Server
User Manual
Preface
Figure 4.28 Basic Settings for Wireless Connection when Wireless Profile is Disabled. .......................................39
Figure 4.29 Results of network scanning when uses “scan network” buttons ........................................................41
Figure 4.30 Result when there is no wireless network available in the area. .........................................................41
Figure 4.31 Wireless Advanced Settings Page when Wireless Profile is Disabled and Topology is set to
infrastucture ..............................................................................................................................................................42
Figure 4.32 Wireless Advanced Settings Page when Wireless Profile is Enabled ................................................43
Figure 4.33 COM 1 Port Setting Page ...................................................................................................................44
Figure 4.34 Serial Settings Part of COM Port ........................................................................................................45
Figure 4.35 Advanced COM Port Settings Page ...................................................................................................46
Figure 4.36 SNMP/Alert Settings Page ..................................................................................................................49
Figure 4.37 E-mail Settings Page ..........................................................................................................................51
Figure 4.38 Sending Test E-mail Failed ..................................................................................................................51
Figure 4.39 System Log Settings Page..................................................................................................................52
Figure 4.40 COM Log Settings Page .....................................................................................................................53
Figure 4.41 Event Log Page ..................................................................................................................................54
Figure 4.42 COM Datalog Page .............................................................................................................................55
Figure 4.43 Date/Time Settings Page ....................................................................................................................56
Figure 4.44 Admin Settings Page ..........................................................................................................................57
Figure 4.45 Firmware Upgrade Page .....................................................................................................................58
Figure 4.46 Backup/Restore Setting Page .............................................................................................................59
Figure 4.47 Management List Page .......................................................................................................................59
Figure 4.48 Successful Ping with No Packet Loss .................................................................................................60
Figure 4.49 Unsuccessful Ping with 100% Packet Loss ........................................................................................60
Figure 4.50 Reboot Page .......................................................................................................................................61
Figure 4.51 Pop-up Windows while Rebooting SW550X with Reloading Countdown in Seconds .........................61
Figure 5.1 Link Mode Options for COM 1 Port .......................................................................................................62
Figure 5.2 An Example of TCP Server Link Mode .................................................................................................62
Figure 5.3 Connection Settings for TCP Server Link Mode ...................................................................................63
Figure 5.4 TCP Server Link Mode Settings under COM 1 Page ...........................................................................64
Figure 5.5 An Example of TCP Client Link Mode ..................................................................................................66
Figure 5.6 Connection Settings for TCP Client Link Mode ....................................................................................66
Figure 5.7 TCP Client Link Mode Settings under COM 1 Page .............................................................................67
Figure 5.8 An Example of UDP Link Mode ............................................................................................................68
Figure 5.9 Connection Setting for UDP Link Mode ................................................................................................69
Figure 5.10 UDP Link Mode Settings under COM 1 Page.....................................................................................69
Figure 5.11 Virtual COM Application in TCP Server Link Mode ............................................................................71
Figure 5.12 Virtual COM Application in TCP Client Link Mode ..............................................................................72
Figure 5.13 Pair Connection Master Application in TCP Server Link Mode .........................................................73
Figure 5.14 Pair Connection Slave Application in TCP Client Link Mode .............................................................74
Figure 5.15 Reverse Telnet Application in TCP Server Link Mode ......................................................................75
Figure 5.16 An Example of Network Topology for Multi-Point Pair Connection in UDP Link Mode .....................76
Figure 5.17 Setting of Multiple TCP Connection Application via Maximum Connection Option ...........................77
Figure 5.18 An Example of Network Topology for Multi-Point Pair Connection in TCP Link Mode ......................78
Figure 5.19 Wireless Ad-Hoc Peer Settings for SW550X ....................................................................................79
Figure 5.20 Wireless Client with WPA2-PSK Security Settings for SW550X ......................................................81
Figure 5.21 Wireless Client with PEAP Security Settings for SW550X ...............................................................83
Figure 6.1 Enabled Virtual COM Application in TCP Server Link Mode .................................................................84
Figure 6.2 Enabled Virtual COM Application in TCP Client Link Mode ..................................................................84
Figure 6.3 An Example Diagram of Virtual COM Application over TCP/IP Network ...........................................85
Figure 6.4 Enable Virtual COM Application for COM 2 in TCP Server Link Mode ..............................................87
Figure 6.5 Serial/IP Tray Icon on Windows Notification Area ...............................................................................88
Figure 6.6
A Pop-up Window for Selecting Virtual COM Ports ...........................................................................88
Figure 6.7 Serial/IP Control Panel Window ...........................................................................................................89
Figure 6.8 Configuring Virtual COM 2 Port as TCP Client ...................................................................................90
Figure 6.9 Configuration Wizard Window for COM 1 ...........................................................................................91
Figure 6.10 Timeout Warning on VCOM Connection ..........................................................................................92
SW5501 – SW5502
Wireless Serial Server
Figure 6.11
Figure 6.12
Figure 6.13
Figure 6.14
Figure 6.15
Figure 6.16
Figure 6.17
Figure 6.18
Figure 6.18
User Manual
Preface
Error of Client not licensed for this server .........................................................................................93
Licensing Issue of Serial/IP Utility Software .....................................................................................93
VCOM Authentication failed due to Missing Username/Password ...................................................94
VCOM Authentication failed due to incorrect Username and/or Password ......................................94
VCOM Authentication failed due to disabled VCOM Authentication on SW550X ............................95
Activity Panel of Serial/IP Port Monitor .............................................................................................96
Trace Panel of Serial/IP Port Monitor ...............................................................................................97
Serial/IP Advanced Settings Window ...............................................................................................99
Proxy Server Tab under Serial/IP Advanced Settings ....................................................................100
List of Tables
Table 3.1 Packing List ..............................................................................................................................................14
Table 3.2 Optional Accessories ...............................................................................................................................14
Table 3.3 Device Ordering Information ....................................................................................................................15
Table 3.4 Factory Default Network Settings ............................................................................................................19
Table 3.5 SW550X Series Factory Default Settings ................................................................................................19
Table 4.1 Common Buttons in Web Configuration Menu........................................................................................27
Table 4.2 Default Settings in Infrastructure Mode: ..................................................................................................38
Table 4.3 Default Settings in Ad Hoc Mode: ............................................................................................................38
Table 5.1 An Example of Multi-Point Pair Connection’s Parameter Settings for UDP Link Mode ...........................76
Table 5.2 An Example of Multi-Point Pair Connection’s Parameter Settings for TCP Link Mode ..........................77
Table 5.3 Summary of Parameter Settings for Wireless Ad-Hoc Peer with WEP Security ....................................79
Table 5.4 Summary of Parameter Settings for Wireless Client in Infrastructure Topology with WPA2-PSK
Security ....................................................................................................................................................................82
Table 5.5 Wireless Client-Infrastructure Topology Parameters with WPA2 (PEAP-MSCHAPv2) Security. ...........83
Table 5.5
Table 5.5
Table 5.5
Table 5.5
SW550X series and their interfaces ......................................................................................................101
Physical Characteristics of SW550X Series .........................................................................................101
Descriptions of LED Status Indicators ..................................................................................................101
Interpretation of SW550X’s Operation via Front Panel LEDs ...............................................................102
Table 5.5
Table 5.5
Table 5.5
Table 5.5
Table 5.5
Table 5.5
Table 5.5
Dip Switch Functions of SW5501 ..........................................................................................................102
Dip Switch Function of SW5502 ...........................................................................................................102
Wireless Interface Specification of SW550X Series ............................................................................103
Operating Frequencies in Different Regions at 2.4GHz and 5GHz ......................................................103
Supported Data Rate for Wireless Interface under IEEE 802.11 Standards ........................................103
Maximum Output Power of Wireless Interface under IEEE 802.11Standards .....................................104
Receiver Sensitivity of Wireless Interface under IEEE 802.11 Standards ............................................104
Table 5.5 Conformed Radio Frequency and Electromagnetic Standards ............................................................106
Table 5.5 Conformed Electrical Standards ...........................................................................................................106
Table 5.5 Software Specifications .........................................................................................................................107
SW5501 – SW5502
Wireless Serial Server
User Manual
Preface
1 Preface
Purpose of the Manual
1.1
This manual supports you during the installation and configuration of Atop’s Wireless Serial Device Server
SW5501-SW5502. As such, it contains some advanced network management knowledge, instructions, examples,
guidelines and general theories designed to help users manage this device and its corresponding software. A
background in general theory is necessary when reading it. Please refer to the Glossary for technical terms and
abbreviations (if any).
Who Should Use This User Manual
1.2
This manual is to be used by qualified network personnel or support technicians who are familiar with network
operations. It might be useful for system programmers or network planners as well. This manual also provides
helpful and handy information for first time users. For any related problems, please contact your local distributor.
If they are unable to assist you, please redirect your inquiries to www.atop.com.tw or www.atoponline.com.
Supported Platform
1.3
This manual is designed for the SW550X Industrial Wireless Serial Device Server Series and that model only.
Warranty Period
1.4
Atop provides a 5-year limited warranty for SW550X Industrial Wireless Serial Device Server Series.
Manufacturers Federal Communication Commission Declaration of Conformity
Statement
1.5
Model: SW550X Industrial Wireless Serial Device Server Series
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant
to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which can be determined by turning
the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:

Reorient or relocate the receiving antenna.
SW5501 – SW5502
Wireless Serial Server



User Manual
Preface
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may cause undesired
operation.
This device and its antenna(s) must not be co-located or operating in conjunction with any other antenna or
transmitter except in accordance with FCC multi-transmitter product procedures.
FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could
void the user's authority to operate this equipment. For product available in the USA/Canada market, only channel
1~11 can be operated. Selection of other channels is not possible.
This device is restricted to indoor use when operated in the 5.15 to 5.25 GHz frequency range use.
※ FCC requires this product to be used indoors for the frequency range 5.15 to 5.25 GHz to reduce
the potential for harmful interference to co-channel mobile satellite systems.
FCC Radiation Exposure Statement: This equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20cm
between the radiator and human body.
1.6
European Community, Switzerland, Norway, Iceland, and Liechtenstein
Model: SW550X Industrial Wireless Serial Device Server Series
Declaration of Conformity with regard to the R&TTE Directive 2014/53/EC
This equipment is in compliance with the essential requirements and other relevant provisions of 2014/53/EC.
The following standards were applied:
 EMC : EN 301 489-1 v1.9.2 (2011-09), EN 301 489-17 v2.2.1 (2012-09)
 Radio : 47 CFR FCC Part 15 Subpart C § 15.247, 47 CFR FCC Part 15 Subpart E § 15.407
 EN300 328 v1.8.1 (2012-06), EN301.893 v1.7.1 (2012-06)
 EMF: 47 CFR FCC Pat 2 Subpart J, section 2.1091, EN 62311:2008 and EN50385:2002
 Health & Safety: EN60950-1: 2001; EN 50385: 2002
The conformity assessment procedure referred to in Article 10.4 and Annex III of Directive 2014/53/EC has been
followed.
Note : This equipment is intended to be used in all EU and EFTA countries. Outdoor use may be restricted to certain
frequencies and/or may require a license for operation. For more details, contact Atop Technologies, Inc.
SW5501 – SW5502
Wireless Serial Server
User Manual
Preface
European Union
This system has been evaluated for RF exposure for Humans in reference to the ICNIRP (International Commission
on Non-Ionizing Radiation Protection) limits. The evaluation was based on the EN 50385 Product Standard to
Demonstrate Compliance of Radio Base Stations and Fixed Terminals for Wireless Telecommunications Systems
with basic restrictions or reference levels related to Human Exposure to Radio Frequency Electromagnetic Fields
from 300 MHz to 40 GHz. The minimum separation distance from the antenna to general bystander is 20cm (7.9
inches).
1.7
UL Notice for Power supplier
The SW550X Series products are intended to be supplied by a listed power unit marked with “LPS” (Limited Power
Source), or “Class 2” and output rate of 9~48 VDC, 1.0 Ampere minimum, or use the recommended power supply
listed in Table 3.2 Optional Accessories.
SW5501 – SW5502
Wireless Serial Server
User Manual
Introduction
2 Introduction
2.1
Product Overview
The SW550X Industrial Wireless Serial Device Server is designed to provide wireless connectivity to clients and
serial devices, thus creating a complete solution for your industrial wireless networking. The SW550X series can
be operated as a wireless client with the ability to connect serial device to Wireless Local Area Network (WLAN) or
Local Area Network (LAN) and as AP client to bridge between WLAN and LAN.
The SW550X Series support IEEE 802.11a/b/g/n wireless connectivity standards, which can be operated in both
2.4GHz and 5GHz bands. It acts as a server for serial devices that are connected to its ports in order to transparently
connect to other devices in the wireless network or can be reached by other wireless devices. Supported interfaces
of serial devices include RS-232, RS-422, and RS-485.
As an example, user can connect serial devices to a Wireless Serial Device Server (SW550X) and control them
through Wireless Networking Device such as Wireless Access Point (AW5500) in wireless local area network
(WLAN). An example in Figure 1.1 illustrates how to connect serial devices to a wireless local area network or a
backbone network. The SW550X Industrial Wireless Serial Device Server provides several functionalities to support
mobile and wireless networking.
Figure 2.1 An Application of Wireless Serial Device Server in WLAN
SW5501 – SW5502
Wireless Serial Server
2.2
User Manual
Introduction
Features
SW550X Series’ small size but powerful architecture makes it a perfect choice for industrial/manufacturing needs
in which size is a decisive factor. It rewards our customers with superb connectivity withstanding all the harshness
in your environment of choice.
The key characteristics of SW550X are:

Support of the most popular wireless local area network standards IEEE 802.11a/b/g/n
Support of 5 GHz Industrial, Scientific and Medical (ISM) band operating frequency to reduce interference in
2.4 GHz ISM band with other wireless devices
Certified wireless equipment by FCC (United States), ETSI (Europe), and NCC (Taiwan)



Dual antennas offer better wireless coverage and reduce wireless blind spots
Embedded PCB coating protection
Easy configuration through embedded web server interface or Atop’s Windows®-based configuration utility

program called Device Management®
Firmware upgradable through embedded web server interface or Atop’s Device Management®


Caution
From here on, extreme caution must be exercised.
Never install or work on electrical or cabling during periods of lightning activity. Never connect or
disconnect power when hazardous gases are present.
WARNING: Disconnect the power and allow unit to cool for 5 minutes before touching.
SW5501 – SW5502
Wireless Serial Server
User Manual
Getting Started
3 Getting Started
3.1
Packing List
Inside the purchased package, you will find the following items:
Table 3.1 Packing List
Item
Quantity
SW550X Series
Antenna
1
2
Terminal Block
Documentation
Mounting Kit
1
1
Description
Industrial Wireless Serial Device Server
3~5 dBi antenna
3-pin 5.08mm Lockable Terminal Block (TB3)  1
5-pin 5.08mm Lockable Terminal Block (TB5)  1
(SW5501-TB/SW5501-Sis only)
5-pin 5.08mm Lockable Terminal Block (TB5)  2
(SW5502-TB/SW5502-Sis only)
Hardware Installation Guide (Warranty Card is included)
DIN-Rail Kit (Already mounted on the device)
Note: Please notify your sales representative if any of the above items is missing or damaged in any form upon delivery. If your sales
representative is unable to satisfy your enquiries, please contact us directly.
3.2
Optional Accessories
The following table lists optional accessories for SW550X series.
Table 3.2 Optional Accessories
Item
UN315-1212(US-LDC)
UNE315-1212(EU-LDC)
ADP-DB9(F)-TB5
WMK-454-Black
Description
Y-Type (5.08mm) power adapter, 100-240VAC input, 1.25A @ 12VDC output, US plug
Y-Type (5.08mm) power adapter, 100-240VAC input, 1.25A @ 12VDC output, EU plug
Female DB9 to Female 3.81 TB5 Converter
Black Aluminum Wall Mount Kit
SW5501 – SW5502
Wireless Serial Server
3.3
User Manual
Getting Started
Ordering Information
Please refer to the following product codes to place an order.
Table 3.3 Device Ordering Information
Model Name
SW5501
SW5501-TB
SW5501-Sis
SW5502
SW5502-TB
SW5502-Sis
3.4
P/N
1P1SW550100001G
1P1SW5501TB001G
1P1SW5501SIS01G
1P1SW550200001G
1P1SW5502TB001G
1P1SW5502SIS01G
Description
1-port Industrial Wireless Serial Device Server, DB9
1-port Industrial Wireless Serial Device Server, TB5
1-port Industrial Wireless Serial Device Server, TB5 with serial isolation
2-port Industrial Wireless Serial Device Server, DB9
2-port Industrial Wireless Serial Device Server, TB5
2-port Industrial Wireless Serial Device Server, TB5 with serial isolation
Appearance: front-power-side panels
The front panels of different models of SW550X series are shown in the following figures. Note that the power
panel and the rear panel are the same for all models. Note that the detailed description of LEDs and DIP switch on
the front panel can be found in Chapter 7.1 below.
`
Figure 3.1 Front Panel of SW5501
Figure 3.2 Front Panel of SW5502
SW5501 – SW5502
Wireless Serial Server
User Manual
Figure 3.3 Front Panel of SW5501-TB/Sis
Getting Started
Figure 3.4 Front Panel of SW5502-TB/Sis
Figure 3.5 Power Panel of all SW550X Series
Note: The blue DIP switch on the front panel of SW550X can be used to adjust different values for pull-high or pulllow termination resistors on the RS-485 COM ports. If the RS-485 network range is shorter than 100 meters, the
termination resistors are not required (by setting the DIP switch to termination off). Otherwise, it may be necessary
to insert termination resistors (by setting the DIP switch to termination on) at both ends of RS-485 network to
improve signal quality. Table 7.5 and Table 7.6 summarize the functionalities of the DIP switches for COM1 and
COM2 on their SW550X series.
The rear panel (where you can mount the device on a rail or to the wall) is shown in figure below, together with a
simple mounting instruction.
SW5501 – SW5502
Wireless Serial Server
User Manual
Figure 3.6 Rear view of SW550X Series
Getting Started
Figure 3.7 Din-Rail Mount of SW550X
Serial Pin Assignments
3.5
3.5.1
D-Sub9 (DB9)
Pin#
1
2
3
4
5
6
7
8
9
RS-232
RS-422/4-Wire RS-485
2-Wire RS-485
Full Duplex
Full Duplex
Half Duplex
DCD
RXD
TXD
DTR
SG (Signal Ground)
N/A
TXD+
RXD+
N/A
SG (Signal Ground)
N/A
RXDTXDN/A
N/A
N/A (reserved)
DATA+
N/A
SG (Signal Ground)
N/A
DATAN/A (reserved)
N/A
DSR
RTS
CTS
RI
SW5501 – SW5502
Wireless Serial Server
3.5.2
Getting Started
Terminal Block (TB5)
Pin#
1
2
3
4
5
3.6
User Manual
RS-232
4-W RS-422/RS-485
2-W RS-485
Full Duplex
Full Duplex
Half Duplex
SG
RTS
TxD
CTS
RxD
SG
RR+
TT+
SG
DATADATA+
N/A
N/A
First time installation
Before installing the device, please adhere to all safety procedures described below, Atop will not be held liable
for any damages to property or personal injuries resulting from the installation or overall use of the device. Do not
attempt to manipulate the product in any way if unsure of the steps described here 1, in such cases please
contact your dealer immediately.
1. Prepare the necessary cables, DC adapter, power cord, LAN cable, serial cable, etc; do not connect the unit
yet.
2. Install both antennas to the SMA connectors (gold connectors) in the front panel of SW550X device. Note
that the antenna’s connectors are female reverse-polarity (RP) SMA type. The gains of the antennas are
3dBi at 2.4GHz and 5dBi at 5GHz. Once installed the device to a rail or your desired location, do not put
them parallel otherwise their signal will interfere with each other. Please see the recommended antennas
setup for SW550X in the Hardware Installation Guide.
3. Plug the power source to the unit, starting from the ground (It is a screw close to the power terminal block.)
and then the 3-Pin power terminal block on the power panel in Figure 3.5. A recommended power adapter
(such as US315-1212 power adapter listed in Table 3.2) with 3-Pin terminal block can be connected to the
power terminal block. You will hear a long beep with all LEDs turn on and after a few second you will hear
a shot beep twice and the RUN LED will start blinking slowly. If the device’s wireless interface is working
properly, the WLAN LED will also turn on and start blinking once in a while. Device’s STATUS LEDs will also
start running too from bottom LED to the top LED.
4. Note that although internal grounding has been done inside, in order to ensure overall maximum
performance and protection of your device it is strongly advised to properly connect the grounding. Please
choose only one of the grounding connections either connecting the ground to the screw on the power
panel or to the Frame Ground (F.G.) pin of the 3-Pin terminal block.
5. Place the device in the desired location, which is dry and free from dirt or corrosive vapors, and connect it
to a LAN via an Ethernet cable with an RJ45 connector.
6. Connect your computer to the LAN network. Default configurations will be addressed later in Chapter 3.7
below.
Note1: Please consult your Hardware Installation Guide (leaflet available in your package) for more information when attempting an
installation. Also, please follow all safety procedures when doing so.
SW5501 – SW5502
Wireless Serial Server
3.7
User Manual
Getting Started
Factory Default Settings
Upon arrival, the device is set with factory default settings. The SW550X Series comes with two different IP
addresses for LAN and WLAN as shown below.
Table 3.4 Factory Default Network Settings
Interface
LAN
WLAN
Device IP
10.0.50.100
192.168.1.1
Subnet mask
255.255.0.0
255.255.255.0
Gateway IP
10.0.0.254
192.168.1.254
DNS1
168.95.1.1
Other relevant factory default settings are summarized below.
Table 3.5 SW550X Series Factory Default Settings
Parameter
Default Values
Security
User Name
Password
Serial
Admin
Null (blank)
COM1
COM2
SNMP
SysName of SNMP
SysLocation of SNMP
SysContact of SNMP
SNMP
Read Community
Write Community
SNMP Trap Server
RS-232 (RS-422 for Sis models), 9600 bps, 8 data bits, No Parity bit, 1
stop bit, No Flow Control
Packet Delimiter timer: Auto
0060E9XXXXXX
Location
Contact
Disabled
public
private
0.0.0.0
Note: you can press the “Reset” button on the front panel for 5 seconds to restore the SW550X Series to the
factory default settings.
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
4 Configuration and setup
4.1
Change basic settings with Device Management Utility
Note: Advanced settings are not possible via Device Management Utility. This can be used to locate, access, modify
network parameters, change login credentials or update firmware. For device-specific settings, please use Web
Interface, as described in Chapter 4.2 below.
First, please install our configuration utility program called Device Management Utility (formerly Serial Manager)
that comes with the Product CD or can be downloaded from our websites (www.atop.com.tw or
www.atoponline.com).
For more information on how to install Device Management Utility, please refer to the manual that comes in the
Product CD or that is available online. After you start the utility, SW550X Industrial Wireless Serial Device Server
will be automatically detected if this is already connected to the same subnet as your PC and will be listed on the
Device Management Utility’s window.
Alternatively, if you did not see your SW550X device on your network, press “Rescan” icon (first icon on the icon
bar). A list of devices including your SW550X device currently connected to the network will be shown in the window
of Device Management© as shown in the Figure below.
Important information about the SW550X device such as the IP address, MAC address, etc are going to be displayed
as well. Note that a simple way to configure a new SW550X device is to set a static IP for your personal computer
to the same subnet (i.e. 10.0.50.XXX) as the default IP address of the LAN connection (i.e. 10.0.50.100).
Note: in the Figure below the SW5502 device appears with two lines because it has been set to operate in wireless
client mode as two different IP addresses and MAC addresses are available. If, otherwise, SW5502 is set to operate
in AP client mode, it will show up on the Device Management with only one IP address and MAC address. Details
of operation modes will be presented in Section 4.4 below.
Figure 4.1 User Interface of Device Management© lists a SW550X device in wireless client mode.
After selecting and then double-clicking the device’s name on the list (such as SW5502 with IP address
10.0.50.100), a window will pop-up and prompt you to enter username and password.
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
Note: the default username is “admin” and the password is blank or no password, see Factory Defaults for more
information), then click “Login” button as shown in the figure below.
Figure 4.2 Administrator Login
A pop-up window as shown will notify you if your personal computer and the SW550X device are on different subnetwork. Click “OK” to accept the notification and return to the Device Management’s window. In this case, please
change the IP address of your PC so that it has the same subnet as the SW550X. Then, re-select and double-click
on the device in order to login to the SW550X device again, as described in the previous paragraph.
Figure 4.3 Notification in case that the SW550X device is in different subnetwork from your PC
If successful, another pop-up window will be shown when you can successfully login to the SW550X device. Click
the “OK” button to proceed.
Figure 4.4 Pop-up window indicates a successful login
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
Then there will be a “+” symbol under the Caution column of the login device in Device Management Utility list as
shown in Figure below.
Figure 4.5 Mark of login device in the Caution column
If the device cannot be login, the system will notify you with the notification in Figure 3.6. If this happens, the user
should try to check the reachability between your PC and the SW550X with ‘ping’ command or utility.
Figure 4.6 Notification of unsuccessful login when the interface is either down or unreachable.
After a successful login, the SW550X device can then be accessed and configured through the Device Management
Utility’s interface.
Note: Advanced settings are not possible via Another way of doing this is by selecting the SW550X device and then
choosing the “Config by browser” icon from the forth icon on the icon bar or select “Config by browser” option from
under the pull-down menu Configuration. Please see detail on how to configure the device via web browser in the
next section.
Sometime the SW550X device might not be in the same subnet as your PC; therefore, you will have to use our utility
to locate it in your virtual environment. To configure each device, click the selected SW550X device (default IP:
10.0.50.100) in the list of Device Management©, and click “Configuration  Network…” (or Ctrl+N) menu on
Device Management© as shown in Figure 4.7 or click on the second icon called Network on the menu bar, and a
pop-up window will appear as shown in Figure 4.8.
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
Figure 4.7 Pull-down Menu of Configuration and Network…
Figure 4.8 Pop-up Windows of Network Setting
You may proceed then to change the IP address, Subnet mask, and Gateway, and Host name of SW550X to avoid
any IP address conflict with other hosts on your LAN or to connect the device to your existing LAN as shown in
Figure 3.8. After click “OK” button, the system will prompt you for a credential to authorize the changes. That is it
will ask you for the Username and the Password as shown in Figure 4.9. A pop-up window as shown in Figure 4.10
will prompt the user to wait for the change on the SW550X device.
The device will be restarted without any beep. After the device is restarted, it will beep twice to indicate that the
unit is running normally. Then, the SW550X device can be found on a new IP address. It may be listed automatically
by the Device Management Utility along with its old record or it can be found by clicking on the Rescan icon.
SW5501 – SW5502
Wireless Serial Server
User Manual
Figure 4.9 Authorization for Change
Figure 4.10 Waiting Notification for Restarting Device
Configuration and
setup
SW5501 – SW5502
Wireless Serial Server
4.2
User Manual
Configuration and
setup
Advanced configuration via Web Interface
The SW550X Series’ user interface is designed intuitively for satisfying customers’ ease of use needs.
Every SW550X device is equipped with a built-in web server. It can be accessed by using a web browser for
configuring by entering the device’s IP address (the default IP address is 10.0.50.100) in the URL field of your web
browser. Once the device is connected to the network, it can be configured by using any web browser. An
authentication request will appear as shown below when the user uses a web browser to configure the SW550X
Series. If this is the first login, please enter the default User name as “admin” and leave the Password blank then
click the OK button to login.
Note that you can alternately launch the Web Interface with your default web browser using Device Management
Utility by choosing the “Config by browser” icon from the forth icon on the icon bar or select “Config by browser”
option from under the pull-down menu Configuration
Figure 4.11 Authentication Pop-up Windows
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
An example of web configuration of SW550X Series is shown below.
Figure 4.12 User Interface of Web Configuration
On the left side of the screen, a menu-tree is listed with all available modes and options as shown Figure 4.13. On
the right side of the screen, the contents of each mode/option will be displayed in a graphical format. For more
information on each selection, please refer to each corresponding section throughout this manual.
Figure 4.13 Menu-tree of All Available Modes and Options of SW550X Series
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
There are three common buttons presented in almost every web configuration menu or section as shown below.
Table 4.1 Common Buttons in Web Configuration Menu
Button
Function
Save and apply the current configuration input on the page.
As the caption implies, it applies the current configuration immediately
but it will not save into the device. Until the device is restarted, the device
will return to the old parameters.
Cancel the current configuration input and show the original setting.
4.2.1
Operation Mode
The SW550X Serial Device Server Series has been designed as a Wireless Client with the ability to choose a
connection between Wireless Local Area Network (WLAN) and Local Area Network (LAN). It can also operate as
an AP (access point) client, which will bridge a connection from WLAN to LAN or vice versa. This Operation Mode
page is the welcome screen for the SW550X Series. There are two operation modes to choose from:
1) Wireless Client
2) AP Client.
In Wireless Client mode, SW550X will have two independent network interfaces: LAN and WLAN. Each interface
would have its own IP address; hence, traffic from the LAN interface won’t be transferred to the WLAN interface,
and vice versa.
In the AP Client mode, the LAN and the WLAN interfaces are bridged together to create one single bridged interface
using one IP address. Traffic from either side of the network will be passed onto the other side of the network.
The figure below shows the configuration page for Operation Mode of SW550X. The user can select one of the two
radio buttons inside the Operation Mode box. An image on the right side of the box displays the SW550X as the
blue circle while a remote access point (AP) that provides wireless access is the orange circle.
Figure 4.14 Configuration Page of Operation Mode with Wireless Client Setting
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
After finish configuring the Operation Mode, please click on Save Settings button to keep the change that you have
made and to apply your setting. A pop-up window with a message “Please wait for a while…” will appear as shown
below. When the saving is finished, the pop-up windows will disappear and return to the Operation Mode page.
Figure 4.15 Waiting Message
If you only want to save the settings and restart the device to a selection of Operation Mode, you can click “Apply”
button to apply the setting and reboot the SW550X device. Note that after clicking the “Apply” button, the user will
briefly see the same pop-up window as in above and after a few second another pop-up window will appear as
shown below. Then, you will be redirected back to the Operation Mode page.
Figure 4.16 Completion of the settings and counting down for a page reload
The next figure shows an example of AP Client operation mode setting. Note that the graphic image on the right
side of the box isplays the SW550X as the blue circle with an Ethernet connection to a device denoted with a green
circle. The remote access point (AP) that provides wireless access is still represented by the orange circle.
SW5501 – SW5502
Wireless Serial Server
User Manual
Figure 4.17 AP Client Operation Mode Setting
Configuration and
setup
SW5501 – SW5502
Wireless Serial Server
4.2.2
User Manual
Configuration and
setup
Overview
The “Overview” submenu under the “System Status” menu, displays overall and current general information on the
SW550X device’s status and settings. An example of SW5502’s Overview page is shown below.
Figure 4.18 Overview Information Page of an SW550X Device


Information under the Device Information box displays the Model Name, the Device Name, Kernel Version
and AP Version of the SW550X device. Note that the default Device Name is the MAC address of your device.
The firmware version of your SW550X consists of the Kernel Version and the AP Version.
Information under the Network Information box shows the summary of both LAN and WLAN interfaces. For
LAN interface, there are its MAC address and current IP address. For WLAN interface, there are its MAC
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
Address, the Country code, current IP Address, and the Status of the interface. Note that the Country code
indicates the available radio channels for your WLAN interface while the Status displays current MAC Address
of an access point (AP) that the SW550X associates with and the AP’s link quality in percent.

Information under the COM 1 Information & COM 2 Information boxes report on the current serial connection
setting of both interfaces which are the type of current Serial Interface (RS-232, RS-422, or RS-485), the Link
Mode, the Baud Rate, the Parity bit, the Data bits, the Stop bits, the Flow Control, and the current Link Status.
Note that the Link Status will show the mode of the port such as SERVER MODE and the number inside the
square brackets ([N])) is the number of sessions that are connected in the corresponding COM port. If the
number in the bracket is zero ([0]), it means that the port link is connecting or listening.
4.2.3
Wireless Status
The SW550X’s current wireless network status is displayed in this section called “Wireless Status” submenu under
the “System Status” menu. The current information is summarized below. Please remember to always keep a note
of your preferred setting. The Current Information includes SSID, BSSID (AP MAC), Topology (infrastructure or
other), Band mode, Channel, Encryption, and Status. Note that the Status of current information will be display as
green bar(s) with percentage number to indicate the quality of the wireless link.
Figure 4.19 Wireless Status page shows current information of SW550X.
4.2.4
Site Monitor
Site Monitor submenu under the System Status menu allows users to view other wireless networks in the
neighborhood. It also provides information on other access points (APs) such as SSID, occupied Channel(s), the
RSSI (Received Signal Strength Indicator), Security and other parameters. It can be helpful when setting SSID and
Channel number for your SW550X device to avoid SSID name and Channel number conflict and prevent unexpected
errors or degradation of your wireless network performance. Note that it will take a few second (approximately 10
seconds) for this option to gather information of the surrounding wireless networks. During this process, the web
page will show a “Please wait…” message with running animation as shown below.
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
Figure 4.20 Transition page during the gathering of surrounding wireless network information.
An example of a list of nearby WLAN APs which is reported by the Site Monitor is shown in Below figure.
The available information include the SSID, the Mode of IEEE 802.11 standards (which could be 802.11a, 802.11b,
802.11g, 802.11n, or a combination of standards), the radio Channel number, the Authentication mode (such as
Open, WPA-PSK, WPA2-PSK, WPA2(PEAP), WPA2(EAP-TLS), WPA2(EAP-TTLS)), the Encryption standards (such
as None, WEP, AES or TKIP or a combination of TKIP/AES), the data rate in Mbps, and the quality of the wireless
signal which is reported in Signal%.
The “Refresh” button at the bottom of the page allows user to obtain the latest information from the Site Monitoring
process. Note that when there are two numbers under the Channel column, it means that there are Primary Channel
and Secondary Channel used by that access points.
Figure 4.21 Results of a Site Monitoring of SW550X Series.
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
Web configuration - Network settings
4.3
The SW550X series have the ability to utilize dual connections, i.e., WLAN and LAN at the same time. The user can
configure both LAN and WLAN interfaces in this section. An example of Network Settings page for SW550X in
Wireless Client mode is shown below.
Figure 4.22 Network Settings Page (Wireless Client Mode)
There are four configurable parts under Network Settings which are LAN interface, Wireless LAN interface, Default
Gateway and DNS Server. The first configurable option under the Network Settings is Gratuitous ARP (Address
Resolution Protocol). This option enables SW550X device to periodically send out an ARP response automatically
to notify that SW550X device is in the network. The frequency of transmission is in minutes which can be selected
from the pull-down menu and the period of transmission in the unit of minutes can be set in the followed textbox
as shown.
1) LAN Interface and Manual Settings Part
a. SW550X device can get IP information automatically from a DHCP server in LAN. The user can
check the box in front of the “Obtain an IP Address Automatically” to get the necessary IP
information or enter the IP values manually if known in the Manual Settings section of this part.
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
b. Manual Settings – If the user wants to fix the IP address of LAN interface, the desired IP Address,
Subnet Mask, and Default Gateway should be entered in this section.
2) Wireless LAN Interface Part
a. SW550X device can also get IP information automatically from a DHCP server in WLAN as well.
The user can check the box in front of the “Obtain an IP Address Automatically” to get the IP
information or enter the IP values manually if known in the following fields of this part.
b. IP Settings for WLAN also include the desired IP Address, Subnet Mask, and Default Gateway.
Note that under the Wireless Client mode, LAN and WLAN can be seen separately. They need to be configured into
different subnets. The user must choose which interface that should be the Default Gateway by selecting the
corresponding radio buttons between WLAN and LAN as shown in the screenshot (see next part).
3) Default Gateway Part
Default Gateway Selection specifies either WLAN or LAN interface as the default gateway. The selected
interface is usually the one that is connected to a network gateway or Internet. Settings from one of them
will not be applicable to the other, i.e., if the WLAN is selected over the LAN then IP, Subnet mask, etc., on
the LAN side will be OFF. However, it can be changed to another value not in used and save those
parameters.
Note that under the AP Client mode, you will only see one bridged interface (LAN & WLAN Interface) and the
default gateway selection will be unnecessary (this part will disappear) as shown below.
Figure 4.23 Network Settings Page for Bridged Interface (AP Client Mode)
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
4) DNS Server Part:
To allow your SW550X device to properly connect to the Internet and be able to resolve for a host over
the Internet, you must specify Preferred DNS (Domain Name Server) and (optionally) Alternate DNS in
this part.
After finish configuring the Network Settings, please click on Save & Apply button to keep the change that you
have made and to apply your setting. A pop-up window with a message “Please wait for a while…” will appear
briefly. Then, another pop-up window with message “The settings have been completed” will be displayed. When
the saving and applying are finished, the pop-up window will disappear and the web browser will be redirected to
the Operation Mode page. If you want to cancel the change and reset all changes back to their original values,
just click the Cancel button.
4.4
4.4.1
Web configuration – Wireless Settings
Wireless Profiles
Starting from firmware version V3.XX, each wireless profile can be directly set from the profile webpage. Users no
longer need to set wireless profile through the Basic Setting (see next subsection). When the Wireless Profile is
enabled by checking the Enabled box and clicking Apply button behind the Wireless Profile option, there will be an
Add button under the AP List for adding new wireless profile as shown below.
Figure 4.24 Enabling Wireless Profile Option to Add New Access Point
This will bring up the Basic Settings List webpage as shown in in the next page for entering the necessary
information of each wireless profile. Description of each field can be found in the next subsection. When entering
all necessary information of the wireless profile, click Save button at the bottom. Users are allowed to save up to
ten wireless connection profiles or list of network names or SSIDs (called AP List) inside SW550X. SW550X will
retry each and every enabled profile (network name or SSID) for one minute before continuing to the next profile if
the current profile failed to connect.
You can use the Sort column to adjust the precedence of the profiles. However, this function is disabled by default.
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
Figure 4.25 Basic Setting List Webpage after Clicking Add Button
Figure below shows an example of enabled Wireless Profile in which an AP List consists of ten available entires
for network names or SSIDs. Each entry will have its number (No.) on the list and Name. Color of the Name is used
to indicate the current status of the SSID or profile on the list. When the color of the Name is green, the profile is
connected. When the color of the Name is orange, the profile is connecting. When the color of the Name is grey,
the profile is disable. Under the Modify column, there are two options: Edit and Delete. If the user clicks on Edit,
this will bring up the Basic Setting List webpage. On the other hands, if the user clicks on Delete, this will remove
the profile from the list. The last column in the list is the Sort column which has arrow button(s) to allow changing
the order of the profiles (access points) on the list.
SW5501 – SW5502
Wireless Serial Server
User Manual
Figure 4.26 Wireless Profile Page
Configuration and
setup
SW5501 – SW5502
Wireless Serial Server
4.4.2
User Manual
Configuration and
setup
Basic Settings
To set up a wireless connection for SW550X, a number of parameters are needed to be configured in this section.
However, the user will have two different wireless configuring pages when Wireless Profile (see previous
subsection) is enabled as shown in previous paragraph and when Wireless Profile is disabled as shown in Figure
below. The only differences between the two pages are that when Wireless Profile is enabled, the Basic Settings
webpage will be disabled or cannot be used. When Wireless Profile option is enabled by checking the Enabled box
(see previous paragraph), the following sentence will be displayed in the pop-up window: "Basic Settings can’t be
used, because Profile is enabled" as shown in figure below.
When Wireless Profile is disabled, the Basic Settings webpage can be used. The default settings in Basic Settings
page can be in two Topology modes: Infrastructure Mode or Ad Hoc Mode. The user will have both modes to
choose from. Table 4.2 and Table 4.3 summarized the default settings for Infrastructure mode and Ad Hoc mode,
respectively.
Table 4.2 Default Settings in Infrastructure Mode:
Caption
SSID
BSSID (MAC Address)
Default
Null
Any (unless enabled)
Topology
Band Mode
Channel
Bandwidth1
Secondary Channel
Authentication Mode
Encryption Type
Infrastructure
Automatic Detection
Automatic Detection
Automatic Detection
Automatic Detection
OPEN
NONE
Table 4.3 Default Settings in Ad Hoc Mode:
Caption
Radio Off
SSID
BSSID (MAC Address)
Topology
Band Mode
Channel
Bandwidth1
Secondary Channel
Authentication Mode
Encryption Type
Default
Disabled (box not checked)
Null
Any (unless enabled)
Ad-Hoc
802.11a
36
20 MHz
Disabled
OPEN
NONE
Figure 4.27 Basic Settings for Wireless Connection when Wireless Profile is Enabled
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
Figure 4.28 Basic Settings for Wireless Connection when Wireless Profile is Disabled.
After the user finished setting the Basic Settings as shown above, please click the Save & Apply button to save the
new wireless configuration on the SW550X and allow the configuration to take effect. If the user want to discard
any changes on the configuration, please click Cancel button. Then, the page will be reloaded.
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
Attention

In order to avoid disconnection issue, using LAN interface to setup Wireless Configurations is
recommended. The Web UI (User Interface) might freeze or lock up if the setup is made using the
wireless interface because the connection would be lost whenever wireless settings are changed. It
might take some time for the device to attach to the Access Point with new settings.
Each configurable option under the Basic Settings is described as follows:













SSID: This specifies the SSID (or network name) that SW550X should connect to wirelessly. There is a “Scan
Network” button on the right of the empty text box. This button makes it possible to look for nearby available
wireless networks to attach to. Once clicked, it will start a scanning process and prompt a window with a list
of available wireless networks. Detailed steps for setting the SSID or using Scan Network button will be
explained after this list.
BSSID (MAC Address): This refers to access point’s MAC address on which the SW550X should connect to.
Enabling this option by checking the box behind it will lock SW550X to that access point. Therefore, SW550X
would not roam to another access point with the same SSID.
WPS BUTTON: The WPS acronym stands for Wi-Fi Protected Setup and the PBC stands for Push Button
Configuration. To use this feature, first trigger the WPS process in a WPS supported access point (AP) and
click on the Start WPS PBC button on SW550X’s UI. The AP and the SW550X should connect automatically.
Note that the Topology setting (next option) in this case should be Infrastructure and the Band Mode (option
after the next) should be Auto so that the WPS can work. Note that this button is unavailable when the
Wireless Profiles is enabled.
Topology: There are two type of wireless network topologies which are Infrastructure (for connecting to an
Access Point) or Ad Hoc (for connecting to a wireless client). Note that the Ad Hoc mode is unavailable when
the Wireless Profiles is enabled.
Band Mode: This option allows user to select the radio frequency band which are supported by IEEE 802.11b,
802.11b/g, 802.11b/g/n, 802.11a, and 802.11a/n standards. It is recommended to leave this option to Auto
for SW550X to sense for the best available mode automatically by checking the Auto box.
Channel: This option allows the user to specify the radio channel number for SW550X to operate on. However,
the available channels would depend on the Band Mode and the regulatory domain (CN, EU, TW, or US)
selected in the Wireless Advanced Settings (discussed next section). This option is disabled when the Band
Mode is set to Auto.
Bandwidth: This option allows SW550X to select between 20 MHz or 40 MHz radio bandwidth usage. The
latter fills a larger spectrum; hence, it provides a better throughput if it is allowed by the Access Point.
However, it is not recommended to use 40 MHz at 2.4 GHz band for IEEE 802.11b/g/n standards.
Channel: This option specifies the radio channel number that SW550X will use which can be chosen from the
drop down list between 1 and 11.
Authentication Mode: This option allows the selection of wireless network authentication mechanisms which
could be OPEN, SHARED, WPA-PSK, WPA2-PSK, WPA2 (PEAP), WPA2 (EAP-TLS), and WPA2 (EAP-TTLS).
Encryption Type: This option specifies the encryption algorithm for wireless connection which could be WEP,
TKIP and AES. However, please beware that WEP and TKIP are not supported by the IEEE 802.11n standard;
therefore, the wireless link speed would be limited to 54Mbps.
WEP Key: This option is enabled when Authentication Mode is set to OPEN and Encryption Type is set to
WEP. Up to 4 different hexadecimal or ASCII keys can be entered in this option.
WPA-PSK/WPA2-PSK Passphrase: This option is enabled when Authentication Mode is set to WPA-PSK or
WPA2-PSK. The passphrase can be between 8 and 63 characters long.
WPA2 (with RADIUS): Depending on selected Authentication Mode, different fields in this option will be
enabled. WPA2 (PEAP) would require you to provide the user, password, and the certificates. WPA2 (EAPTLS) would require you to provide the certificates and private key password. WPA2 (EAP-TTLS) would require
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
you to provide the user, the password, and the certificates. Please note that only *.pem certificates are
supported.
Please remember that 2.4 GHz frequency can be easily interfered by other wireless devices that operate in the same
spectrum (namely, Bluetooth, ZigBee, microwave oven, etc.); therefore, it is better to choose the IEEE 802.11a/n
which operates in the 5 GHz spectrum when the user’s network allows.
Steps to Connect to an Access Point
You can manually enter the SSID of the connecting access point in the SSID option or use the “scan network” button
to have SW550X grab the necessary wireless information of surrounding access points in the device’s coverage
area. Please be patient as this process might take up to 10 seconds.
Once it has finished scanning, names and basic properties of available wireless networks will be shown below. You
can then select an AP from the list by clicking on the radio button in front of the desired SSID. Then, click on the
“Connect” button at the bottom of the page and its settings would be loaded automatically to the device’s user
interface (UI). If you would like the scanning process to run again, just click on the “Refresh” button. Otherwise,
click on the “Close” button to close this window.
Figure 4.29 Results of network scanning when uses “scan network” buttons
If no wireless networks have been found, the list would be empty as shown below.
Figure 4.30 Result when there is no wireless network available in the area.
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
After finish configuring the Basic Settings, please click on Save button to keep the change that you have made. A
pop-up window with message “Please wait for a while…” will be displayed. When the saving is finished, the popup window will disappear and the web browser will remain on the Basic Settings page. If you want to cancel the
change and reset all changes back to their original values, just click the Cancel button.
4.4.3
Advanced Settings
This subsection provides details on wireless network parameters for performance tuning. Changing options in this
section may affect overall performance of your SW550X; therefore, please be cautious. If you are still unclear on
the effect of each option, please refrain from altering it. Figure below depicts the Wireless Advanced Settings page.
Figure 4.31 Wireless Advanced Settings Page when Wireless Profile is Disabled and Topology is set to
infrastucture

Radio Off – When this option is enabled, this allows the user to turn off the wireless interface completely.

Fast Handoff – This option enables Atop’s proprietary protocol to speed up roaming between AW5500s
(Atop’s Industrial Wireless Serial Device Servers) in addition to Fast Roaming (next option). Enable this option
to allow AW5500 to share its neighboring AW5500 information to SW550X to further reduce its roaming time.

Fast Roaming – Enable this option to allow SW550X to scan for available access points in the background to
speed up roaming when necessary.

Roaming Threshold – This option set the threshold level used to determine when SW550X should try to
connect to another access point when the wireless signal drops below the selected range. The available
thresholds are Low (25%), Normal (50%), and High (75%).

Tx Power – This option allows user to set the SW550X’s Transmission Power. The transmission power can
be reduced to prevent wireless interference to other wireless networks.
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup

Regulatory Domain – This can be selected from 4 options in the drop-down list box: CN(APL1_WORLD),
EU(ETSI2_WORLD), TW(APL3_FCCA), US(FCC5_FCCA), and VN(ETSI3_WORLD). Note that different
Regulatory Domains will result in different radio channels/frequencies being allowed SW550X to operate (see
Channel setting in previous subsection).

Disconnected Detection – When this option is checked, SW550X will use the Ping command to check whether
the wireless connection between SW550X and a target device is still active. When the Disconnected Detection
is already enabled and the mentioned connection is disconnected, SW550X will re-initiate wireless connection
again after a certain period of time which can be set in the Time option (next line). The reconnection time can
be set between 30 and 300 seconds. The target device can be specified by entering its IP address in the
Target IP option. Note that the user should ensure that SW550X can establish the connection with its target
device first.

STP – The Spanning Tree Protocol is only available in the AP Client mode. Enable this option if STP is enabled
in the user’s network to prevent network loops by setting up the Forward Delay time. When disabled, SW550X
will not forward STP Bridge Protocol Data Units (BPDUs).
Note that if Wireless Profile (Paragraph 4.4.1 above) feature is enabled, Fast Handoff, Fast Roaming and
Roaming Threshold, and STP options will not be presented and supported, as shown below.
Figure 4.32 Wireless Advanced Settings Page when Wireless Profile is Enabled
After finish configuring the Advanced Settings, please click on “Save & Apply” button to keep the change that you
have made. A pop-up window with a message “Please wait for a while…” will appear briefly. Then, another pop-up
window with message “The settings have been completed” will be displayed. When the saving and applying are
finished, the pop-up window will disappear and the web browser will be redirected to the Operation Mode page. If
you want to cancel the change and reset all changes back to their original values, just click the Cancel button.
SW5501 – SW5502
Wireless Serial Server
4.5
4.5.1
User Manual
Configuration and
setup
Web configuration – Serial
COM Port Overview
Since details on Link Mode connectivity protocols and its settings of SW550X series are given in the Chapter Error!
eference source not found.. Chapter, this section will only focus on the Serial Settings only. Figure below shows
an example of the COM 1 Port Settings where the upper part is dedicated for Link Mode settings and the lower part
is dedicated for Serial Settings. Note that similar settings page is applicable for COM 2 Port Settings on SW550X
device.
Figure 4.33 COM 1 Port Setting Page
SW5501 – SW5502
Wireless Serial Server
4.5.2
User Manual
Configuration and
setup
COM Configuration
Figure below shows the Serial Settings part of COM port settings. Note that these settings need to match the
parameters on serial port of the serial device. Each option is later on described in detail.
Figure 4.34 Serial Settings Part of COM Port

Serial Interface: This option allows selection between RS-232, RS-422, and RS-485 standards. Note that RS485 support both 2-Wire RS-485 and 4-Wire RS-485.

Baud Rate: The user can select one of the baud rates (from 110 to 921600 bps) from the drop-down list.

Parity: The available Parity options are None, Odd, Even, Mark, or Space.

Data Bits: The setting for Data Bits can be 5 bits, 6 bits, 7 bits, or 8 bits.

Stop Bits: The number of Stop Bits can be either 1 bit or 2 bits.

Flow Control: The user can choose among None (No Flow Control), RTS/CTS (Hardware Flow Control), or
Xon/Xoff (Software Flow Control). If Xon/Xoff is selected, the Xon and Xoff characters are changeable.
Defaults are 0x11 for Xon and 0x13 for Xoff. Note that these are hexadecimal number of ASCII characters
(i.e., 0x11 = ‘1’ and 0x13 = ‘3’). If the connecting program or serial device would like to receive the Xon/Xoff
signals also, the user can enable the “Permit Xon/Xoff Character Pass Through” by checking the box in front
of the option.
After finish configuring the COM Port Serial Settings, click on Save & Apply button to keep the change that you
have made. Note that after click Save & Apply the web browser will remain on the Serial Settings page. If you want
to cancel the change and reset all changes back to their original values, just click the Cancel button. The Advanced
Settings button will be described in the next subsection.
SW5501 – SW5502
Wireless Serial Server
4.5.3
User Manual
Configuration and
setup
COM Configuration: Advanced Settings
For advanced details of COM port setting, click on Advanced Settings button at the end of Serial Settings page. It
will open another web browser window as shown below. Description of each option is explained as follows.
Figure 4.35 Advanced COM Port Settings Page
TCP

APP-level Receive Timeout: This option specifies the value of Application Level Timeout to force SW550X to
actively close a TCP connection if SW550X did not receive packet from application layer for some specific
inactivity period (i.e. no exchanged packets). The default value is 3,600 seconds. The maximum value is
36,000 seconds. Disabling this option means that SW550X would never actively close an established
connection.

TCP timeout: By clicking the Enable box of TCP Timeout and input value in seconds between 6 an 36000, the
TCP-socket keep-alive feature in SW550X will be enabled. After the timer expires, the TCP’s keep-alive
procedure will send a keep-alive packet to its peer to check wether the connection is broken.

Wait time to reconnect: The user can only use this feature when SW550X is on TCP client mode. After a TCP
connection is closed, the device will wait for a specific interval of time before it creates a new socket. The
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
time interval can be set between 1 and 100 seconds.

Check Medium: Due to the unstable nature of wireless connections, sometimes even the connection (physical
layer) is already broken, the TCP Server (application layer) is unaware and still active. Some applications
establish a new TCP connection instead of recycling an old connection, the existing TCP connection needs to
be automatically closed to allow a new incoming TCP Client connection. With this option, the user can set the
waiting time of the physical medium’s recovery. The period of waiting time can be in between 3 to 30 seconds.
If the physical connection cannot be recovered in the previously set time, the TCP Server will forcefully close
the existing TCP connection. The default value is three seconds. Decreasing this value might result in
unfavorable network behavior.
Delimiters

Serial to Network Packet Delimiter: Packet delimiter is a way of packing data in the serial communication. It
is designed to keep packets in track. SW550X provides three types of delimiter: Time Delimiter, Maximum
Bytes and Character Delimiter. Note that the following delimiters (Interval, Max Byte and Character) when they
are selected are programmed in the OR logic. Meaning that if any of the three conditions were met, SW550X
would transmit the serial data in its buffer over the network.

Interval timeout: SW550X will transmit the serial data in its buffer when the specified time interval has
reached and no more serial data comes in. The default value is calculated automatically based on the baud
rate. If the automatic value results in chopped data, the timeout could be increased manually by switching to
“Manual setting” (checking the radio button in Figure 3.35) and specifying a larger value in the text box above.
Note that the maximum interval is 60,000 milliseconds.
Attention
Manual Calculation of Interval Timeout
The optimal “Interval timeout” depends on the application but it must
be at least larger than one character interval within the specified baud
rate. For example, assuming that the serial port is set to 1200 bps, 8
data bits, 1 stop bit, and no parity. In this case, the total number of bits
needed to send a character is 10 bits (included 1 start bit), and the
time required to transfer one character is (10 (bits)/1200
(bits/s))*1000 (ms/s) = 8.3 ms. Therefore, you should set the “Interval
timeout” to be larger than 8.3 ms. Rounding 8.3 ms to the next integer
would give you 9 ms. Which can be set as your interval timeout.

Discard Bytes: SW550X will keep packets from the serial interface into its buffer, assemble data into a TCP
packet based on user’s setup condition, and then send the packet to the network. The compared condition to
discard data can be more than, less than, equal to, or non-equal to a specific number of data (in Bytes). Within
the timeout interval, if the condition is not satisfied, the data in buffer will be packed and sent out.

Max Bytes: SW550X will transmit the serial data in its buffer when the specified length in the unit of bytes has
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
reached. The range of maximum bytes is between 1 to 1452 bytes. Enable this option if you would like
SW550X to queue the data until it reaches a specific length. This option is disabled by default.

Character: SW550X will transmit the serial data in its buffer when it sees the incoming data include the
specified character (in hexadecimal (HEX) format). This field allows one or two characters. If character
delimiter is set to 0x0d, SW550X will push out its serial buffer when it sees 0x0d (carriage return) in the serial
data. This option is disabled by default.

Send one character every
□ ms: SW550X will save packets received from the network to its buffer, while
kepp sending one character every designate time interval.

Network to Serial Packet Delimiter: This group of options is the same as the delimiters described above, but
they control data flow in the opposite direction. SW550X will store data from the network interface in its
queue. Until one of the delimiter conditions described above is met then SW550X will send the data over to
the serial interface.

Character Send Interval: This option specifies the time gap between each character. When set to one second
(1000ms), SW550X would split the data in the queue and only transmit one character (a byte) every 1 second.
The maximum value for this option is 1000 milliseconds or 1 second. This option is disabled by default.

Response Interval Timeout: This option only affects the Request & Response Mode and has no effect on the
Transparent Mode. Please see the discussion about Request & Respond Mode versus Transparent Mode
later. When TCP data is received (a request from network) and passed to serial device side, the SW550X
device will wait for the set time before transferring another TCP data if the serial device side did not receive
any data (no response from the serial device). The maximum value for this option is 60,000 milliseconds or 1
minute.
Serial

Serial FIFO: By default, SW550X has its First-In-First-Out (FIFO) function enabled to optimize its serial
performance. In some applications (particularly when the flow control mechanism is enabled), it may deem
necessary to disable the FIFO function to minimize the amount of data that is transmitted through the serial
interface after a flow off event is triggered to reduce the possibility of overloading the buffer inside the serial
device. Please note that disabling this option on baud rates higher than 115200bps would noticeably reduce
the data integrity.

Serial Buffer: By default, SW550X will empty its serial buffer when a new TCP connection is established. This
means that the TCP application will not receive buffered serial data during a TCP link breakage. To keep the
serial data when there is no TCP connection and send out the buffered serial data immediately after a TCP
connection is established, you can disable this option.
After finish configuring the COM Port’s Advanced Settings, please click on Save & Apply button to keep the
change that you have made. There will be a “Save Successfully” message show up on the same browser window
of Advanced Settings page. Then, the Advanced Settings browser window will be closed automatically and you
will be returned to COM 1 Port Setting page.
SW5501 – SW5502
Wireless Serial Server
4.6
User Manual
Configuration and
setup
Web configuration - SNMP/Alert Settings
The Simple Network Management Protocol (SNMP) is used by network management software to monitor devices
in a network, to retrieve network status information of the devices, and to configure network parameters of the
devices. The SNMP Settings page showed below allows user to configure SW550X device so that it can be viewed
by third-party SNMP software.
Figure 4.36 SNMP/Alert Settings Page
SW550X provides three basic SNMP fields which are: “System Contact” usually used to specify the device’s contact
information in case of emergency (default value is “contact”), “System Name” usually used to identify this device
(default value is the MAC Address of SW550X), and “System Location” usually used to specify the device location
(default value is “location”). To make the device information available for public viewing/editing, you can enable the
SNMP function by checking the Enable box and fill in the two passphrases (or SNMP Community Strings) below it.
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
By filling in the passphrase for the “Read Community”, SW550X device allows other network management software
to read its information. By filling in the passphrase for the “Write Community”, SW550X device allows other network
management software to read/modify its information. The default SW550X’s SNMP Community Strings (or
passphrases) for Read Community and Write Community as shown in Figure 3.36 are “public” and “private”,
respectively.
Additionally, you can setup a SNMP Trap server in the network to receive and collect all alert messages from
SW550X. To configure SW550X to dispatch alert messages originated from any unexpected incidents, you can fill
in the IP Address of the SNMP Trap Server in the field shown above. Note that any changes in these settings will
take effect after the SW550X device is restarted.
Under the SNMP Trap server, there is a list of Alert Type under Event alert settings box. There are two possible
actions for each alert event: Email and SNMP Trap. You can enable the associated action(s) of each alert event by
checking the box under the column of Email and/or SNMP Trap. When the Email box is checked and the
corresponding event occurs, it will trigger an action for SW550X to send an e-mail alert to designated addresses
configured in the E-Mail Settings (described in the next section). When the SNMP Trap box is checked and the
corresponding event occurs, it will trigger an action for SW550X to send a trap alert to the designated SNMP Trap
server.
There are seven events that will trigger the alarm from SW550X as listed in figure above. These alerts are useful
for security control or security monitoring of the SW550X device:







Cold Start: This event occurs when there is a power interruption.
Warm Start: This event occurs when the device resets.
Wireless Disassociated: This event occurs when wireless interface (IEEE 802.11) of SW550X disassociates
from an Access Point.
Wireless Associated: This event occurs when wireless interface (IEEE 802.11) of SW550X associates with an
Access Point.
Authentication Failure: This event occurs when an incorrect username and/or password are entered which
could indicate an unauthorized access to the SW550X.
IP Address Changed: This event occurs when the SW550X device’s IP address is changed.
Password Changed: This event occurs when the administrator password is changed.
After finish configuring the SNMP/Alert Settings, please click on Save & Apply button to keep the change that you
have made and to apply your setting. A pop-up window with message “Please wait for a while…” will be
displayed. When the saving and applying are finished, the pop-up window will disappear and the web browser will
remain on the SNMP/Alert Settings page. If you want to cancel the change and reset all changes back to their
original values, just click the Cancel button.
4.7
Web configuration - E-mail Settings
When SW550X device raises an alert and/or a warning message, it can send an e-mail to an administrator’s mailbox.
This E-mail Settings page allows you to set up the SW550X to be able to send an e-mail. Figure below shows the
E-mail Settings page in which there are two configurable parts: E-mail Address Settings and E-mail Server. First
for the E-mail Address Settings part, a Sender’s e-mail address is required to be filled in the Sender’s text box
which will be used in the From field of the e-mail. Note that the maximum length of sender email address is 48
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
characters. Then, for the Receiver’s text box you can enter multiple recipients which will be used in the To field of
the e-mail. Note that to fill in multiple receiver e-mail addresses in the Receiver’s text box, please separate each email address with semicolon (;).
Figure 4.37 E-mail Settings Page
Second for the E-mail Server part, you must enter an IP address or Host Name of a Mail Server which is in your
local network in the SMTP Server’s text box. Note that the maximum length of SMTP server address is 31
characters. If your Mail Server (or Simple Mail Transfer Protocol (SMTP) Server) requires a user authentication, you
must check the “SMTP server authentication required” box in the Authentication option. After enabling this option,
you can fill in the Username and the Password below. Please consult your local network administrator for the IP
address of you Mail Server and the required Username and Password. At the end of the page, there is a Send Test
Mail button for you to click to verify whether the E-mail Settings are configured correctly. Note that after clicking
the Send Test Mail button, a pop-up window with message “Please wait for a while…” will be displayed and will be
followed with another pop-up window indicating the success or failure status of sending test e-mail. Figure below
shows a pop-up window indicating a failure of sending a test e-mail.
Figure 4.38 Sending Test E-mail Failed
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
Attention
It is also important to setup Default Gateway and DNS Servers in the Network
Settings properly so that SW550X can lookup domain names and route the emails to the proper default gateway. Please see the Default Gateway and DNS
Sever Settings in Section 4.3 above
After finish configuring the E-mail Settings, please click on Save & Apply button to keep the change that you have
made and to apply your setting. A pop-up window with message “Please wait for a while…” will be displayed. When
the saving and applying are finished, the pop-up windows will disappear and the web browser will remain on the Email Settings page. If you want to cancel the change and reset all changes back to their original values, just click
the Cancel button.
Web configuration - Log Settings
4.8
4.8.1
System Log Settings
The Syslog function is turned on by default and cannot be turned off for SW550X. It is used to keep log for system
events and report to an external Syslog server if necessary. Figure below shows the System Log Settings page
under the Log Settings menu. Description of each option is as follows.
Figure 4.39 System Log Settings Page






Enable Log Event to Flash: When the check box is enabled, SW550X will write log events to the local flash.
Otherwise the log events would be cleared when the device restarts because they are stored in the RAM by
default.
Enable Syslog Server: When the check box is enabled, it will allow SW550X to send Syslog events to the
remote Syslog server with the specified IP address (next option). All the data sent/received from serial
interface will be logged and sent to Syslog Server.
IP Address: The user must specify the IP address of a remote Syslog Server in this field.
Syslog Server Service Port: This option allows user to specify the remote Syslog Server Port. Note that the
default port number is 514.
Enable Wireless Log: When the wireless log is enabled, the status of scan, authentication, connection, etc.
will be captured.
Save Kernel Log: Press the Backup button in this option to save all kernel log messages including wireless
log to a file on the user’s PC.
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
After finish configuring the System Log Settings, please click on Save & Apply button to keep the change that you
have made and to apply your setting. A pop-up window with message “Please wait for a while…” will be
displayed. When the saving and applying are finished, the pop-up window will disappear and the web browser will
remain on the System Log Settings page. If you want to cancel the change and reset all changes back to their
original values, just click the Cancel button.
4.8.2
COM Log Settings
Transmitted data through COM port could be logged for recording or debugging purposes. Additionally, the logs
could be reported to an external Syslog server as well. Figure 3.40 shows the COM Log Settings page under the
Log Settings menu. Description of each option is explained as follows.
Figure 4.40 COM Log Settings Page









Enable Log event to Flash: When the Enabled box is checked, all the serial logs are saved into flash. The
maximum number of files is 5, while each file contains 15K bytes.
Log Data Contents: if this option is enabled, the COM logging function will log the content’s data that is being
transmitted and received in raw bytes. If this option is disabled, COM logging function will only log the length
of data to reduce system load.
Data types: There are two radio buttons which are hexadecimal (HEX) and ASCII for user to select the desired
logged data’s format.
COM Ports: The user can select which port(s) will be logged by checking the corresponding boxes.
Enable Syslog Server: Enabling this option would allow user to send COM logs to a remote Syslog server. It
is possible to send COM logs to the same Syslog server used previously for event logging (See Chapter 4.8
above).
IP Address: When the Syslog Server is enabled, please specify the remote Syslog server’s IP address in this
field.
Syslog Server Service Port: This option allows user to specify the remote Syslog Server Port. Note that the
default port number is 514.
Transfer Log Data by FTP: If the Enabled box is checked for this option, the COM log will be sent out by FTP
client every specific time interval. The user also needs to specify the next four fields for FTP data transfer.
FTP IP Address: This is the IP address of the FTP server that the log will transfer to.
SW5501 – SW5502
Wireless Serial Server





User Manual
Configuration and
setup
FTP Server Service Port: This is the service port for FTP service. The default service port number for FTP
server is 21. However, the user can specficy the port number in between 1 and 65535.
FTP Username: This is the username for an account on the FTP server. It will be used to login to the FTP
server.
FTP Password: This is the password for an account on the FTP server. It will be used to authenticate the
account on the FTP server.
Transfer Log Data by Email: When the Enabled box is checked for this option, a COM log will be sent out by
E-mail every specific time interval (the next field). Note that the user must set up an E-mail information
correctly to be able to transfer log data by E-mail as shown above. Please see the detail explanation of the Email Settings in Chapter 4.7 above.
Transfer Time Interval: This an interval in hours that the user can specify for the log to be transferred.
After finish configuring the COM Log Settings, please click on Save & Apply button to keep the change that you
have made and to apply your setting. A pop-up window with message “Please wait for a while…” will be displayed.
When the saving and applying are finished, the pop-up window will disappear and the web browser will remain on
the COM Log Settings page. If you want to cancel the change and reset all changes back to their original values,
just click the Cancel button.
4.8.3
Event Log
This page displays the current event log stored in the SW550X device. Figure below shows an example of logged
event. Each record of the log consists of Index, Date, Time, Startup Time, and Event description.
Figure 4.41 Event Log Page
At the end of the Event Log page, there are two buttons which can be used to navigate through all records. You can
click on the “Last Page” button to go to the last page of the log and click on the “Next Page” button to go to the
next page. To display all events in one page, you can click on “Show All Events” button. By clicking on “Clear All
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
Events” button, you can clear all events stored in the device and the Event Log will be empty with a message “There
is no event”. To save all events to a local file (on your personal computer), you can click on “Save To File” button.
4.8.4
COM DataLog
This page displays the current COM data log stored in the device. The desired COM port number can be selected
from the COM x Log drop-down list in Figure 3.43, which allows it to display logs from different COM ports. An
example of COM 1 Log is shown in Figure 3.43. The first three lines were set to log length of data while the last
four lines were set to log data’s content. The letter R refers to “Received data” while letter T refers to “Transmitted
data”. The number in the bracket, “()”, is the length of the data in Bytes. Each record of the log consists of Index,
Date, Time, Startup Time, and Event.
Figure 4.42 COM Datalog Page
At the end of the COM Datalog page, there are two buttons which can be used to navigate through all records. You
can click on the “Last Page” button to go to the last page of the log and click on the “Next Page” button to go to the
next page. To display all events in one page, you can click on “Show All Events” button. By clicking on “Clear All
Events” button, you can clear all events stored in the device and the COM DataLog will be empty with a message
“There is no event”. To save all events to a local file (on your personal computer), you can click on “Save To File”
button.
SW5501 – SW5502
Wireless Serial Server
4.9
4.9.1
User Manual
Configuration and
setup
Web configuration – System Setup
Date/Time Settings
Date and time can be set manually or using Network Time Protocol (NTP) to automatically synchronize date and
time of SW550X with a Time Server. Figure below shows the Date/Time Settings page. Note that the Current
Date/Time will be updated automatically on this page. To enable automatic time synchronization, please check the
“Obtain date/time automatically” box in the NTP option below NTP Server Settings part. Then proceed to enter the
IP address or host name for the NTP Server. Note that if a host name is entered, the DNS server must be configured
properly (see detail in Section 4.3 above). Additionally, a Time Zone can be selected as well from the drop-down
list. Daylight Saving Time Setting is enabled when Enable Daylight Saving Time box is checked. When it is enabled,
the user can select the detailed setting, such as Start Date and End Date with Offset. Manual Time Settings can be
set in the lower part where user can set Date and Time using corresponding drop-down lists.
Figure 4.43 Date/Time Settings Page
Attention
It is also important to setup Default Gateway and DNS Servers in the Network Settings
properly (See Section 3.5), so SW550X can lookup DNS names and point to the proper
NTP server.
After finish configuring the Date/Time Settings, please click on Save & Apply button to keep the change that you
have made and to apply your setting. A pop-up window with message “Please wait for a while…” will be
displayed. When the saving and applying are finished, the pop-up window will disappear and the web browser
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
will remain on the Date/Time Settings page. If you want to cancel the change and reset all changes back to their
original values, just click the Cancel button.
4.9.2
Admin Settings
The SW550X Series allows user and password management through this Admin Settings page under System Setup
menu. By default, the user name is “admin” and the password is blank. To set or change their values, you can enter
the information in the User name, the Old password, the New password and the Repeat new password fields as
shown below.
Figure 4.44 Admin Settings Page
There are two ways to access SW550X’s Web User Interface (Web UI). The first one is via Hypertext Transfer
Protocol (HTTP) and the other is via Hypertext Transfer Protocol Secure (HTTPS). For enhanced security, it is
recommended to use the encrypted HTTPS protocol. Note that HTTP uses port 80 while HTTPS uses port 433. You
can configure whether to add security layer (or encryption) for Web UI configuration via the Web mode option by
choosing between HTTP and HTTPS radio buttons.
After finish configuring the Date/Time Settings, please click on Save & Apply button to keep the change that you
have made and to apply your setting. A pop-up window with message “Please wait for a while…” will be
displayed. When the saving and applying are finished, the pop-up window will disappear and the web browser
will remain on the Date/Time Settings page. If you want to cancel the change and reset all changes back to their
original values, just click the Cancel button.
SW5501 – SW5502
Wireless Serial Server
4.9.3
User Manual
Configuration and
setup
Firmware upgrade
Updated firmware for SW550X is provided by Atop from time to time (for more information please visit Atop News
& Events webpage) to fix bugs and optimize performance. It is very important that the device is NOT turned off or
powered off during the firmware upgrading, (please be patient as this whole process might take up to 7 minutes).
Before upgrading the firmware, please make sure that the device has a reliable power source that will not be
powered off or restarted during the firmware upgrading process.
To upgrade a new firmware to SW550X, please downloaded the latest firmware for your SW550X model from the
download tab on the SW550X product page or from the Download page under the Support link on Atop’s main
webpage. Then, copy the new firmware file to your local computer. Note that the firmware file is a binary file with
“.dld” extension. Next, open the Web UI and select Firmware Upgrade page under the System Setup menu. Then,
click “Browse” button as shown in below Figure to find and choose the new firmware file. Then, click “Upload”
button to start the firmware upgrade process. The program will show the upload status. Please wait until the
uploading process is finished (the amount of time varies depending on the equipment used). Finally, the SW550X
device will then proceed to restart itself. In some cases, you might require to re-configure your SW550X device. To
restore your backup configuration from a file, please see the procedure in the next subsection.
Figure 4.45 Firmware Upgrade Page
Note: if the firmware upgrade process fails and the device becomes unreachable, please follow the TFTP recovery procedure on the Emergency
System Recovery.
4.9.4
Backup/Restore Settings
Once all the configurations are set and the device is working properly, the user should back up the current
configuration of SW550X. The backup configuration file can be used when the new firmware is uploaded and the
device is reset to a factory default settings. This is done to prevent accidental loading of incompatible old settings.
The backup configuration file could also be used to efficiently deploy multiple SW550X Series devices of similar
settings by uploading these settings to all devices.
To back up configuration, click “Backup” button under the Backup Configuration part as shown in below Figure,
and a pop-up dialog will prompt the user for saving the backup file (station.ini) on user’s computer. It is important
NOT to manually modify the saved configuration file by any editor. Any modification to the file may corrupt the
file and it may not be used for later restoration.
Please contact Atop authorized distributors for more information on this subject.
To restore the backup configuration, click “Browse” button under the Restore Configuration part as shown in Figure
below to locate the backup configuration file on user’s computer. Then, click on “Upload” button to upload the
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
backup configuration file to the device. Once the backup configuration file is successfully uploaded, the device will
restart. Note that the time needed for this process may vary on the equipment used.
Figure 4.46 Backup/Restore Setting Page
4.9.5
Management List
The Management List is used to filter the MAC addresses that can have access to the Web management interface
or Web UI. When Management List is enabled, only the MAC addresses entered in the list of allowed MAC address
can gain access to the Web UI of SW550X. Check the radio button in front of the “Allow uses with MAC addresses
listed below” to enable the MAC address list. Note that the Access Control List allows user to input up to 10 MAC
addresses and must be entered in the XX:XX:XX:XX:XX:XX format (where XX are hexadecimal numbers).
Figure 4.47 Management List Page
SW5501 – SW5502
Wireless Serial Server
User Manual
Configuration and
setup
After finish configuring the Management List, please click on Save & Apply button to keep the change that you
have made and to apply your setting. A pop-up window with message “Please wait for a while…” will be displayed.
When the saving is finished, the pop-up window will disappear and the web browser will remain on the Management
List page. If you want to cancel the change and reset all changes back to their original values, just click the Cancel
button.
4.9.6
Ping
The Web UI of SW550X has an interface to call Ping, which is a network diagnostic utility for testing reachability.
You can use the Ping function to determine whether SW550X can reach the gateway or other devices in the network.
To use the Ping, enter a destination IP address in the text box behind the Ping To and click Start button as shown
in Figure 3.49. This process usually takes around 20 seconds. The two figure below represent a successful ping
without packet loss from SW550X to the address 10.0.50.201 and back, and the connecting device at the address
10.0.50.202 is unreachable in which no packets have returned from the transmitted ping packets.
Figure 4.48 Successful Ping with No Packet Loss
Figure 4.49 Unsuccessful Ping with 100% Packet Loss
SW5501 – SW5502
Wireless Serial Server
4.10
User Manual
Configuration and
setup
Web configuration – Reboot and Restore to default Settings
To manually reboot the SW550X device, click on the “Reboot” button at the end of the Reboot page. The device will
then restart. A pop-up window with a message “Please wait for a while…” will be displayed with a countdown
number in seconds. If a restoration to the factory default settings is needed, please check the “Reset” box before
clicking on the Reboot button. When the rebooting process is finished, the pop-up window will disappear and the
web browser will be redirected to the Operation Mode page.
Figure 4.50 Reboot Page
Figure 4.51 Pop-up Windows while Rebooting SW550X with Reloading Countdown in Seconds
SW5501 – SW5502
Wireless Serial Server
User Manual
Link modes and
Applications
5 Link modes and Applications
5.1
Link Mode Configuration
SW550X Series supports different Link Modes which are TCP Server, TCP Client, and UDP. The Link Mode describes
the role of SW550X and the connection between SW550X device and other remote devices in the network which
would like to communicate with serial devices on SW550X’s COM ports. Under the three Link Modes, TCP Server
mode can support RAW, Virtual COM, Reverse Telnet, or Pair Connection Master applications, while TCP Client
mode can support RAW, Virtual COM, or Pair Connection Slave applications. Note that UDP mode does not have
the same supported applications as the previous two TCP modes.
Discussion on how to setup different Link Modes properly will be presented in the following sections. Figure below
show the Link Mode options for COM 1 port which can be found on COM 1 page under Serial menu of Web UI (See
details on Serial Settings in Chapter 4.5 above).
Figure 5.1 Link Mode Options for COM 1 Port
5.1.1
Link Mode: Configure SW550X as a TCP Server
SW550X Series can be configured as a Transport Control Protocol (TCP) server in a TCP/IP network to listen for an
incoming TCP client connection to a serial device. Figure 4.2 depicts an example of a PLC (serial) device which is
connected to SW550X on a serial bus where a remote host computer is sending a request via Ethernet network.
After the connection is established between the serial device server (SW550X) and the remote host computer
(remote TCP client) in the figure, data can be transmitted in both directions. This also applies whenever the Virtual
COM (VCOM) application is running on server mode. Please note that this is the SW550X device’s default link mode.
Figure 5.2 An Example of TCP Server Link Mode
SW5501 – SW5502
Wireless Serial Server
User Manual
Link modes and
Applications
The default Link Mode of SW550X is the TCP Server mode. Below an example of configuration setting for TCP
Server Link Mode under the COM 1 page. There are additional connection settings that can be configured as shown
in Figure below. By selecting the TCP Server Link Mode, a TCP Client program on a remote host computer should
be prepared to connect to SW550X. Please follow the following steps to configure connection settings of the Link
Mode for each COM port.
Figure 5.3 Connection Settings for TCP Server Link Mode
SW5501 – SW5502
Wireless Serial Server

User Manual
Link modes and
Applications
Click on the “COM1” link on the menu frame on the left hand side of Web UI to go to COM 1 page as shown
in Figure 4.4. Note that if you would like to configure COM 2, please follow the same procedures.
Figure 5.4 TCP Server Link Mode Settings under COM 1 Page

Select TCP Server radio button in the Link Mode options. Note that TCP Server is the default Link Mode for
COM port of SW550X.

Under the TCP Server section, you will find the following options.
Application: There are 4 different communication applications to choose from here:


RAW: There is no protocol on this mode which means that the data is passed transparently.

Virtual COM: The Virtual COM protocol is enabled on the serial device to communicate with a
virtualized port from a remote client. It is possible to create a Virtual COM port on Windows/Linux
in order to communicate with the serial device as a remote client.

Reverse Telnet: This application is used to connect the serial device and another serial device
(usually a Terminal Server) with a Telnet program. Telnet programs in Windows/Linux usually
SW5501 – SW5502
Wireless Serial Server
User Manual
Link modes and
Applications
require special handshaking to get the outputs and formatting to show properly. The SW550X
series will interact with those special commands (CR/LF commands) once Reverse Telnet
application is enabled.

Pair Connection Master: This application is used when the user want to pair two serial devices
over the Ethernet network.
IP Filter: This option will enable the Source IP option below. When this option is checked, SW550X

will block or filter out all other IP addresses from accessing the COM port except the one specified in
the Source IP.

Source IP: This option specifies the remote client’s Source IP which will be transmitting data to our
TCP Server (on SW550X). In other words, our TCP Server will only allow data from this IP address to
flow (hence its own name implies Source IP). Note that only one source is allowed.

Local Port: This option specifies the port number that the TCP Server (on SW550X) should listen to.
It is also used by the remote TCP client to connect to the TCP server. The default local port is 4660.
You can enter different port number in this option.

Maximum Connection: This option specifies the maximum number of remote devices/clients (with
maximum of 4 clients) that can be connected to the serial device on this COM port.

Response Behavior: This option specifies how SW550X will proceed or behave when it receives
requests from remote connected hosts in which we will have the following options:

Request & Response Mode: Under this mode, the COM port on SW550X will hold requests from all
other remote connected hosts until the serial device replies or the Response Interval Timeout takes
into effect to discard it; however, unrequested data sent from the serial device would be forwarded
to all connected hosts. Additionally, user can specify how a reply message from the serial device
will be sent to the remote connected hosts with two possible options:

o
Reply to requester only: The COM port will reply to the remote connected host who has
requested the data only.
o
Reply to all: A reply is sent to all remote connected hosts.
Transparent mode: The COM port on SW550X will forward requests from all remote connected
hosts to the serial device immediately and reply to all remote connected hosts once it receives
data from the serial device.

For other Serial Settings on the same configuration page please go to Section 4.5.2 and for Advanced
Settings please go to 4.5.3 above.

After finish configuring the Link Mode, please scroll down to the bottom of the page and click on “Save &
Apply” button to save all the changes that you have made.
Note: LINK1 is associated with COM1; LINK2 is associated with COM2, and so on.
SW5501 – SW5502
Wireless Serial Server
5.1.2
User Manual
Link modes and
Applications
Link Mode: Configure SW550X as a TCP Client
SW550X Series can be configured as a TCP client in TCP/IP network to establish a connection to a TCP server on
a remote host computer. Figure 5.5 depicts an example of two serial card readers connected to two different
SW550X devices where both SW550X devices are on the same Ethernet network as the remote host computer. The
arrow in Figure 5.6 indicates the connection request from the client side of TCP connection. After the connection
is established, data can be transmitted between a serial device (connected to the COM port of SW550X) and a
remote host computer in both directions. This also applies to Virtual COM application running in the client mode.
Figure 5.5 An Example of TCP Client Link Mode
Below is shown an example of configuration setting for TCP Client Link Mode under the COM 1 page. There are
additional connection settings that can be configured. By selecting the TCP Client Link Mode, a TCP Server program
on a remote host computer should be prepared to accept a connection request from SW550X. Please follow the
following steps to configure connection settings of the Link Mode for each COM port.
Figure 5.6 Connection Settings for TCP Client Link Mode
SW5501 – SW5502
Wireless Serial Server

User Manual
Link modes and
Applications
Click on the “COM1” link on the menu frame on the left side of Web UI to go to COM 1 page as shown in
Figure 4.7. Note that if you would like to configure COM 2, please follow the same procedures.
Figure 5.7 TCP Client Link Mode Settings under COM 1 Page

Select TCP Client radio button in the Link Mode options.

Under the TCP Client section, you will find the following options.

Application: Only three communication applications are available here: RAW, Virtual COM and Pair
Connection Slave in which their definitions are the same as described in Section 5.1.1 above.

Destination IP 1: Please specify the preferred Destination IP address of the TCP Server program on
the remote host in this field. This should match the IP settings of the TCP Server program.

Destination Port 1: Please specify the preferred Port number of the TCP Server program on the remote
host in this field. Once again, this should match the IP setting of the TCP Server program.
SW5501 – SW5502
Wireless Serial Server
User Manual
Link modes and
Applications

Destination 2: You can enable second remote destination for TCP connection if necessary by checking
on the Enable box in this option. Two different TCP servers can be set for redundancy.

Destination IP 2: Please specify the preferred Destination IP address of the second TCP Server
program on the remote host in this field. This should match the IP settings of the second TCP Server
program.

Destination Port 2: Please specify the preferred Port number of the second TCP Server program on
the remote host in this field. Once again, this should match the IP setting of the second TCP Server
program.

Response Behavior: This option specifies how SW550X will proceed or behave when it receives
request from remote connected hosts. The description of each option is the same as described in
previous subsection (Section 5.1.1 above).

For other Serial Settings on the same configuration page please go to Section 4.5.2 and for Advanced
Settings please go to 4.5.3 above.

After finish configuring the Link Mode, please scroll down to the bottom of the page and click on “Save &
Apply” button to save all the changes that you have made.
5.1.3
Link Mode: Configure SW550X in UDP
Since User Datagram Protocol (UDP) is a faster transport protocol than TCP but it is a connectionless transport
protocol, it does not guarantee the delivery of network datagram. SW550X also supports connectionless UDP
protocol compared to the connection-oriented TCP protocol. The SW550X Series can be configured to transfer
data using unicast or multicast UDP from the serial device to one or multiple host computers. The data can be
transmitted between a serial device and a remote host computer in both directions.
There is no server or client concept on this protocol. All networked devices are called peers or nodes. Therefore,
you only need to specify the Local Port that SW550X should listen to and specify the Destination IPs of the remote
UDP nodes. Figure below illustrates an example of UDP Link Mode in which a serial display device is connected on
a serial bus and SW550X. Two remote host computers, which are on the same Ethernet network as SW550X, can
both send UDP datagram or messages to the serial display device through SW550X.
Figure 5.8 An Example of UDP Link Mode
SW5501 – SW5502
Wireless Serial Server
User Manual
Link modes and
Applications
Figure 5.9 shows an example of configuration setting for UDP Link Mode under the COM 1 page. There are
additional connection settings that can be configured as shown below. Please beware that even though UDP
provides better efficiency in terms of response time and resource usage, it does not guarantee data delivery. It is
recommended to utilize UDP only with cyclic polling protocols where each request is repeated and independent,
such as Modbus Protocol. Please follow the following steps to configure connection settings of the Link Mode for
each COM port.
Figure 5.9 Connection Setting for UDP Link Mode

Click on the “COM1” link on the menu frame on the left side of Web UI to go to COM 1 page as shown
below. Note that if you would like to configure COM 2, please follow the same procedures.
Figure 5.10 UDP Link Mode Settings under COM 1 Page
SW5501 – SW5502
Wireless Serial Server
User Manual

Select UDP radio button in the Link Mode options.

Under the UDP section, you will find the following options.

Link modes and
Applications

Local Port: This field specifies the local port number for UDP Link Mode on SW550X which it will be
listening to and it can be any number between 1 and 65535. Note that typically the port number that
is larger than 1024 is recommended to avoid conflicting with the well-known port numbers. You
should match this setting with the remote UDP program. Note that this number is usually called
destination port in the remote UDP program.

Destination IP Address 1 to 4 and its Port Numbers: Each line of these options can specify the range
of IP addresses and port number that will be communicating with SW550X. The user can define the
Begin and End IP Addresses here. Four groups of range of IP addresses are allowed. Please check
the box in front of that particular line to enable it. These are the IP Addresses of the remote UDP
programs and the Port that they are listening to. Note that the maximum number of UDP nodes that
SW550X can handle would highly depend on the traffic load. We have tested that SW550X can handle
up to 200 UDP nodes (with baud rate of 9600 bps, request interval of 100ms, and data length of 30
bytes).
For other Serial Settings on the same configuration page please go to Section 4.5.2 and for Advanced
Settings please go to 4.5.3 above.
After finish configuring the Link Mode, please scroll down to the bottom of the page and click on “Save & Apply”
button to save all the changes that you have made.
SW5501 – SW5502
Wireless Serial Server
User Manual
Link modes and
Applications
Link Mode Applications
5.2
This section describes application options for the TCP Server, TCP Client, and UDP Link Modes. The application
options will define how the serial data communication will be emulated over the network communication link. The
user will have flexibility in choosing the suitable application that matches their need for serial data communication.
5.2.1
TCP Server Application: Enable VirtualCOM
SW550X will encapsulate control packets on top of the real data when Virtual COM is enabled. This will allow the
Virtual COM port on the Windows/Linux operating system to access SW550X’s COM ports. The benefit of using
Virtual COM is that rewriting an existing COM program to read IP packets is unnecessary. In other words, it is
possible to use an ordinary or legacy serial (COM) program. The conversion/virtualization of IP to COM is all done
in the system driver transparently. Figure below shows SW550X in TCP Server mode with Virtual COM enabled.
Please follow the following steps to enable Virtual COM application in TCP Server Link Mode.
Figure 5.11 Virtual COM Application in TCP Server Link Mode

Follow steps in Chapter Link Mode: Configure SW550X as a TCP Server5.1.1 above to configure SW550X
in TCP Server Link Mode properly.

Click on the drop-down list of the Application option under TCP Server section and switch to “Virtual COM”
to enabled Virtual COM application in SW550X.

Scroll down to the bottom of the page and click on “Save & Apply” button to save the changes.
Configure Virtual COM in the Operating System on the remote host computer. For Windows, please refer to
Chapter 6 below for necessary instructions. Please remember SW550X’s IP address and the Local Port number
configured on this page in order to enter the same information in Serial/IP Virtual COM’s Control Panel later.
Note: that a Serial/IP Virtual COM Redirector software is provided as a utility software by Atop Technologies.
SW5501 – SW5502
Wireless Serial Server
5.2.2
User Manual
Link modes and
Applications
TCP Server Application: Enable RFC 2217 through Virtual COM
The underlying protocol of Virtual COM is based on RFC 2217 which is the Telnet COM Control Option. Therefore,
it is possible to use RFC 2217 with SW550X in the TCP Server mode. Note that the RFC 2217 allows a remote client,
which can be any network device, to initiates a Telnet session to an access server (i.e. SW550X) to communicate
with serial device on the access server’s COM port. To do so, please refer to 5.2.1 above to enable Virtual COM so
that SW550X becomes aware of the command names and codes defined in RFC 2217. Note that there is no need
to configure Virtual COM on the Operating System of the remote host computer because Virtual COM ports would
not be used.
5.2.3
TCP Client Application: Enable Virtual COM
It is also possible to run Virtual COM in TCP Client Link Mode. Figure below shows a configuration of Virtual COM
application in TCP Client Link Mode. It is usually easier to use Virtual COM in the TCP Client Link Mode if SW550X
uses dynamic IP (via DHCP) because setting a static IP address in Virtual COM’s Control Panel in the Operating
System is not possible. Please follow the following steps to enable Virtual COM application in TCP Client Link
Mode.
Figure 5.12 Virtual COM Application in TCP Client Link Mode

Follow step in Paragraph 5.1.2 above to configure SW550X in TCP Client Link Mode properly.

Click on the drop-down list of the Application option under TCP Client section and switch to “Virtual COM”
to enabled Virtual COM application in SW550X.

Scroll down to the bottom of the page and click on “Save & Apply” button to save the changes.

Configure Virtual COM in the Operating System on the remote host computer. For Windows, please refer
to Chapter 6 below for the related instruction. Please remember the Destination Port number configured
on this page in order to enter this information in Serial/IP Virtual COM’s Control Panel later.
SW5501 – SW5502
Wireless Serial Server
5.2.4
User Manual
Link modes and
Applications
TCP Client Application: Enable RFC 2217 through Virtual COM
The underlying protocol of Virtual COM is based on RFC 2217, which is the Telnet COM Control Option. Therefore,
it is possible to use RFC 2217 with SW550X in the TCP Client mode. Note that the RFC 2217 allows a client, which
is SW550X in this case, to initiates a Telnet session to a remote host computer to communicate with serial device
or serial (COM) program on the remote host computer. To do so, please refer to Paragraph 5.2.3 above to enable
Virtual COM so that SW550X becomes aware of the command names and codes defined in RFC 2217. Note that
there is no need to configure Virtual COM on the Operation System of the remote host computer because Virtual
COM ports would not be used.
5.2.5
TCP Client Application: Configure SW550X as a Pair Connection Master
A Pair Connection application is useful when pairing up two serial devices over the Ethernet or when it is impossible
to install Virtual COM in the serial devices. However, the pair connection application does require two SW550Xs to
work in pair. One would be the Pair Connection Master and the other would be the Pair Connection Slave. Figure
below shows a configuration of Pair Connection Master application in TCP Server Link Mode. Please follow the
following steps to enable Pair Connection application and set the SW550X as Master in TCP Server Link Mode.
Figure 5.13
Pair Connection Master Application in TCP Server Link Mode

Follow steps in Paragraph 5.1.1 above to configure SW550X in TCP Server Link Mode properly.

Click on the drop-down list of the Application option under TCP Server section and switch to “Pair
Connection Master” to enabled Pair Connection application in SW550X.

Scroll down to the bottom of the page and click on “Save & Apply” button to save the changes.

Please remember Pair Connection Master’s IP address (i.e. SW550X’s IP address on your desired network
interface (either Ethernet or Wi-Fi)) and Local Port number here in order to enter these information in
another SW550X device with the Pair Connection Slave setting later.

Proceed to the Paragraph below to configure a Pair Connection Slave to connect to this Master.
SW5501 – SW5502
Wireless Serial Server
5.2.6
User Manual
Link modes and
Applications
TCP Client Application: Configure SW550X as a Pair Connection Slave
A Pair Connection Slave application is configured for SW550X under TCP Client Link. It is necessary to pair up with
a Pair Connection Master as described in previous section. Please setup a Pair Connection Master on another
SW550X device first before proceeding. Please follow the following steps to enable Pair Connection application
and set this SW550X device as Slave in TCP Client Link Mode.
Figure 5.14
Pair Connection Slave Application in TCP Client Link Mode

Follow steps in Paragraph 5.1.2 above to configure SW550X in TCP Client Link Mode properly.

Click on the drop-down list of the Application option under TCP Client section and switch to “Pair
Connection Slave” to enabled Pair Connection application in SW550X.

Enter the Destination IP address and the Destination Port number (for Destination 1 and (optionally
Destination 2)) that match to the settings of Pair Connection Master (another SW550X device)’s IP and
port number that were setup previously.

Scroll down to the bottom of the page and click on “Save & Apply” button to save the changes.
5.2.7
TCP Server Application: Enable Reverse Telnet
Reverse Telnet application is useful if a Telnet program is used to connect to SW550X and the serial interface of
the SW550X is connected to a Terminal Server. Telnet programs in Windows/Linux operating systems require
special handshaking to get the outputs and the character formatting to show properly. SW550X will interact with
those special commands (such as CR/LF commands) if Reverse Telnet is enabled. Figure 5.15 shows a
configuration of Reverse Telnet application in the TCP Server Link Mode. Note that the Reverse Telnet application
is only available when SW550X is configured as TCP Server Link Mode. Please follow the following steps to enable
Reverse Telnet application under the TCP Client Link Mode.
SW5501 – SW5502
Wireless Serial Server
Figure 5.15
User Manual
Link modes and
Applications
Reverse Telnet Application in TCP Server Link Mode

Follow steps in Paragraph 5.1.1 above to configure SW550X in TCP Server Link Mode properly.

Click on the drop-down list of the Application option under TCP Server section and switch to “Reverse
Telnet” to enabled reverse telnet application in SW550X.
Scroll down to the bottom of the page and click on “Save & Apply” button to save the changes.
5.2.8
UDP Application: Multi-Point Pair Connection
It is also possible to setup pair connection application in UDP Link Mode to have more than one Pair Connection
Master or Slave to communicate with each other. For example, it is possible to setup one Modbus Master and six
Modbus Slaves in UDP Link Mode. Figure 5.16 shows an example of one Modbus Master serially connected to a
SW550X, which is a Pair Connection Master in UDP Link Mode, while four other SW550Xs are serially connected to
one or two Modbus Slaves and configured as Pair Connection Slaves in UDP Link Mode. Note that all SW550X
devices are communicated over the same wireless network. Note again that UDP does not guarantee data delivery
and only data would be transmitted over Ethernet or Wi-Fi networks while other serial pings are not transmitted. If
RS-232 data along with its flow control pin data are required to be exchanged over the network (as if COM interfaces
of these devices were connected without SW550X), it is recommended to use Multi-Point Pair Connection using
TCP, please see detail in Paragraph 5.2.10 below. To configure Multi-Point Pair Connection in UDP Link Mode,
please see an example and set the required parameters of each SW550X in Table 5.1 using the steps described in
Paragraph 5.1.3 above.
Note: the destination IP addresses and port numbers of the slaves need to be equal to the master’s IP address and port number. Local listening
port numbers of the slaves need to be equal to the master’s destination port number. Please see Table 5.1 for an example.
SW5501 – SW5502
Wireless Serial Server
Figure 5.16
Link modes and
Applications
User Manual
An Example of Network Topology for Multi-Point Pair Connection in UDP Link Mode
Table 5.1 An Example of Multi-Point Pair Connection’s Parameter Settings for UDP Link Mode
IP Address
Link Mode
Local
Listening Port
SW5501 Master COM1
10.0.50.100
UDP
5000
SW5502 Slave 1 COM1
SW5502 Slave 1 COM2
SW5502 Slave 2 COM1
SW5502 Slave 2 COM2
SW5501 Slave 3 COM1
SW5501 Slave 4 COM1
10.0.50.200
10.0.50.200
10.0.50.201
10.0.50.201
10.0.50.202
10.0.50.203
UDP
UDP
UDP
UDP
UDP
UDP
5000
5001
5000
5001
5000
5000
Destination IP
Destination
Port
10.0.50.200~10.0.50.203
10.0.50.200~10.0.50.201
10.0.50.100
10.0.50.100
10.0.50.100
10.0.50.100
10.0.50.100
10.0.50.100
5000
5001
5000
5001
5000
5001
5000
5000
SW5501 – SW5502
Wireless Serial Server
5.2.9
Link modes and
Applications
User Manual
TCP Server Application: Multiple TCP Connections
The multiple connection option will allow up to the maximum of four TCP Client connections. This can be enabled
by changing the Maximum Connection option under the TCP Server section in TCP Server Link Mode settings.
Note that it is also possible to use this multiple connection feature in conjunction with other TCP Server
applications, such as Virtual COM, Pair Connection, and Reverse Telnet. For example, enabling multiple connection
option along with Pair Connection will result in Multi-Point Pair Connection in TCP Server Link Mode (Paragraph
5.2.10 below). For more information on response behavior option please go to Paragraph 5.1.1 above.
Figure 5.17
5.2.10
Setting of Multiple TCP Connection Application via Maximum Connection Option
TCP Server Application: Multi-Point TCP Pair Connections
The difference between Multi-Point TCP Pair Connection and Multi-Point UDP Pair Connection is that the TCP
implementation would also exchange flow control pins for RS-232 as if COM interfaces of these devices are
connected without SW550X. However, the TCP Server is limited to a maximum of four connections. If there are four
serial devices and they don’t use flow control pins with RS-232 or RS-485, it is possible to setup pair connection in
UDP Link Mode as discussed in Paragraph 5.2.8 above. After multiple connection option is enabled in the Web UI
as described in previous sub-section, please refer to Table 5.2 for an example to setup Multi-Point TCP Pair
Connections as depicted in the figure below. Please follow the steps for Pair Connection Master with TCP Server
Link Mode settings and Pair Connection Slave with TCP Client Link Mode settings as described in Paragraph 5.2.5
above and Paragraph 5.2.6, respectively.
Table 5.2 An Example of Multi-Point Pair Connection’s Parameter Settings for TCP Link Mode
SW5501 Master COM1
SW5502 Slave 1 COM1
SW5502 Slave 1 COM2
SW5501 Slave 2 COM1
SW5501 Slave 3 COM1
IP Address
Link Mode
Application
10.0.50.100
10.0.50.200
10.0.50.200
10.0.50.201
10.0.50.202
Listening
Port
TCP Server
TCP Client
TCP Client
TCP Client
TCP Client
Pair Connection Master
Pair Connection Slave
Pair Connection Slave
Pair Connection Slave
Pair Connection Slave
4660
-
Destination IP
10.0.50.100
10.0.50.100
10.0.50.100
10.0.50.100
Destinati
on Port
-
4660
4660
4660
4660
SW5501 – SW5502
Wireless Serial Server
Figure 5.18
5.3
User Manual
Link modes and
Applications
An Example of Network Topology for Multi-Point Pair Connection in TCP Link Mode
Wireless Topology
This section will describe example applications of wireless topologies and their corresponding wireless parameter
settings for SW550X. Typically, IEEE 802.11 wireless network standards will support two wireless network
topologies: ad-hoc and infrastructure modes.
In Ad Hoc mode, each wireless node will communicate directly with each other and have equal role in
communication in which they are usually called peer.
On the other hand, in infrastructure mode, there will be one or more access points which will control the network
and how other wireless nodes communicate with each other. Each wireless node will be called wireless client. In
Infrastructure mode, each wireless node cannot communicate directly with each other. They must communicate
via the access point only.
We can configure SW550X as a wireless ad-hoc peer or a wireless client in infrastructure mode. Note that SW550X
cannot be operated as an access point in infrastructure mode. If you require an access point, please consider a
deployment of Atop’s AW5500 series. Atop recommends the user to utilize the strongest wireless security measure
as described in the following subsections.
5.3.1
Configure SW550X as a Wireless Ad-Hoc Peer
To configure SW550X as an ad-hoc peer, please click on Basic Settings page under the Wireless menu and follow
steps in Paragraph 4.2.1 above . Figure 5.19 shows an example of a wireless ad-hoc peer in IEEE 802.11b network
with open authentication and no encryption. However, Atop recommends that you should enable the security
mechanism using the Wire Equivalent Privacy (WEP) with 128-bit encryption key as summarized in Table 5.3.
SW5501 – SW5502
Wireless Serial Server
User Manual
Figure 5.19
Link modes and
Applications
Wireless Ad-Hoc Peer Settings for SW550X
Table 5.3 Summary of Parameter Settings for Wireless Ad-Hoc Peer with WEP Security
Topology
Band Mode
Tx Rate
Channel
Authentication
Encryption
WEP Key
Adhoc
802.11b (alternatively you could use 802.11a which is less affected by interference), it provides
better wireless sensitivity with lower maximum rate at 11Mbps.
Auto
1; we recommend using 1, 6, or 11 (for 2.4 GHz).
Open
WEP
For 64-bit encryption, enter 5 ASCII value or 10 Hexadecimal digits. For 128-bit encryption, enter
13 ASCII value or 26 Hexadecimal digits. Use 128-bit when possible.
SW5501 – SW5502
Wireless Serial Server
5.3.2
User Manual
Link modes and
Applications
Configure SW550X as a Wireless Client in the Infrastructure mode (PSK)
To configure SW550X as a Wireless Client in infrastructure mode with WPA2-PSK authentication mode and AES
encryption, please click on Basic Settings page under the Wireless menu and follow steps in Paragraph 4.2.1
above. The screenshow shows an example of a wireless client in infrastructure mode with these security
mechanisms enabled as summarized in
SW5501 – SW5502
Wireless Serial Server
User Manual
Link modes and
Applications
Table 5.4.
Figure 5.20
Wireless Client with WPA2-PSK Security Settings for SW550X
SW5501 – SW5502
Wireless Serial Server
User Manual
Link modes and
Applications
Table 5.4 Summary of Parameter Settings for Wireless Client in Infrastructure Topology with WPA2-PSK
Security
Topology
Band Mode
Tx Rate
Channel
Authentication
Encryption
WPA2-PSK passphrase
Infrastructure
Auto
Auto
Disabled (auto sensing)
As defined by the Access Point
As defined by the Access Point
8~63 characters
Attention
We recommend using WPA2-PSK authentication with AES encryption as it is
the most secure password-type security option without utilizing 802.1x.
5.3.3
Click-2-Go
It is possible to pair up two SW550X devices in Ad-Hoc mode or have them connect to AW5500 (Infrastructure)
automatically without entering the Web UI. Please refer to Device Management’s manual for more details on this.
SW5501 – SW5502
Wireless Serial Server
5.3.4
User Manual
Link modes and
Applications
Configure SW550X as a Wireless Client in the Infrastructure mode (PEAP-MSCHAPv2)
To configure SW550X as a Wireless Client in infrastructure mode with PEAP-MSCHAPv2 authentication mode and
AES encryption, please click on Basic Settings page under the Wireless menu and follow steps in Paragraph 4.2.1
above. Figure below shows an example of a wireless client in infrastructure mode with this authentication mode
enabled as summarized in Table 5.5.
Figure 5.21
Wireless Client with PEAP Security Settings for SW550X
Table 5.5 Wireless Client-Infrastructure Topology Parameters with WPA2 (PEAP-MSCHAPv2) Security.
Topology
Band Mode
Tx Rate
Channel
Authentication
Encryption
Username
Password
Infrastructure
Auto
Auto
Disabled (auto sensing)
WPA2 (PEAP)
As defined by the Access Point
Defined by the RADIUS Server
Defined by the RADIUS Server
SW5501 – SW5502
Wireless Serial Server
User Manual
VCOM installation
and troubleshooting
6 VCOM installation and troubleshooting
6.1
Enabling VCOM
SW550X will encapsulate control packets on top of the actual serial data when Virtual COM (VCOM) Application is
enabled. This will allow the Virtual COM port in the Windows/Linux system to access SW550X’s COM ports. Please
note that Virtual COM Application can only be enabled in TCP Server Link Mode as shown in Figure 6.1 or TCP
Client Link Mode as shown in Figure 6.2.
Figure 6.1
Enabled Virtual COM Application in TCP Server Link Mode
Figure 6.2
Enabled Virtual COM Application in TCP Client Link Mode
SW5501 – SW5502
Wireless Serial Server
User Manual
VCOM installation
and troubleshooting
Virtual COM on host computer allows remote access of serial devices over TCP/IP networks through Serial/IP
Virtual COM ports that work like local native COM ports. Figure 6.3 is an example of Virtual COM application
diagram. In the diagram, multiple serial servers (i.e. SW550X devices) in which each one connects to serial device
are connected over an Ethernet hub. Their serial devices can be accessed through the TCP/IP network of the hub.
Note that there are only two Physical COM ports (COM 1 and COM 2) on the personal computer (PC) while there
can be several Virtual COM ports such as COM 3, 4, 5, and so on. In SW550X case, the TCP/IP network can be either
wired network such as Ethernet or wireless network such as Wi-Fi (IEEE 802.11).
Figure 6.3
An Example Diagram of Virtual COM Application over TCP/IP Network
To enable Virtual COM on host computer, you will require a software utility or VCOM driver software to emulate
the COM port. For Windows operating system, a software utility called Serial/IP is supported by Atop to be used
for this purpose. Please see discussion about the VCOM driver utility in the following subsections.
6.1.1
VCOM Driver Setup
The supported VCOM driver or Serial/IP utility has the following requirements.
System Requirements

Windows Operating System Supported Platform (32/64 bits)


Win8
Win7
SW5501 – SW5502
Wireless Serial Server
User Manual







2008
Vista
XP
2003 (also Microsoft 2003 Terminal Server)
2000 (also Microsoft 2000 Terminal Server)
NT (also Microsoft NT Terminal Server)
4.0

9x
VCOM installation
and troubleshooting

Citrix MetaFrame Access Suite

Linux operating system, also available but first you might need to download a separate package called Virtual
COM driver for Linux (TTYredirector) available for download on Atop Website or in the product CD. The zipped
package includes a binary file for installation and a manual for Linux systems.
6.1.2
Limitation
The Virtual COM driver allows up to 256 Virtual COM ports in a single PC. Selection of COM port number can be
allowed in the range from COM1 to COM4096. Note that COM ports that are already occupied by the system or
other devices will not be available.
6.1.3
Install
Run the Virtual COM setup file included in the CD or download a copy from our website to install the Virtual COM
driver for your operating system. Please turn off your anti-virus software and try again if the installation fails. At the
end of the installation, please select at least one Virtual COM port from the Serial/IP Control Panel.
6.1.4
Uninstall
1) From Windows Start Menu select Control Panel then select Add/Remove Programs.
2) Select Serial/IP Version x.x.x in the list of installed software.
3) Click the Remove button to remove the program.
SW5501 – SW5502
Wireless Serial Server
User Manual
VCOM installation
and troubleshooting
Enable VCOM in Serial Device Servers and Select VCOM in Windows
6.2
This section will provide the procedure to enable Virtual COM (VCOM) on SW550X and Windows based PC. Please
follow the steps described here to configure your Virtual COM application.
6.2.1
Enable VCOM in Serial Device Servers
Enable Virtual COM in our serial device servers (i.e. SW550X) by logging into our Web UI. It is located under COM
1 or COM 2 configuration under Serial menu as described in Section 4.5 above. Screenshot below shows how to
enable Virtual COM in TCP Server Link Mode in SW550X. For a detail of Link Mode configuration with Virtual COM,
please refer to the previous chapter starting from Section 5.1 above on Link Mode configurations.
Figure 6.4
6.2.2
Enable Virtual COM Application for COM 2 in TCP Server Link Mode
Running Serial/IP Software Utility in Windows
After installation of Virtual COM driver on Windows operating system as described in Paragraph 6.1.3 above,
open Serial/IP Control Panel by following any one of these methods:
1) Click on Windows’ Start menu → Select All Programs → Select Serial/IP → Select Control Panel.
2) In the Windows’ Control Panel, open the Serial/IP applet.
3) In the Windows notification area as shown in Figure 6.5, right click on the Serial/IP tray icon and click on
Configure… menu to open the Serial/IP’s Control Panel.
SW5501 – SW5502
Wireless Serial Server
User Manual
Figure 6.5
VCOM installation
and troubleshooting
Serial/IP Tray Icon on Windows Notification Area
If no Virtual COM port is selected, a “Select Ports” dialog window will pop up and ask the user to select at least one
COM port as the Virtual COM port before proceeding as shown in the pop-up window below. You can select a COM
port by checking the box in front of the list of virtual COM ports. Note that if a COM port number is not on the list,
it may be used by other application or your operating system. The user may want to select a range of multiple COM
ports to be used as Virtual COM ports by entering the range of COM port in the text box below the list. After selecting
the virtual COM ports, please click OK button to proceed.
Figure 6.6
A Pop-up Window for Selecting Virtual COM Ports
After at least one Virtual COM port is selected, the Serial/IP Control Panel window will show up as illustrated in
Figure 6.7. The left side of the Control Panel window shows the list of selected Virtual COM ports. You can click
on Select Ports… button below the list to add or remove Virtual COM ports from the list. The right side of the
Serial/IP Control Panel window shows the configurations of the selected Virtual COM port marked in blue on the
SW5501 – SW5502
Wireless Serial Server
User Manual
VCOM installation
and troubleshooting
list. Each Virtual COM port can have its own settings. Details on how to configure the Virtual COM port will be
described in the next subsection.
Note: The changes to Virtual COM ports apply immediately so there is no need to save the settings manually. However, if the Virtual COM port
is already in use, it is necessary to close the Virtual COM port and open it after the TCP connection closes completely in order for the changes
to take effect.
Figure 6.7
6.2.3
Serial/IP Control Panel Window
Configuring VCOM ports
For each VCOM port selected on the listed on the left-hand side of the Serial/IP Control Panel, you can use the
following procedures to configure that VCOM port.
1. If the serial device server (i.e. SW550X) is running in TCP Server Link Mode (recommended), the Serial/IP
utility on the host computer should be configured as the TCP Client connecting to the serial device server.
Enable Connect to Server option (by checking the box in front of it as shown in Figure 6.8) and enter the
IP Address of the serial device server with the specified Port Number. The Port Number here is the Local
Listening Port for the serial device server which is specified in the Local Port field of Figure 6.4.
2. If the serial device server (i.e. SW550X) is running in TCP Client Link Mode, the Serial/IP utility on the host
computer should be configured as the TCP Server waiting for a serial device server to connect to the host
computer. Enable Accept Connections option (by checking the box in front of it) and enter the specified
Port Number. This Port Number is the Destination Port of the serial device server. Do not enable Connect
to Server option and Accept Connections option simultaneously.
SW5501 – SW5502
Wireless Serial Server
User Manual
Figure 6.8
3.
VCOM installation
and troubleshooting
Configuring Virtual COM 2 Port as TCP Client
Under User Credentials box, you can enable Use Credentials From: option by checking the box in front
of it then select options from the drop-down list. The available sources of credentials are: Windows
Credentials, Prompt on COM Port Open, Prompt at Login, and Use Credentials Below. If you select Use
Credentials Below option as shown in Figure 6.8, please specify the Username and the Password in
their corresponding text boxes.
4.
Under COM Port Options box, you can enable Restore Failed Connections option by checking the box
in front of it to force Virtual COM to automatically restore failed connections with the serial device
server in case of unstable network connections.
5.
To test the Virtual COM connection, you can click the Configuration Wizard… button and then click the
Start button in the pop up window as shown in Figure 6.9. If the test passes, all checks under the Status
text box should be green. In this Configuration Wizard window, you can change the IP Address of
Server, Port Number, Username (if Use Credential option is enabled), and Password (if Use Credential
option is enabled). To apply the changes in the Configuration Wizard window to the Serial/IP Control
Panel, please click on Use Settings button at the bottom of the window in Figure 6.9. You can also click
on Copy button to copy the results to the PC system clipboard.
6.
To transfer the settings between Virtual COM ports, click on the Copy Settings To button as shown in
Figure 6.8.
SW5501 – SW5502
Wireless Serial Server
User Manual
Figure 6.9
Configuration Wizard Window for COM 1
VCOM installation
and troubleshooting
SW5501 – SW5502
Wireless Serial Server
User Manual
VCOM installation
and troubleshooting
Exceptions
6.3
This section lists possible exceptions which may occur when the user tested the VCOM connection through the
Configuring Wizard… button. If there is a problem with the connection, there will be error(s) or warning(s) reported
in the Status and Log text boxes. The possible correction or trouble shooting hint for each exception is given in
each case.

If the status reports with an exclamation mark with a message “Warning: timeout trying x.x.x.x” as shown
below, please recheck or correct the VCOM IP address and Port number configuration or the PC’s network
configuration.
Figure 6.10
Timeout Warning on VCOM Connection
SW5501 – SW5502
Wireless Serial Server

User Manual
If the status reports with a check with a message “Raw TCP Connection Detected” and an exclamation
mark with a message “Client not licensed for this server” as shown in Figure 6.11. Please enable the
Virtual COM option in the serial device server.
Figure 6.11

VCOM installation
and troubleshooting
Error of Client not licensed for this server
If the status reports with a check with a message “Telnet Protocol Detected” and an exclamation mark
with a message “Client not licensed for this server” as shown in below. This means that there is a licensing
issue between the serial device server (i.e. SW550X) and the Serial/IP Utility Software. Please contact Atop
technical support to obtain the correct VCOM software.
Figure 6.12
Licensing Issue of Serial/IP Utility Software
SW5501 – SW5502
Wireless Serial Server

User Manual
VCOM installation
and troubleshooting
If the status reports with an exclamation mark with a message “Server requires username/password login”
as shown in Figure 5.13. This means that the VCOM Authentication option in the serial device server (i.e.
SW550X) is enabled but the User Credentials option in the Serial/IP utility software is not enabled. Please
follow the step in Paragraph 6.2.3 above for enabling the user credentials option and entering the username
and the password.
Figure 6.13

VCOM Authentication failed due to Missing Username/Password
If the status reports with an exclamation mark with a message “Username and/or password incorrect” as
shown in Figure 6.14. This means that the wrong username and/or password were entered and the
authentication process failed.
Figure 6.14
VCOM Authentication failed due to incorrect Username and/or Password
SW5501 – SW5502
Wireless Serial Server

User Manual
VCOM installation
and troubleshooting
If the status reports with an exclamation mark with a message “No login/password prompts received from
server” as shown in Figure 6.15. This means that the User Credentials option in the Serial/IP utility software
is enabled but the VCOM Authentication option in the serial device server (i.e. SW550X) is not enabled.
Please enable the VCOM Authentication option on the SW550X by setting a new and non-blank
administrator’s Username and Password for SW550X as described in Paragraph 4.9.2 above. Note that
the Username and the Password for VCOM authentication are the same username and password of
SW550X Web UI login. The default account, which has the username as “admin” and no password or blank
password, is considered as an unsecured account or no authentication option.
Figure 6.15
VCOM Authentication failed due to disabled VCOM Authentication on SW550X
SW5501 – SW5502
Wireless Serial Server
User Manual
VCOM installation
and troubleshooting
Using Serial/IP Monitor
6.4
Serial/IP Port Monitor is another utility software provided for Atop’s user. It allows user to monitor the activities or
status of Virtual COM port and display the exchanged serial message which is called trace over the port.
6.4.1
Opening the Port Monitor
The Serial/IP Port Monitor utility can be opened by one of the following methods:
 Click on Windows’s Start menu → Select All Programs → Select Serial-IP → Select Port Monitor.
 Double click the Serial/IP tray icon in the Windows’ notification area.
 In the Windows’ notification area, right click on the Serial/IP tray icon and click on Port Monitor to open the
Port Monitor.
Click on the Port Monitor button in the Serial/IP Control Panel’s window.
6.4.2
Activity Panel
The Activity panel provides a real-time display of the status of all Serial/IP COM ports as shown below. If the Virtual
COM Port is opened and is properly configured to connect to a serial device server (i.e. SW550X), the status would
be Connected. If Serial/IP utility software cannot find the specified serial device server, the status would be Offline.
Figure 6.16
Activity Panel of Serial/IP Port Monitor
Each column in the Activity Panel is described as follows:
 Port: This is the virtual COM port number.
 Line signal indicators: Red color means no activity while green color indicates activity.
o TD indicates data are being sent to the server.
o RD indicates data are being received from the server.
SW5501 – SW5502
Wireless Serial Server
User Manual
VCOM installation
and troubleshooting
TR (DTR) is the signal from the application to the server that the application has opened the
virtual COM port. The most common use of DTR is to programmatically lower it to signal a
modem to disconnect.
o DR (DSR) is the signal from the server to the application that a modem or serial device is
connected to the server and ready to communicate.
o CD (DCD) is the signal from the server to the application that a modem has successfully
negotiated a connection with another device.
Status: This indication the connection status of the software and serial device server which can be
connected or offline.
IP Address: This is the IP address of the serial device server.
o


Notes:

The line signal indicators appear only when the virtual COM port is currently opened by an application.

The TR, DR, and CD indicators appear only if the COM Port Control protocol is being used or if the COM
port options are enabled.
6.4.3
Trace Panel
The Trace panel provides a detailed, time-stamped, real-time display of all Serial/IP COM ports operations. Click on
Enable Trace box to start logging Virtual COM communication. To stop logging, uncheck the Enable Trace box.
The user can toggle the format of the display between ASCII text (more readable) and hexadecimal format (most
detailed) by checking the Hex Display box. Click on Auto Scroll box will cause the display to show the most recent
trace data continuously. To ensure that Port Monitor’s window is always on top of other application’s windows,
please check the Always on Top box. If you want to clear the displayed data in Trace panel, click on the Clear
button.
Figure 6.17
Trace Panel of Serial/IP Port Monitor
The pull-down menu of the Port Monitor windows allows the user to save the log and customize the capturing data
of serial communication.
SW5501 – SW5502
Wireless Serial Server


User Manual
VCOM installation
and troubleshooting
File: To save the log file which you can send the log to Atop for further analysis if problems occurs with the
Virtual COM connection, please click on File menu then click Save As.
Trace Options:
o Select Ports to Capture…: This menu allows you to reduce the number of ports that are being
traced to a subset of all configured Virtual COM ports. This feature can reduce the impact of tracing
on memory and system performance for large applications.
o Select Ports to Display…: This menu allows you to reduce the number of ports that appear in the
display to a subset of the ports being captured. For large applications, this feature provides a way
to focus on ports of interest among all those being captured.
o Buffer Size: This menu allows the change on the amount of RAM being used for tracing which can
be normal or large.
o System Debug Output: This menu allows user to enable the sending of trace data to the system
debug channel and optionally put a label on them.
The Trace panel shows one serial event per line and in time order. Every event begins with a time tag. The transmit
events will be shown in green and preceded by "»" while the receive event will be shown in red and preceded by "«".
The control events will be shown in blue and preceded by “|”.
Notes:
The Trace display covers up to 512k bytes of event data which is enough to cover a reasonably extensive tracing
session. However, if the limit is reached, the trace clears and starts over.
SW5501 – SW5502
Wireless Serial Server
User Manual
VCOM installation
and troubleshooting
Serial/IP Advanced Settings
6.5
In the Serial/IP Control Panel, you can click on the Advanced… button to open Serial/IP Advanced Settings window.
The Serial/IP Advanced Settings window contains two tabs: Options and Proxy Server. On the Options tab, you can
click on Use Default Settings button to load the default settings. Detail description of each options and how to set
a proxy server will be explained in the following subsections.
Figure 6.18
6.5.1
Serial/IP Advanced Settings Window
Advanced Settings Options
Under the Options tab, you can enable a number of advanced settings and enter required parameters for Serial/IP
software. Description of each option is provided as follows.

Extend Server Connection: When enabled, this option maintains the TCP connection for specified amount of
time after COM port is closed. The default time value is 8000 milliseconds.

Attempt Server Connection: When enabled, this option terminates pending connection attempts if they do
not succeed in the specified time. The default time value is 2000 milliseconds.

Synchronize with Server Upon COM Port Open: This option is required by Windows NT Operating Systems
(also for Windows 2000, XP, Vista, 7).

Update Routing Table Upon COM Port Open: When enabled, this option maintains IP route to a server in a
different subnet by modifying the IP routing table.

Enable Nagle Algorithm: When enabled, this option provides better network efficiency by imposing a minor
latency on the data stream (TCP connection) while it waits to fill network packets.

Always Limit Data Rate to COM Port Baud Rate: When enabled, this option limits the data rate to the baud
SW5501 – SW5502
Wireless Serial Server
User Manual
VCOM installation
and troubleshooting
rate that is in effect for the virtual COM port.

Include Domain in Windows Credentials: If credential option is set to Windows Credentials (See option in
Paragraph 6.2.3 above) and this option is enabled, VCOM automatically adds the current Windows domain to
the username.

COM Port Control Keep-Alive: This option controls the interval at which VCOM will issue the keep-alive
message. If the value is set to zero, there will be no activity or no keep-alive packet sending out. The default
value is 60000 milliseconds.

Maximum Connection Recovery Interval: This option controls the maximum time for restoration of failed
connection. The default value is 30000 milliseconds.
Enable SETXON/SETXOFF COM Port Commands: This option enables additional negotiation on SETXON and
SETXOFF commands and is only available for the “V” series serial device servers. If the application requires
SETXON/SETXOFF feature, please contact Atop Technical Support.
6.5.2
Using Serial/IP with a Proxy Server
The Serial/IP Redirector also supports TCP network connections made through a proxy server, which may be
controlling access to external networks (such as the Internet) from a private network that lacks transparent IPbased routing, such as Network Address Translation (NAT). You can enable Serial/IP support of Virtual COM port
through the proxy server using Serial/IP Proxy Server settings. You can find Proxy Server settings from the
Advanced Settings windows and click on the Proxy Server tab as shown below. To enable the use of proxy server,
check the box in front of Use a Proxy Server option. Then, select the Protocol Type which can be HTTPS or Socks
V4 or Socks V5 from a drop-down list. Then, enter the IP address of the proxy server in the text box under IP Address
of Server field and specify the Port Number. Note that the default port number for HTTPS is 8080, while for Socks
V4 and V5 is 1080. Optionally, you can enter the Username and Password which may be required by your proxy
server in the Login to Server Using box. Alternately, you can click on the Auto Detect button to have the software
automatically detect the proxy server settings for you. Finally, you can test the proxy server settings by clicking on
the Test button and stop the testing by clicking on Stop button.
Figure 6.19
Proxy Server Tab under Serial/IP Advanced Settings
SW5501 – SW5502
Wireless Serial Server
User Manual
Specifications
7 Specifications
Hardware Specifications
7.1
7.1.1
Models of SW550X Series
Table 7.1 SW550X series and their interfaces
Name
7.1.2
SW5501
SW5501-TB
SW5501-Sis
DB9
1
---
SW5502
SW5502-TB
SW5502-Sis
1
---
Serial Port
TB5
-1
---
TB5(ISO)
---
1
--
1
--1
Ethernet
RJ45
1
1
1
1
1
1
Physical Characteristics
Table 7.2 Physical Characteristics of SW550X Series
Front-Panel
Housing
IP30 protection,
SPCC case
7.1.3
Common ID design
Weight
500g
(approx.)
Dimensions
47 mm x
110 mm x
90mm
Installation


DIN-Rail
Wall mount (optional kit)
LED Indicators
Table 7.3 Descriptions of LED Status Indicators
Name
COM
LAN
Color
Green
Orange
Green
WLAN
Green
RUN
Green
Status
Blinking
Off
Blinking
On
Off
Blinking
On
Blinking
Off
Off
Blinking Steadily
Blinking Rapidly
Description
Data is transmitting on the serial port
Data is not transmitting on the serial port
Ethernet is connected on 10Mbps
Ethernet is connected on 100/1000Mbps
Ethernet is disconnected
Data is transmitting on Ethernet port
Wireless radio is enabled
Wireless radio is enabled and data is transmitting
Wireless Radio is disabled (Mode LEDs should also disable)
System is not powered on
AP firmware is running normally
AP firmware is not running
SW5501 – SW5502
Wireless Serial Server
7.1.4
User Manual
Specifications
Signal LEDs
Symbols of LED’s Status
○ Off
● On
☼ blinking
Table 7.4 Interpretation of SW550X’s Operation via Front Panel LEDs
Operations
Connecting
Connected
7.1.5
Searching for an AP
Cannot connected to the AP
No IP provided by the DHCP Server
Signal Strength is less 20%
Bad Signal Strength (20%-40%)
Poor Signal Strength (40%-60%)
Fair Signal Strength (60%-80%)
Good Signal Strength (80%-94%)
Excellent Signal Strength (95%-100%)
Status
☼
☼
☼
●
●
●
●
●
●
LED1
☼
LED2
☼
LED3
☼
LED4
☼
LED5
☼
●
●
●
●
●
●
●
●
●
●
☼
●
●
●
●
●
Dip Switch (SW5501)
Table 7.5 Dip Switch Functions of SW5501
COM
Dip
Function
3
Pull High
2
Pull Low
1
Termination
COM1
7.1.6
SW
On
Off
On
Off
On
Off
Ω
1K
100K
1K
100K
120
0
Dip Switch (SW5502)
Table 7.6 Dip Switch Function of SW5502
COM
COM1
COM2
Dip
Function
6
Pull High
5
Pull Low
4
Termination
3
Pull High
2
Pull Low
1
Termination
SW
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
Ω
1K
100K
1K
100K
120
0
1K
100K
1K
100K
120
0
SW5501 – SW5502
Wireless Serial Server
7.1.7
User Manual
Specifications
Wireless Specifications
Table 7.7 Wireless Interface Specification of SW550X Series
PCI-e Module
Tx/Rx
2T2R MIMO (2x2
with MCS 0-15)
Atheros AR9382
7.1.8




Wireless Standard
Conformance
802.11a
802.11b
802.11g
802.11n
Antenna


3/5 dBi Dual antenna design
SMA(R) Female connector
Frequency Range:
Table 7.8 Operating Frequencies in Different Regions at 2.4GHz and 5GHz
United States (FCC)
Europe (ETSI)
Taiwan (NCC)
7.1.9
2.4Ghz
2412-2462(20Mhz)
2422-2452(40Mhz)
2412-2472(20Mhz)
2422-2462(40Mhz)
2412-2462(20Mhz)
2422-2452(40Mhz)












5Ghz
5180-5240, 5745-5825(20Mhz)
5190-5230, 5755-5795(40Mhz)
5180-5240(20Mhz)
5190-5230(40Mhz)
5280-5320, 5745-5825(20Mhz)
5310, 5755-5795(40Mhz)
Data Rate:
Table 7.9 Supported Data Rate for Wireless Interface under IEEE 802.11 Standards
802.11a
802.11b
802.11g
802.11n
6, 9, 12, 18, 24, 36, 48, 54Mbps
1, 2, 5.5 and 11Mbps
6, 9, 12, 18, 24, 36, 48, 54Mbps

1Nss: 65Mbps @ 800GI, 72.2Mbps @ 400GI (Max.)
20 MHz

2Nss: 130Mbps @ 800GI, 144.4Mbps @ 400GI (Max.)
40MHz


1Nss: 135Mbps @ 800GI, 150Mbps @ 400GI (Max.)
2Nss: 270Mbps @ 800GI, 300Mbps @ 400GI (Max.)
SW5501 – SW5502
Wireless Serial Server
7.1.10
User Manual
Specifications
Output Power
Table 7.10 Maximum Output Power of Wireless Interface under IEEE 802.11Standards
802.11a
802.11b
802.11g
802.11n 2.4GHz/HT20
802.11n 2.4GHz/HT40
802.11n 5GHz/HT20
802.11n 5GHz/HT40
7.1.11
+15dBm @ 6, 9, 12, 18, 24Mbps
+15dBm @ 36Mbps
+12dBm @ 54Mbps
+14dBm
+17dBm @ 6, 9, 12,18,24Mbps
+17dBm @ 36Mbps
+16dBm @ MCS 0/8
+16dBm @ MCS 1/9
+16dBm @ MCS 2/10
+16dBm @ MCS 3/11
+15dBm @ MCS 0/8
+15dBm @ MCS 1/9
+15dBm @ MCS 2/10
+15dBm @ MCS 3/11
+15dBm @ MCS 0/8
+15dBm @ MCS 1/9
+15dBm @ MCS 2/10
+15dBm @ MCS 3/11
+14dBm @ MCS 0/8
+14dBm @ MCS 1/9
+14dBm @ MCS 2/10
+14dBm @ MCS 3/11
























+14dBm @ 48Mbps
+12dBm @ 54Mbps


















+16dBm @ 48Mbps
+16dBm @ 54Mbps
+16dBm @ MCS 4/12
+16dBm @ MCS 5/13
+16dBm @ MCS 6/14
+15dBm @ MCS 7/15
+15dBm @ MCS 4/12
+15dBm @ MCS 5/13
+15dBm @ MCS 6/14
+14dBm @ MCS 7/15
+15dBm @ MCS 4/12
+11 - 14dBm @ MCS 5/13
+9 - 12dBm @ MCS 6/14
+7 - 10dBm @ MCS 7/15
+14dBm @ MCS 4/12
+10– 13dBm @ MCS 5/13
+8 – 11dBm @ MCS 6/14
+6 – 9dBm @ MCS 7/15
Receiver Sensitivity
Table 7.11 Receiver Sensitivity of Wireless Interface under IEEE 802.11 Standards
Standard
802.11a
802.11b
802.11g
Data
Rate
6M
9M
12M
18M
24M
36M
48M
54M
1M
5.5M
11M
6M
IEEE Spec
(1 Rx dBm)
-82
-81
-79
-77
-74
-70
-66
-65
not specified
not specified
not specified
-82
Typical/Maximum
(2Rx dBm)
-95/-85
-94/-84
-93/82
-90/-80
-88/-77
-84/-73
-82/-69
-81/-68
-98/-85
-98/-85
-94/-85
-96/-85
SW5501 – SW5502
Wireless Serial Server
Standard
802.11a/n
HT20
802.11a/n
HT40
802.11b/g/n
HT20
802.11b/g/n
HT40
User Manual
Data
Rate
9M
12M
18M
24M
36M
48M
54M
MCS0
MCS1
MCS2
MCS3
MCS4
MCS5
MCS6
MCS7
MCS0
MCS1
MCS2
MCS3
MCS4
MCS5
MCS6
MCS7
MCS0
MCS1
MCS2
MCS3
MCS4
MCS5
MCS6
MCS7
MCS0
MCS1
MCS2
MCS3
MCS4
MCS5
MCS6
MCS7
IEEE Spec
(1 Rx dBm)
-81
-79
-77
-74
-70
-66
-65
-82
-79
-77
-74
-70
-66
-65
-64
-79
-76
-74
-71
-67
-63
-62
-61
-82
-79
-77
-74
-70
-66
-65
-64
-79
-76
-74
-71
-67
-63
-62
-61
Specifications
Typical/Maximum
(2Rx dBm)
-96/-84
-95/-82
-93/-80
-90/-77
-87/-73
-83/-69
-82/-68
-94/-85
-92/-82
-90/-80
-87/-77
-84/-73
-79/-69
-78/-68
-76/-67
-92/-82
-90/-79
-87/-77
-84/-74
-80/-70
-76/-66
-74/-65
-72/-64
-95/-85
-94/-82
-92/-80
-89/-77
-86/-73
-82/-69
-80/-68
-78/-67
-92/-82
-92/-79
-89/-77
-86/-74
-83/-70
-77/-66
-76/-65
-75/-64
SW5501 – SW5502
Wireless Serial Server
7.1.12
User Manual
Specifications
Security
Supported Wireless Security Mechanisms



64-bit and 128-bit WEP encryption
802.1x authentication
AES and TKIP, WPA/WPA2
7.1.13
Regulatory Requirements
Table 7.12 Conformed Radio Frequency and Electromagnetic Standards








EMC
Radio
EMF
EN 301 489-1 V1.9.2 (2011-09)
EN 301 489-17 V2.2.1 (2012-09)
47 CFR FCC Part 15 Subpart C § 15.247
47 CFR FCC Part 15 Subpart E § 15.407
EN 300 328 V1.8.1 (2012-06)
EN 301 893 V1.7.1 (2012-06)
47 CFR FCC Part 2 Subpart J, section 2.1091
EN 62311:2008 and EN 50385:2002
Table 7.13 Conformed Electrical Standards
Test
IEC61000-4-2
ESD
IEC61000-4-3
RS
IEC61000-4-4
EFT
IEC61000-4-5
Surge
IEC61000-4-6
IEC61000-4-8
IEC61000-4-11
CS
PFMF
DIP
Item
Contact Discharge
Air Discharge
Radiated(Enclosure)
AC Power Port
LAN Port
COM Port
AC Power Port
AC Power Port
LAN Port
COM Port
Conducted(Enclosure)
(Enclosure)
AC Power Port
*AC Ports are tested through an authorized power adaptor.
Value
±8KV
±15KV
10(V/m)
±2.0 KV
±2.0 KV
±2.0 KV
Line-to-Line±1.0 KV
Line-to-Earth±2.0 KV
Line-to-Earth±2.0 KV
Line-to-Earth±2.0 KV
10 V rms
10(A/m)
-
Level
4
4
3
3
4
4
3
3
3
3
3
3
-
SW5501 – SW5502
Wireless Serial Server
7.1.14
User Manual
Specifications
Environmental Limits
 Operating Temperature: -10°C ~60°C (-4°F ~149°F)
 Storage Temperature: -40°C ~85°C (-40°F ~ 185°F)
 Ambient Relative Humidity: 5~95%RH, (non-condensing)
7.1.15
Other
 Safety: UL60950-1/CB, EN60950-1, CNS 14336
 Shock: IEC 60068-2-27
 Freefall: IEC 60068-2-32
 Vibration: IEC 60068-2-6
 MTBF: 20 years (TBD)
 RoHS: Yes
 Maritime: N/A
7.2
Software Specifications
Table 7.14 Software Specifications
Configuration
Protocol
Alert Events
Radio OFF option

Browser (IE8+, Firefox 6+, and Chrome 13+)


Telnet
Device Management© (Atop’s Windows utility)





ICMP
TCP
UDP
DHCP
E-mail





DNS
SNMP
NTP
SMTP
SNMP Trap




HTTP
Telnet
IPv4
802.1x


RADIUS
Syslog
Yes
 Import / Export Configuration from Web with Wireless settings
Other
 Firmware upgrade through Web or Device Management©
 Site Monitor / Site Survey
 LAN / WLAN Bridge (AP Client)
 Management List
SW5501 – SW5502
Wireless Serial Server
User Manual
Emergency System
Recovery
8 Emergency System Recovery
If the device becomes inaccessible and the management utility cannot find the device, please use the following
procedure to recover the devices over Trivial File Transfer Protocol (TFTP).
System Recovery Procedures
System recovery is based on the TFTP Client embedded in the device. It can recover the device from a bad firmware
or other unknown reasons corrupting the firmware image inside the flash memory. Please follow the procedures
below to force SW550X to download a valid firmware from the TFTP Server to recover its operating system.
Default Settings
TFTP Server
TFTP Server Subnet Mask
Name of firmware Image*
10.0.50.201
255.255.0.0
firmware.dld
*This firmware image can be obtained from Atop’s website.






If the device is beeping continuously after power up, this means that the bootloader is damaged and there is
no way to recover it. Please contact Atop directly to obtain RMA number for further solutions.
Obtain and setup a TFTP server on your PC. Make sure that the PC’s network settings are set properly
according to the default setting in the above table.
Rename the firmware image that you obtained from our website to “firmware.dld” and place it in the TFTP
Server’s root directory. For Solarwinds TFTP Server, it is usually C:\TFTP-Root.
Make sure that the device is powered OFF and the Ethernet cable is plugged in.
Press and hold the “reset-to-default” pin next to the Antenna 2 then power ON the device. If the bootloader is
still functioning, the user will hear one long beep followed by two shorter beeps.
Release the reset pin after hearing seven consecutive short beeps. Then, the device will automatically request
files from TFTP Server. Please wait until the device shows up on the management utility. This process could
take up to five minutes or even more.
Important Note
Free TFTP Servers can be downloaded from the following locations:
Solarwinds TFTP Server http://www.solarwinds.com/products/freetools/free_tftp_server.aspx
Note: for Solarwinds, please remember to Start the TFTP Server Service, the default state of the TFTP is Stop.
TFTPD32 TFTP Server
http://tftpd32.jounin.net/tftpd32.html
SW5501 – SW5502
Wireless Serial Server
User Manual
Warranty
9 Warranty
Limited Warranty Conditions
Products supplied by Atop Technologies Inc. are covered in this warranty for undesired performance or defects
resulting from shipping, or any other event deemed to be the result of Atop Technologies Inc.’s mishandling. The
warranty does not cover; however, equipment which has been damaged due to accident, misuse, abuse, such as:







Use of incorrect power supply, connectors, or maintenance procedures
Use of accessories not sanctioned by us
Improper or insufficient ventilation
Improper or unauthorized repair
Replacement with unauthorized parts
Failure to follow our operating Instructions
Fire, flood, “Act of God”, or any other contingencies beyond our control.
RMA and Shipping Reimbursement





Customers must always obtain an authorized “RMA” number from us before shipping the goods to be
repaired.
When in normal use, a sold product shall be replaced with a new one within 3 months upon purchase. The
shipping cost from the customer to us will be reimbursed.
After 3 months and still within the warranty period, it is up to us whether to replace the unit with a new one;
normally, as long as a product is under warranty, all parts and labor are free-of-charge to the customers.
After the warranty period, the customer shall cover the cost for parts and labor.
Three months after purchase, the shipping cost from you to us will not be reimbursed, but the shipping costs
from us to the customer will be paid by us.
Limited Liability
Atop Technologies Inc. shall not be held responsible for any consequential losses from using our products.
Warranty
Atop Technologies Inc., gives a 5-year maximum warranty for Industrial Wireless Serial Device Server products.
SW5501 – SW5502
Wireless Serial Server
User Manual
Atop Technologies, Inc.
www.atoponline.com
www.atop.com.tw
TAIWAN HEADQUARTER:
ATOP CHINA BRANCH:
2F, No. 146, Sec. 1, Tung-Hsing Rd,
30261 Chupei City, Hsinchu County
Taiwan, R.O.C.
Tel: +886-3-550-8137
Fax: +886-3-550-8131
3F, 75th, No. 1066 Building,
Qingzhou North Road,
Shanghai, China
Tel: +86-21-64956231
ATOP INDIA OFFICE:
ATOP INDONESIA BRANCH:
Abhishek Srivastava
Head of India Sales
Atop Communication Solution(P) Ltd.
No. 22, Kensington Terrace,
Kensington Rd,
Bangalore, 560008, India
Tel: +91-80-4920-6363
E-mail: Abhishek.S@atop.in
Jopson Li
Branch Director
Wisma Lampung Jl.
No. 40, Tomang Raya
Jakarta, Barat, 11430, Indonesia
Tel: +62-857-10595775
E-mail: jopsonli@atop.com.tw
ATOP EMEA OFFICE:
ATOP AMERICAs OFFICE:
Bhaskar Kailas (BK)
Vice President (Business Development)
Atop Communication Solution(P) Ltd.
No. 22, Kensington Terrace,
Kensington Rd,
Bangalore, 560008, India
Tel: +91-988-0788-559
E-mail: Bhaskar.k@atop.in
Venke Char
Sr. Vice President & Head of Business
11811 North Tatum Blvd, Suite 3031
Phoenix, AZ 85028,
United States
Tel: +1-602-953-7669
E-mail: venke@atop.in
Warranty
Open as PDF
Similar pages