5 Ports NWay Switching Hub
FCC Warning
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 limitations 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 no 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 or more of the following measures:
!" Reoriented or relocate the receiving antenna.
!" Increase the separation between the equipment and receiver.
!" Connect the equipment into a different outlet from that the receiver is
connected.
!" Consult your local distributors or an experienced radio/TV technician for help.
!" Shielded interface cables must be used in order to comply with emission
limits.
Copyright © 1999 All Rights Reserved.
Company has an on-going policy of upgrading its products and it may be possible
that information in this document is not up-to-date. Please check with your local
distributors for the latest information. No part of this document can be copied or
reproduced in any form without written consent from the company.
Trademarks:
All trade names and trademarks are the properties of their respective companies.
Table of Contents
1.
Unpacking Information
2.
Introduction To 5 Port NWay Switching Hub
3.
2.1
2.2
2.3
2.3.1
2.3.1.1
2.3.2
2.3.2.1
2.3.2.2
2.3.2.3
2.3.3
2.4
2.4.1
Installing And Using 5 Port NWay Switching Hub
3.1
3.1.1
3.1.2
3.1.2.1
3.1.2.2
4.
Installing 5-Ports NWay Switching Hub
Desktop Installation
Installing Network Cables
Station Connection with Twisted-Pair Cable
Switch to Switch Connections with Twisted-Pair Cable
Switching Operation
4.1
4.2
4.3
5.
General Description
Key Features
The Front Panel
System LEDs
Power LED
Port LEDs
100M LED
Link/Act LED
FDX/COL LED
Uplink Port
The Rear Panel
Power Connecting
MAC Address Table & Learning
Filtering and Forwarding
Store and Forward
Product Specifications
1.
Unpacking Information
Thank you for purchasing the 5-port NWay switching hub. Before you start,
please check all the contents of this package.
The product package should include the following:
1. One 5-port NWay switching hub
2. One external power supply
3. Screws and wall-mount plastic
4. User’s manual
2.
Introduction To 5 Port NWay Switching Hub
2.1 General Description
The device is a powerful, high-performance Fast Ethernet switching hub, with
all 5 ports capable of 10 or 100Mbps auto-negotiation operation (NWay) which
means the switch could automatically negotiate with the connected partners on the
network speed and duplex mode. It is ideal for micro-segmenting large networks into
smaller, connected subnets for improved performance, enabling the bandwidth
demanding multimedia and imaging applications. Moreover, the 10/100Mbps
auto-sensing ability provides an easy way to migrate 10Mbps to 100Mbps network
with no pain. Compared to the shared 10Mbps or 100Mbps networks, the switching
hub delivers a dedicated 10/100Mbps connection to every attached client with no
bandwidth congestion issue.
Store-and-forward switching mode promises the low latency plus eliminates all
the network errors, including runt and CRC error packets. To work under full-duplex
mode, transmission and reception of the frames can occur simultaneously without
causing collisions as well as double the network bandwidth.
The switching hub is plug-n-play without any software to configure and also
fully compliant with all kinds of network protocols. Moreover, the rich diagnostic LEDs
on the front-panel for providing the operating status of individual port and whole
system.
For network connection:
The switching hub can use the following types of cabling:
!" 10BASE-T Category 3, 4 or 5 UTP/STP
!" 100BASE-TX Category 5 UTP/STP
Category 5 cable is preferred to be used with this product in structured wiring
environments. This will ensure correct operation of all ports at 10Mbps or
100Mbps.
2.2 Key Features
The switching hub provides the following key features:
!"
!"
!"
!"
!"
!"
!"
!"
Complies with 10BASE-T specifications of the IEEE802.3 standard
Complies with 100BASE-TX specifications of the IEEE802.3u standard
Five RJ-45 ports for 100Base-TX and 10Base-T connectivity
Supports NWay protocol for speed (10/100Mbps) and duplex mode (Half/Full)
auto-detection
One uplink port for cascading switch to switch or switch to hub with no
cross-over cable
Supports full and half duplex operation on all ports
Wire-speed packet filtering and forwarding rate
Store-and-forward architecture filters fragment & CRC error packets
Supports 8K MAC address entries in whole system
1MBytes buffer memory
Supports extensive LED indicators for network diagnostics
External power adapter
FCC Class A, CE
2.3
The Front Panel
!"
!"
!"
!"
!"
The front panel of the switching hub is shown below.
The auto-negotiation feature of the switching hub allows each port of the device
running at one of the following four operation modes:
1. 100Mbps full-duplex
2. 100Mbps half-duplex
3. 10Mbps full-duplex
4. 10Mbps half-duplex
The uplink port is used for connecting to another unit without using crossover
cable. When using the uplink port, you can extend the distance to 100m for linking
another switch or hub.
Warning: The RJ-45 ports are shielded data sockets. They can not be used as
telephone sockets. Only RJ45 plugs are allowed to connect these
sockets.
2.3.1 System LEDs
System LED indicators are located on the front panel for showing the
operating status of the whole device.
2.3.1.1 Power LED
This indicator lights green when the hub is receiving power; otherwise, it is off.
2.3.2 Port LEDs
Port LED indicators are located on the front panel for showing the operating
status of each port.
2.3.2.1 100M LED
The 100M LED indicates the link speed of each port. If the LED light green
then the connection speed is 100Mbps, off for 10Mbps.
2.3.2.2 Link/Act LED
Every port has a Link/Activity LED. Steady green (link state) indicated that the
port has good linkage to its associated device. Flashing green indicates that the port
is receiving or transmitting data between its associated device.
If the port is connected but the Link/Activity LED is dark, check the following items:
1. The switching hub and the connected device’s power are on or not
2. The port’s cable is firmly seated in its connectors in the switching hub and in the
associated device.
3. The connecting cable is good and with correct type
4. The connecting device, including any network adapter is functioning.
From the Speed LED and Link/Activity, we could judge the connection speed as
following:
Speed LED
Off
Off
Green
2.3.2.3
Link/Activity LED
Off
Green
Green
Status
No Connection
Connect as 10Mbps
Connect as 100Mbps
FDX/COL LED
A collision occurs when two stations within a collision domain attempt to
transmit data at the same time. Intermittent flashing amber of the collision LED is
normal; the contending adapters resolve each collision by means of a
wait-then-retransmit algorithm. Frequency of collisions is an indicator of heavy traffic
on the network.
If the FDX/COL light green which means the port is under full-duplex operation
or dark for half-duplex mode. The following table is a summary of Port LEDs.
LED
100M
Link/Act
FDX/COL
Operation
100Mbps (Green), 10Mbps (Off)
Link is present (Green), Activity (Blinking Green)
Full-Duplex (Amber), Half-Duplex (Off), COL (Blinking Amber)
2.3.3
Uplink Port
The uplink port could be used for switch to hub or switch to switch connection
without cross-over cable.
2.4 The Rear Panel
The rear panel of the hub is shown below
2.4.1 Power Connecting
Plug the circle end of the power adapter firmly into the rear panel of the
switching hub, and the other end into an electric service outlet then the system is
ready.
3.
Installing And Using 5 Port NWay Switching Hub
3.1 Installing The 5 Port NWay Switching Hub
The hub does not require software configuration. Users can immediately use
any of the features of this product simply by attaching the cables and turning the
power on.
3.1.1 Desktop Installation
To locate the switching hub on the desktop and place the hub on a clean, flat
desk or table close to a power outlet. Plug in all network connections and the power
cord, then the system is ready.
When deciding where to put the switching hub then you must ensure:
!" It is accessible and cables can be connected easily
!" Cabling is away from:
Sources of electrical noise such as radios, transmitters and broadband
amplifiers.
Power lines and fluorescent lighting fixtures.
!" Water or moisture can not enter the unit
!" Air flow around the unit and through the vents in the side of the case is not
restricted (company recommend that you provide a minimum of 25mm inch
clearance)
To prolong the operational life of your units:
!" Never stack units more than eight high if freestanding.
!" Do not place objects on top of any unit or stack
!" Do not obstruct any vents at the sides of the case
3.1.2 Installing Network Cables
After placing the hub on the desktop, then we need to know how to connect
the device to network.
3.1.2.1 Station Connections with Twisted-Pair Cable
Connect each station to the hub by a twisted-pair straight cable (10BASE-T or
100BASE-T cables). Plug one RJ-45 connector into a front-panel port of the hub, and
plug the other RJ-45 connector into the station’s network adapter.
3.1.2.2 Switch to Switch Connections with Twisted-Pair Cable
In making a switch to switch connection, you could use uplink port to connect
another switch with no crossover cable.
4.
Switch Operation
4.1 MAC Address Table and Learning
The switching hub is implemented with a MAC address table which is
composed of many entries. Each entry is used to store the address information of
network nodes on the network, including MAC address, port ID, etc. The information
is the most important base to do packet filtering and forwarding.
When one packet comes in from any port, the switching hub will learn the
source address, port ID, and the other related information in address table. Therefore,
the content of the MAC table will update dynamically.
4.2 Filtering and Forwarding
When one packet comes in from any port of the switching hub, it will check the
destination address besides the source address learning. The hub will look up the
address table for the destination address. If not found, this packet will be forwarded
to all the other ports except the port which this packet comes in. If found, and the
destination address is located at different port from this packet comes in, the packet
will be forwarded to the port where this destination address is located according to
the information of address table. But, if the destination address is located at the
same port as this packet comes in then this packet will be filtered.
4.3 Store and Forward
Store-and-forward is one kind of packet-forwarding methodology. As a
store-and-forward switching hub, it will store the complete packet in the internal
buffer and do the complete error checking before transmitting to the network.
Therefore, no error packets will disturb the network. It is the best choice when a
network needs efficiency and stability.
5.
Product Specifications
Standard
Interface
Cable Connections
Network Data Rate
Transmission Mode
LED indications
System Buffer Memory
MAC Address Table
Filtering/Forwarding Rate
Emission
Operating Temperature
Operating Humidity
Dimension (mm)
Power Supply
IEEE802.3, 10BASE-T
IEEE802.3u, 100BASE-TX
RJ-45 x 5 NWay switching ports
One uplink port
RJ-45 (10BASE-T) : UTP Category 3,4,5
RJ-45 (100BASE-TX) : UTP Category 5
Auto-negotiation (10Mbps, 100Mbps)
Auto-negotiation (Full-duplex, Half-duplex)
System
Power x1
Port
100M
Link/Activity
FDX/COL
2Mbyte
8K entries
10Mbps: 14,880pps/14,880pps
100Mbps: 148,800pps/148,800pps
FCC Class A, CE
00 ~ 500C (32 ~ 1220F)
10% - 90%
150 x 100 x 35 mm
External Power Adapter
61NB-53050-200
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