Accton Technology Fast EtherHub-8s Installation manual

Accton Technology Fast EtherHub-8s Installation manual
Fast EtherHub-8s
&INO<GG<ODJI*<IP<G
Installation Manual
Fast EtherHub-8s
Smart Fast Ethernet Hub
with 8 100BASE-TX Ports
Copyright © 1997 by Accton Technology Corporation. All rights reserved.
No part of this document may be copied or reproduced in any form or by any means without the
prior written consent of Accton Technology Corporation.
Accton makes no warranties with respect to this documentation and disclaims any implied
warranties of merchantability, quality, or fitness for any particular purpose. The information in this
document is subject to change without notice. Accton reserves the right to make revisions to this
publication without obligation to notify any person or entity of any such changes.
International Headquarters
No. 1 Creation Road III,
Science-based Industrial Park
Hsinchu 300, Taiwan, R.O.C.
Phone: 886-3-5770-270
FAX: 886-3-5770-267
BBS: 886-3-5770-654
Internet: [email protected]
USA Headquarters
1962 Zanker Road
San Jose, CA 95112
Phone: 408-452-8900
FAX: 408-452-8988
BBS: 408-452-8828
FAST FAX: 408-452-8811
Accton, EtherHub and SmartWatch are trademarks or registered trademarks of Accton Technology
Corporation. Other trademarks or brand names mentioned herein are trademarks or registered
trademarks of their respective companies.
EH3042S-TX
150497-101
E0797-R04
Package Contents
Carefully unpack the contents of the package and verify them against the
checklist given below.
Package Checklist
æ
æ
æ
æ
æ
Fast EtherHub-8s (Model No. EH3042S-TX)
AC power cord (optional)
Four rubber foot pads
Installation manual
Warranty registration card
Please inform your dealer immediately should there be any wrong, missing, or
damaged parts.
If possible, retain the carton, including the original packing materials. Use
them again to repack the unit in case there is a need to return it for repair.
To qualify for product updates and product warranty registration, fill in the
Owner Registration Card and return it to Accton Technology Corporation.
Package Contents
i
Quick Installation
The Fast EtherHub-8s contains 8 100BASE-TX Fast Ethernet ports. The smart
design built into the front display panel provides a friendly interface that
simplifies installation and network troubleshooting. If you are already familiar
with basic network operations, you should be able to install this hub as
described below:
1. Unpack the Fast EtherHub-8s.
2. Find a location close to the network devices you need to connect, and within
easy reach of an electrical outlet.
3. Mount the hub on a desktop or any other flat surface. If you are installing
multiple hubs, you can stack them on top of each other (after attaching the
foot pads).
4. Connect any devices that use a standard network interface to the RJ-45
(MDI-X) station ports (e.g., a workstation, server, bridge or router). Use
100W Category 5 STP or UTP cable to connect to the hub, and be sure the
length of any twisted-pair connection does not exceed 100 meters (328 feet).
Refer to Chapter 3 for sample configurations.
5. To cascade to another hub or switch, run straight-through twisted-pair cable
from the (8MDI) daisy-chain port on this hub to any (MDI-X) station port on
the other device (or vice versa). Refer to Figure 3.2.
If necessary, you can also cascade between two station ports using crossover
cable. However, be sure not to exceed the maximum length between end
nodes as described in Chapter 2.
Quick Installation
iii
Fast EtherHub-8s User’s Guide
6. This hub can serve as a stand-alone repeater for small networks, can be
cascaded with compatible devices (e.g., Fast Ethernet hub or switch), or can
be connected to a network interconnection device (e.g., Fast Ethernet bridge
or router).
7. Verify network communications by ensuring that • you have made all the necessary connections
• you can access any connected resources
• the hub’s indicators are functioning properly
If you encounter any problems in installing the Fast EtherHub, refer to Chapter 2
for a detailed description of installation procedures, Chapter 3 for sample
configurations, or Appendix A for help in troubleshooting.
Note: Refer to Chapter 2 for a more detailed description of calculating the maximum cable
length permitted between two end nodes for Fast Ethernet.
iv
Quick Installation
About this Guide
This guide is designed for the experienced network installer. It describes how
to install and operate Accton’s Fast EtherHub-8s. After reading this manual,
you should be able to use the front display panel and configure options to
manage all your network connections.
This manual covers the following topics:
Chapter 1 - Product Overview
Brief description of Fast Ethernet, followed by a description of this hub and a
summary of its important features and specifications.
Chapter 2 - Installing the System
Installing a Fast EtherHub and making basic network connections.
Chapter 3 - Configuring the Network
Shows sample network configurations for a local area network.
Chapter 4 - Hardware Reference
Detailed description of indicator panel and ports.
Appendices Troubleshooting, cable assignments, and product specifications.
About this Guide
v
Contents
Chapter 1: Product Overview ................................................. 1-1
Introduction to Fast Ethernet .....................................................................................1-1
Accton’s Fast EtherHub-8s ........................................................................................1-1
Basic Features ...........................................................................................................1-2
Chapter 2: Installing the System............................................ 2-1
Pre-Installation Requirements ...................................................................................2-1
Connecting the Hub System ......................................................................................2-2
Making a Connection via an MDI-X Station Port ................................................2-2
Making a Connection via the MDI Daisy-Chain Port...........................................2-3
Distance Limit for Fast Ethernet Cabling .............................................................2-3
Providing Power to the EtherHub..............................................................................2-4
Verifying Port Status .................................................................................................2-4
Verifying System Operation ......................................................................................2-5
Chapter 3: Configuring the Network...................................... 3-1
Stand-Alone...............................................................................................................3-1
Connecting Multiple Hubs ........................................................................................3-2
Using the RJ-45 Daisy-Chain Port........................................................................3-2
Guidelines for Configuring Multiple Hubs...........................................................3-3
Chapter 4: Hardware Reference............................................. 4-1
Front Panel ...............................................................................................................4-1
Indicators..............................................................................................................4-1
Power Status ...................................................................................................4-2
Statistical Display for System Performance ....................................................4-3
Port Status Display..........................................................................................4-4
RJ-45 Ethernet Ports.............................................................................................4-5
Rear Panel ...............................................................................................................4-6
Power Socket........................................................................................................4-6
vii
Fast EtherHub-8s User’s Guide
Appendix A: Troubleshooting ................................................ A-1
Diagnosing Hub Indicators........................................................................................A-1
System Diagnostics ...................................................................................................A-2
Power and Cooling Problems ...............................................................................A-2
Installation ............................................................................................................A-2
Physical Configuration .........................................................................................A-3
Hub Integrity ........................................................................................................A-3
Appendix B: Port and Cable Assignments............................. B-1
RJ-45 Port ...............................................................................................................B-1
Appendix C: Specifications.................................................... C-1
Product Specifications...............................................................................................C-1
Appendix D: Regulatory Standards Compliance.................. D-1
EMI Certification ......................................................................................................D-1
FCC Class B .........................................................................................................D-1
Voluntary Control Council for Interference ........................................................D-2
European Community Immunity Requirements....................................................D-2
CE Mark Declaration of Conformance ................................................................D-3
Safety Compliance.....................................................................................................D-4
Underwriters Laboratories Inc..............................................................................D-4
Sicherheitshinweise ..............................................................................................D-5
Appendix E: Product Support Services ................................ E-1
Product Registration..................................................................................................E-1
Problem Report .........................................................................................................E-1
Hardware Repair Service...........................................................................................E-1
Bulletin Board Service (BBS) ...................................................................................E-2
Interactive Fast Fax (U.S.A. Office)..........................................................................E-2
Technical Support .....................................................................................................E-3
viii
Contents
Fast EtherHub-8s User’s Guide
Limited Warranty .......................................................................................................E-4
Customer Remedies..............................................................................................E-4
Return Process......................................................................................................E-5
Accton Offices...........................................................................................................E-6
Ordering Information ................................................................................................E-6
Glossary
Index
List of Figures
Figure 3.1
Figure 3.2
Figure 3.3
Figure 4.1
Figure 4.2
Figure 4.3
Figure B-1
Stand-Alone Configuration ....................................................................3-1
Multiple Hub Configuration Using the Daisy-Chain Port ......................3-2
Cabling Limits for Multiple Hub Configuration.....................................3-4
Front Panel .............................................................................................4-1
Indicators ...............................................................................................4-2
Rear Panel ..............................................................................................4-6
RJ-45 Connector (on the Hub Side) .......................................................B-1
List of Tables
Table B-1 RJ-45 Pin Assignments............................................................................B-1
Contents
ix
Chapter 1: Product Overview
Introduction to Fast Ethernet
Standard 10 Mbps Ethernet has served well for past generations of 286 and
386 machines performing simple file transfers. However, with the inevitable
growth in corporate network size and the introduction of fully-functional 32-bit
PC architectures, and operating systems running complex applications, 10 Mbps
Ethernet has become a serious bottleneck.
With the recent flood of choices for upgrading media bandwidth, 100 Mbps
Fast Ethernet has become the most popular because of its low cost, compatibility
with existing Ethernet applications, and the fact that it can run on top of an
installed base of twisted-pair cabling. Fast Ethernet can be easily integrated
into an existing 10 Mbps Ethernet environment with no need for protocol
translation or changes to network software.
Accton’s Fast EtherHub-8s
The Fast EtherHub-8s includes 8 100BASE-TX Ethernet ports. It provides a
friendly design that simplifies installation and network troubleshooting. The
SmartWatchTM indicator panel includes Utilization and Collision rate LEDs, as
well as Partition, Link and Traffic LEDs to ease network management.
The Fast EtherHub-8s can be used to relieve common network congestion,
regardless of whether it is caused by too many stations contending for limited
bandwidth or by a server that is supporting too many users. It can significantly
improve access both to key servers and to the network backbone. This hub not
only delivers a vast improvement in network response time, but helps you
maintain outstanding performance as your user community continues to grow.
Product Overview
1-1
Fast EtherHub-8s User’s Guide
Basic Features
• Transmits data at 100 Mbps for demanding applications
• Conforms to the IEEE 802.3u repeater specification for 100BASE-TX
• Provides 8 RJ-45 100BASE-TX station ports (using MDI-X wiring)
• Port 8 can serve as an MDI-X station port (for connection to network devices
such as workstations or servers) or as an MDI daisy-chain port (for
connection to network devices such as hubs or switches), eliminating the
need for crossover cables
• Supports 100Ω Category 5 shielded or unshielded cable (STP or UTP)
• Friendly design that monitors network utilization, collisions, link and port
partition status
• LED indicator panel includes Utilization and Collision rate indicators for
reporting hub activity and facilitating problem diagnosis
• Automatically partitions bad ports to protect the network system
• Automatic polarity detection and correction permits automatic adjustment
for wiring errors
• Plug-and-play operation
The Fast EtherHub-8s also supports the following basic system safeguards:
• This hub features automatic partitioning and reconnection, jabber lockup
protection, and automatic polarity detection for network cabling.
• With automatic partitioning and reconnection, any port is automatically
isolated if excessive collisions occur on it. When the condition is corrected,
the port is automatically reconnected.
1-2
Product Overview
Fast EtherHub-8s User’s Guide
• With the jabber lock-up function, the hub automatically stops transmission
of abnormal Ethernet frames that may cause data loss for all network users.
(Jabber refers to abnormal Ethernet frames which are much too long and
may come from a malfunctioning Ethernet card.)
• With automatic polarity detection, the hub recognizes and adjusts for
attached cable assemblies which may be wired with incorrect polarity on the
receive pair.
Product Overview
1-3
Chapter 2: Installing the System
This chapter provides information on installing the Fast EtherHub-8s, establishing network connections, and configuring the system. You may install this
hub on any level surface (e.g., a table or shelf) or in a standard EIA equipment
rack. However, please take note of the following minimum site requirements
before you begin.
Pre-Installation Requirements
Before you start actual hardware installation, make sure you can provide the
right operating environment, including power requirements, sufficient physical
space, and proximity to other network devices that are to be connected. Verify
the following installation requirements:
• Power requirements: 100 to 240 VAC (± 10%) at 50 to 60 Hz (± 3Hz). The
hub’s power supply automatically adjusts to the input voltage level.
• The EtherHub should be located in a cool dry place, with at least 10 cm (4
in.) of space at the front and back for ventilation.
• Place the hub out of direct sunlight, and away from heat sources or areas
with a high amount of electromagnetic interference.
• Check if network cables and connectors needed for installation are available.
• Find a suitable location at the center of the devices you want to link, and
near a power outlet
Installing the System
2-1
Fast EtherHub-8s User’s Guide
Connecting the Hub System
The EtherHub-8s has 8 RJ-45 station ports and 1 RJ-45 daisy-chain port. The
station ports allow you to make connections to devices such as a workstation,
server, bridge or router. You can also cascade to another compatible hub or
switch by connecting an MDI port on one device (e.g., Port 8MDI on this hub)
to an MDI-X port on the other device. Or you can cascade from an MDI port
on another device to any MDI-X port on this hub. See Figure 3.2.
Making a Connection via an MDI-X Station Port
You can connect an RJ-45 station port on the hub to any device that uses a
standard network interface such as a workstation or server, or also to a network
interconnection device such as a bridge or router (depending on the port type
implemented).
1. Prepare the network devices you wish to network. Make sure you have
installed suitable 100BASE-TX network interface cards for making a
connection to any of the hub’s station ports. You also need to prepare
straight-through shielded or unshielded twisted-pair cables with RJ-45 plugs
at both ends. Use 100W Category 5 cable for all connections.
2. Connect one end of the cable to the RJ-45 port of the network interface card,
and the other end to any available (MDI-X) station port on the hub. When
inserting an RJ-45 plug, be sure the tab on the plug clicks into position to
ensure that it is properly seated. Using the hub in a stand-alone configuration,
you can network up to 8 nodes.
I
Do not plug a phone jack connector into the RJ-45 port. This may damage the hub.
Use only twisted-pair cables with RJ-45 connectors that conform with FCC standards.
Notes: 1. When connecting to station Port 8MDI, do not use Port 8MDI-X.
2. Make sure each twisted-pair cable does not exceed 100 meters (328 feet).
2-2
Installing the System
Fast EtherHub-8s User’s Guide
Making a Connection via the MDI Daisy-Chain Port
1. To make a direct connection to another compatible repeater or switch, use the
8MDI daisy-chain port. When connecting to this port, remember not to use
Port 8MDI.
2. Prepare straight-through shielded or unshielded twisted-pair cables with
RJ-45 plugs at both ends. Use 100W Category 5 cable for all connections.
Connect one end of the cable to Port 8MDI on this hub, and the other end to a
standard MDI-X station port on the other device. When inserting an RJ-45
plug, be sure the tab on the plug clicks into position to ensure that it is
properly seated.
Notes: 1. When connecting to Port 8MDI, do not use Port 8MDI-X.
2. Make sure the length of twisted-pair cable does not exceed 100 meters (328 feet).
3. To connect to another hub or switch, you may also run straight-through
twisted-pair cabling from a station port on this hub to a crossover port on
another device. However, if you must connect to another device via station
ports at both ends of the cable, use crossover cabling.
Distance Limit for Fast Ethernet Cabling
All end-node devices (e.g., workstations or servers) must be within 100 meters
(328 feet) of the connected hub when using twisted-pair cabling. However,
when linking one or more Fast Ethernet repeaters together (i.e., in the same
collision domain), the overall length of cable used between any two nodes
should not exceed the limits outlined in the IEEE 802.3u standard. In simple
terms, the maximum length of cabling that can be run from end-node to endnode is
367m ≥ S(repeater equivalent length) + S(length of CAT-5 twisted-pair cable)
This 100BASE-TX Class II Repeater has an inherent repeater delay of 80 bit
time or 72 meters (236 feet) of twisted-pair cable. Taking a daisy chain of two
hubs connected via twisted-pair cabling for an example, the maximum length
Installing the System
2-3
Fast EtherHub-8s User’s Guide
from node to node is 367m - (2 x 72m) = 223m (732 ft). Therefore, if both
node A and B are linked to separate repeaters in a two hub system, each using
100 meters (328 feet) of cable to connect to their respective hub, then the interhub cabling will be limited to 23 meters (75 feet), i.e., 223m - 2x100m = 23m,
as illustrated in Figure 3-2.
Providing Power to the EtherHub
1. Power on the hub by plugging the power cord into the power socket at the
rear of the EtherHub, and the other end into a power outlet.
2. Check the LED marked Power on the front panel to see if it is on. The unit
will automatically select the setting that matches the connected input voltage.
Therefore, no additional adjustments are necessary when connecting it to
any input voltage within the range marked on the rear panel.
F
The unit supports a “hot remove” feature which permits you to connect/
disconnect cables without powering off the hub and without disrupting the
operation of attached devices.
Verifying Port Status
Check each connection by viewing the port status indicators listed below. (For
a more detailed description of these indicators, refer to Chapter 4.)
Indicates that the port has established a valid network connection.
Traffic
Indicates traffic traversing the port.
Partition Indicates that the port has been isolated from the hub when predefined collision threshold has been reached.
Link
If the Link status indicator is not functioning properly, or you experience any
other difficulties in setting up the hub, refer to Appendix A.
2-4
Installing the System
Fast EtherHub-8s User’s Guide
Verifying System Operation
Verify that all attached devices have a valid connection. The hub monitors
link status for each port. If any device is properly connected to the hub and
transmitting a link beat signal, the Link indicator lights up for the corresponding
port. If the Link indicator fails to light up when you connect a device to the
hub, check the following items • Be sure the twisted-pair cable is properly attached to the connected device
and the hub. Verify that the RJ-45 plug snaps into place when attached.
• See if the twisted-pair cable is functioning properly by using it for another
port and attached device that already displays valid indications when
connected to the network.
• Check the length of the twisted-pair connection to be sure it does not exceed
100 meters (328 feet).
• Test the adapter for an attached workstation by trying it in another computer
that has been successfully connected to the network.
If you still can’t resolve the problem, please refer to Troubleshooting in Appendix A.
Installing the System
2-5
Chapter 3: Configuring the Network
The Fast EtherHub-8s allows great flexibility in configuring your network. You
can use it in a stand-alone or multiple hub configuration. Some of the common
applications for this Fast EtherHub are described in this chapter.
Stand-Alone
This hub can be used in a simple stand-alone configuration as illustrated below.
In compliance with IEEE 802.3u standards, the maximum cable distance
between the hub and any workstation is 100 meters (328 feet) for twisted-pair
cable.
Figure 3.1 Stand-Alone Configuration
Configuring the Network
3-1
Fast EtherHub-8s User’s Guide
Connecting Multiple Hubs
Using the RJ-45 Daisy-Chain Port
You can easily connect to another hub via the MDI daisy-chain port. Figure 3.2
shows a sample configuration.
Figure 3.2 Multiple Hub Configuration Using the Daisy-Chain Port
3-2
Configuring the Network
Fast EtherHub-8s User’s Guide
Guidelines for Configuring Multiple Hubs
In a multiple hub configuration, the maximum overall segment length for interhub cabling depends on the length of the cables used to connect station nodes to
the hub system and the number of hubs you cascade together. The IEEE 802.3u
standard (illustrated in the preceeding example) provides strict guidelines for
calculating the maximum network diameter. A quick formula for calculating
the maximum length of cabling that can be run from end-node to end-node is:
367m (1204 ft) ≥ S(repeater equivalent length) + S(length of twisted-pair cable)
Remember that this 100BASE-TX Class II Repeater has an inherent repeater
delay of 80 bit time or 72 meters (236 feet) of twisted-pair cable. For the daisy
chain of three hubs shown in Figure 3.3, communications must be supported for
node pairs AB and AC. In this case, first determine the limitations on cable
length found on the longest path (i.e., the path with the longest delay time).
If node A and B are linked to repeaters 1 and 3 respectively in the system (each
using 50 meters (164 feet) of twisted-pair cable), then the maximum length
from node A to B is 367m - (3 x 72m) = 151m (495 feet) and the total interhub
cabling will be limited to 51 meters (167 feet), i.e., 151m - 2x50m = 51m.
Therefore, if you use 21 meters (68 feet) of twisted-pair cable to connect hubs 1
and 2, then 30 meters (98 feet) of cable can be used to connect hubs 2 and 3.
Then, if node A and C are linked to adjacent repeaters 1 and 2 in the hub
system, the maximum length of twisted-pair cable that can be used to connect
node C to hub 2 is 367m - 2*72m - 50m - 21m = 152 meters (498 feet).
However, the maximum length for any twisted-pair connection cannot exceed
100 meters (328 feet).
Configuring the Network
3-3
Fast EtherHub-8s User’s Guide
Figure 3.3 Cabling Limits for Multiple Hub Configuration
Notes:
1. The maximum length for each cable must be determined by calculations for the
longest path (i.e., node-to-node connection) that passes through that segment.
2. To control the number of hubs in a path, we recommend that one hub be used to
connect to several other hubs. Make sure there is only one path between any two
stations on the network.
3. If you need to connect network devices over a long distance, use a switching hub
or bridge to split the network up into two or more collision domains. For detailed
information on purchasing the required equipment, contact your local distributor or
Accton representative for support.
3-4
Configuring the Network
Chapter 4:
Hardware Reference
Before connecting any network device to this hub, please review Chapter 2 for
information on system installation and Chapter 3 for a brief look at common
network architectures. This chapter describes the hardware features of the Fast
EtherHub-8s. For easier management and control of the hub, familiarize yourself
with the display indicators and ports.
Front Panel
There are 8 RJ-45 MDI-X station ports and 1 RJ-45 MDI daisy-chain port on the
front panel. Moreover, the system indicators provide a simple interface for
monitoring the hub. The front panel includes a power indicator, a statistical
display for network traffic, and port status indicators as shown below.
100BASE-TX Class II Repeater
Figure 4.1
Front Panel
Indicators
The SmartWatch indicator panel simplifies monitoring of various network
conditions by providing LEDs that indicate the status of each station port and the
overall condition of the hub. It provides all the key information required to
manage your network on a daily basis. The following pages list the indicators
and their functions.
Hardware Reference
4-1
Fast EtherHub-8s User’s Guide
The front panel array provides indicators that show the utilization of network
bandwidth and indicate the status of port connections. It includes port status
indicators and a statistical display for network traffic as shown below.
Figure 4.2
Indicators
Power Status
Color:
Label:
Function:
Condition
ON
OFF
4-2
Green
Power
Power indicator
Indication
Unit is receiving power.
Power is disconnected, no power received.
Hardware Reference
Fast EtherHub-8s User’s Guide
Statistical Display for System Performance
Utilization - (Utilization%) The statistical indicators show the percentage of valid data
passing through all ports compared to overall network bandwidth (updated every
0.5 seconds). There are 5 LEDs representing the percentage of network utilization.
The corresponding LEDs light up to show that the utilization of LAN bandwidth
has reached this level. When active, these LEDs behave like a stereo’s equalizer
display.
For example, if network utilization reaches 1%, the LED labeled 1% will light up.
However, if network utilization rises above 1% (e.g., 30%), the LED labeled 30 and
all the other LEDs before it (i.e., 1, 5 and 15) will also light up in rapid succession.
These indicators monitor the share of valid network frames handled by the hub
within a 100 Mbps bandwidth. They provide a quick way to monitor the current
traffic load relative to the network’s capacity.
Collision - (Collision%)- The statistical indicators show the percentage of packet
collisions occurring out of the total packets transmitted by the hub. Collisions
occur when two or more devices connected to a hub attempt to transmit data
simultaneously on the network. When a collision occurs, devices pause and then
re-transmit after a pseudo-random wait period. Because wait periods differ among
devices, successive collisions become increasingly improbable.
The Collision LEDs assist the network manager in monitoring the percentage of
packet collisions occurring relative to the total packets transmitted by the hub.
When collisions reach a level marked on the front panel display, the corresponding LED lights up. For example, if packet collisions reach 1%, the LED labeled
1% will light up. However, if collisions go beyond 1% (e.g., 15%), the LED
+
labeled 15 % and all the other LEDs before it (i.e., 1, 3, 5 and 10) also light up in
rapid succession.
Hardware Reference
4-3
Fast EtherHub-8s User’s Guide
Note: If the hub displays a high collision rate, check to see if any of the connected
devices are malfunctioning or if a loop has been formed in your network connections.
Otherwise, you may need to reconfigure your network to balance the traffic load.
Port Status Display
Partition Status
Color:
Label:
Function:
Condition
ON
OFF
Red
Partition
Shows if the port has been isolated from the network
Indication
Indicates port has been partitioned due to an abnormal network condition.
Port is in good condition.
A port is temporarily partitioned when a line error or too many collisions are
detected on the attached segment. While it is automatically partitioned, the port
continues to receive data from the segment. However, data is not transmitted
onto the segment. When the problem is corrected or a valid data packet is
received through the port, the port is automatically reconnected. When
partitioning occurs, the port’s corresponding Partition LED will be continually
lit (RED light). Otherwise, this LED should be OFF (unlit).
Note: When a long run of collisions occur on the cable connected to a hub port (i.e.,
64 collisions), that port is automatically partitioned by the hub. It is automatically
reconnected when a collision-free data packet at least 512 bits long (i.e., a
minimum size legal packet) passes through the port.
Link Status
Color:
Label:
Function:
Condition
ON
OFF
4-4
Green
Link
Indicates a valid network connection associated with the port.
Indication
Indicates a valid link has been established on this port.
No valid link has been established on this port.
Hardware Reference
Fast EtherHub-8s User’s Guide
Troubleshooting: If the Link LED does not light up when a device is connected to its corresponding port, check that both the hub and connected device are powered on. For
devices connected to the hub using twisted-pair cable, check that the cable length does
not exceed 100 meters (328 feet). You should have standard, straight-through cables and
not crossover or other specialized cables.
Incoming Traffic
Color:
Label:
Function:
Condition
BLINKING
OFF
Green
Traffic
Indicates traffic entering the port.
Indication
Indicates the port is receiving packets; blinking is
proportional to the traffic entering the port.
No packets are being received by this port.
Hardware Reference
4-5
Fast EtherHub-8s User’s Guide
Rear Panel
There are 8 RJ-45 MDI-X station ports and 1 RJ-45 MDI daisy-chain port on the
front panel.This hub includes 8 Fast Ethernet station ports on the front panel; of
which Port 8 can also serve as a daisy-chain port. Connect the MDI-X station
ports to network devices such as workstations or servers, and the MDI port to a
network interconnection device such as another hub or switch. Remember that
you cannot connect to Port 8MDI-X and Port 8MDI at the same time.
Note: Use Category 5 straight-through twisted-pair cable (STP or UTP) for all standard
connections. However, if you must cascade between MDI-X station ports on two hubs,
use crossover cable.
The rear panel on the hub includes a full-range power socket.
Figure 4.3
Rear Panel
Power Socket
The power socket accepts AC power from 100 to 240V at 50 to 60Hz. The unit
is equipped with a universal full-range power source.
4-6
Hardware Reference
Appendix A: Troubleshooting
Diagnosing Hub Indicators
This Fast EtherHub can be easily monitored through its comprehensive panel
indicators. These indicators assist the network manager in identifying
problems the hub may encounter. This section describes common problems
you may encounter and possible solutions.
Symptom: Power indicator does not light up.
Cause:
Defective power outlet, power cord, or internal power supply.
Solution: Have your unit’s power supply or Power LED replaced. Ask for
dealer assistance.
Symptom: Partition indicator lights up.
Cause:
Hub has partitioned a port.
Solution: If port partitioning has occurred, the hub will automatically enable
the port when the faulty condition disappears.
Symptom: Link/Traffic indicator remains unlit after making a connection.
Cause:
Network interface (e.g., a network adapter card on the attached device),
network cable, or hub port is defective.
Solution: Verify that the hub and attached device are powered on. Be sure the
cable is plugged into both the hub and corresponding device. Verify
that the proper cable type is used (Chapter 2), and that its length
does not exceed 100 meters (328 feet). Check the adapter on the
attached device and cable connections for possible defects. Replace
the defective adapter or cable if necessary
Use the diagnostic procedures described in the following section to verify that
all other system components are functioning properly. If you still cannot
resolve the problem, contact your Accton distributor for assistance.
Troubleshooting
A-1
Fast EtherHub-8s User’s Guide
System Diagnostics
Power and Cooling Problems
If the Power indicator does not turn on when the power cord is plugged in, you
may have a problem with the power outlet, power cord, or internal power
supply as explained in the previous section. However, if the unit powers off
after running for a while, check for loose power connections, power losses or
surges at the power outlet, and verify the fan on back of the unit is unobstructed
and running prior to shutdown. If you still cannot isolate the problem, then the
internal power supply may be defective. In this case, contact your Accton
distributor for assistance.
Installation
Verify that all system components have been properly installed. If one or more
components appear to be malfunctioning (e.g., the power cord or network
cabling), test them in an alternate environment where you are sure that all the
other components are functioning properly.
Cabling
1. Verify that the cabling type is correct. Be sure all cable connectors are
securely seated in the required ports. Use 100W Category 5 straight-through
cable for all standard twisted-pair connections.
2. Make sure all devices are connected to the network. Equipment may have
been unintentionally disconnected from the network.
3. When cascading two devices using RJ-45 station ports at both ends of the
cable (i.e., not the MDI port), make sure a crossover cable is used. Crossover
cable should only be used if a daisy-chain port is not available.
A-2
Troubleshooting
Fast EtherHub-8s User’s Guide
External Adapters
Make sure the network interface hardware and software drivers for the attached
devices are function properly. Check the adapter cards and associated drivers
used in any attached workstation or server.
Physical Configuration
If problems occur after altering the network configuration, restore the original
connections, then try to track the problem down by implementing the new
changes, one step at a time. Ensure that cable distances and other physical
aspects of the installation do not exceed recommendations.
Hub Integrity
As a last resort verify the hub’s integrity with a power-on reset. Turn the
power to the hub off and then on a few times. If the problem still persists and
you have completed all the preceding diagnoses, contact your Accton
distributor for further assistance. (Refer to Appendix E.)
Troubleshooting
A-3
Appendix B:
Port and Cable Assignments
RJ-45 Port
Figure B-1 RJ-45 Connector (on the Hub Side)
Pin
1
2
3
6
4,5,7,8
MDI-X Assignment
(Station Port 1 ~ 8)
Input Receive Data +
Input Receive Data Output Transmit Data +
Output Transmit Data Not Used
MDI Assignment
(Cascade Port 8)
Output Transmit Data +
Output Transmit Data Input Receive Data +
Input Receive Data Not Used
Table B-1 RJ-45 Pin Assignments
Schematics for both straight and crossover twisted-pair cable are shown below.
Straight-Through
(Hub)
1
2
3
6
IRD+
IRDOTD+
OTD-
(Adapter)
1
2
3
6
OTD+
OTDIRD+
IRD-
Crossover
(Hub)
(Hub)
1
2
3
6
1
2
3
6
IRD+
IRDOTD+
OTD-
Port and Cable Assignments
IRD+
IRDOTD+
OTD-
B-1
Appendix C: Product Specifications
Transmission Technique
Topology
Access Method
Standards Conformance
Media Supported
Interfaces
Hub-to-Workstation Distance
Daisy-Chain Distance (2 hubs)
Dimensions
Power System
Temperature
Humidity
Certification
Emissions
Immunity
Safety
Baseband
Star or Tree
CSMA/CD, 100Mbps
IEEE 802.3u 100BASE-TX Class II Repeater
Unshielded or shielded twisted-pair cable
(100W Category 5 STP/UTP)
8 RJ-45 MDI-X station ports,
1 RJ-45 MDI daisy-chain port
100 meters (328 feet) max. using category 5 STP or UTP cable
23 meters (75 feet), assuming 100 meters (328 feet) from each
node to hub
273 mm x 166 mm x 42.9 mm
(10.75"x 6.54" x 1.69")
100~240 VAC, 1 Amp max.,
50/60 Hz full range
0°C to 40°C / 32°F to 104°F (Standard Operating)
5% to 95% (Noncondensing)
CE Mark
FCC Class B, VCCI Class B, CISPR Class B
IEC 1000-4-2, 3, 4, 6
UL, CSA, TÜV/GS
Product Specifications
C-1
Appendix D:
Regulatory Standards Compliance
EMI Certification
FCC Class B Certification
Accton Technology Corporation
Model Numbers: EH3042S-TX
FCC ID: HED3042S-TXRB
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following 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.
Warning: This equipment generates, uses, and can radiate radio frequency energy and,
if not installed and used in accordance with the instruction manual, may cause
interference to radio communications. It has been tested and found to comply with the
limits for a Class B digital device pursuant to Subpart B of Part 15 of FCC Rules, which
are designed to provide reasonable protection against such interference when operated
in a commercial environment. Operation of this equipment in a residential area is likely
to cause interference, in which case the user, at his own expense, will be required to take
whatever measures are required to correct the interference.
You may unshielded twisted-pair (UTP) cable for RJ-45 connections.
You are cautioned that changes or modifications not expressly approved by the party
resposible for compliance could void your authority to operate the equipment.
• Reorient or relocate the receiving antenna
• Increase the separation between the equipment and receiver
• Connect the equipment into an outlet on a circuit different from the one which the receiver is
connected to
• Consult the dealer or an experienced radio/TV technician for help
Regulatory Standards Compliance
D-1
Fast EtherHub-8s User’s Guide
Warnings 1. Wear an anti-static wrist strap or take other suitable measures to
prevent electrostatic discharge whenever handling this equipment.
2. When connecting this hub to a power outlet, connect the field ground
lead on the tri-pole power plug to a valid earth ground line to prevent
electrical hazards.
You may find the following booklet prepared by the Federal Communications
Commission helpful:
The Interference Handbook
This booklet is available from the U.S. Government Printing Office. Washington, D.C.
20402. Stock No. 004-000-00345-4.
Note: In order to maintain compliance with the limits of a Class B digital device, Accton
requires that you use a quality interface cable when connecting to this device. Changes
or modifications not expressly approved by Accton could void the user’s authority to
operate this equipment. Suggested cable type is: 100W Category 5 STP or UTP
VCCI Class B compliance
This product also complies with CISPR22 Class B (EN55022 Class B).
EN55022 Declaration of Conformance
This is to certify that the Accton Ethernet Hub is shielded against the generation of radio
interference in accordance with the application of Council Directive 89/336/EEC,
Article 4a. Conformity is declared by the application of EN55022:1987 Class B
(CISPR 22:1985/BS 6527:1988).
Compliance with the applicable regulations is dependent upon the use of shielded
cables.
D-2
Regulatory Standards Compliance
Fast EtherHub-8s User’s Guide
CE Mark Declaration of Conformance
This is to certify that this product complies with ISO/IEC Guide 22 and EN45014. It
conforms to the following specifications:
EMC:
EN55022(1988)/CISPR-22(1985)
IEC 1000-4-2
IEC 1000-4-3
IEC 1000-4-4
IEC 1000-4-6
class B
4kV CD, 8kV AD
3V V/m
1kV - (power line)
0.5kV - (signal line)
3Vrms
This product complies with the requirements of the Low Voltage Directive 73/23/EEC
and the EMC Directive 89/336/EEC.
Warning!
Do not plug a phone jack connector into the RJ-45 port. This may damage the hub.
Les raccordeurs ne sont pas utilisé pour le système téléphonique!
Regulatory Standards Compliance
D-3
Fast EtherHub-8s User’s Guide
Safety Compliance
Underwriters Laboratories Inc.
Important! Before making connections, make sure you have the correct Cord Set.
Check it (read the label on the cable) against the following specification list.
Operating Voltage
Cord Set Specifications
120 Volts
240 Volts (For North America)
240 Volts (For Europe only)
UL Listed/CSA Certified Cord Set
Minimum 18 AWG
Type SVT or SJT three conductor cord
Maximum length of 15 feet
Parallel blade, grounding type attachment plug rated 15A, 125V
UL Listed/CSA Certified Cord Set
Minimum 18 AWG
Type SVT or SJT three conductor cord
Maximum length of 15 feet
Tandem blade, grounding type attachment plug rated 15A, 125V
Cord Set with H05VV-F cord having three conductors with minimum
diameter of 0.75 mm2
IEC-320 receptacle
Male plug rated 6A, 250V
The unit will automatically select the setting that matches the input voltage connected.
Therefore, no additional adjustments are necessary when connecting it to any input
voltage within the range marked on the rear panel.
D-4
Regulatory Standards Compliance
Fast EtherHub-8s User’s Guide
Wichtige Sicherheitshinweise
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
Bitte lesen Sie diese Hinweise sorgfältig durch.
Heben Sie diese Anleitung für den späteren Gebrauch auf.
Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. Verwenden Sie keine Flüssigoder Aerosolreiniger. Am besten eignet sich ein angefeuchtetes Tuch zur Reinigung.
Die Netzanschlu ßsteckdose soll nahe dem Gerät angebracht und leicht zugänglich sein.
Das Gerät ist vor Feuchtigkeit zu schützen.
Bei der Aufstellung des Gerätes ist auf sicheren Stand zu achten. Ein Kippen oder Fallen
könnte Beschädigungen hervorrufen.
Die Belüftungsöffnungen dienen der Luftzirkulation, die das Gerät vor Überhitzung schützt.
Sorgen Sie dafür, daß diese Öffnungen nicht abgedeckt werden.
Beachten Sie beim Anschluß an das Stromnetz die Anschlußwerte.
Verlegen Sie die Netzanschlußleitung so, daß niemand darüber fallen kann. Es sollte auch
nichts auf der Leitung abgestellt werden.
Alle Hinweise und Warnungen, die sich am Gerät befinden, sind zu beachten.
Wird das Gerät über einen längeren Zeitraum nicht benutzt, sollten Sie es vom Stromnetz
trennen. Somit wird im Falle einer Überspannung eine Beschädigung vermieden.
Durch die Lüftungsöffnungen dürfen niemals Gegenstände oder Flüssigkeiten in das Gerät
gelangen. Dies könnte einen Brand bzw. elektrischen Schlag auslösen.
Öffnen sie niemals das Gerät. Das Gerät darf aus Gründen der elektrischen Sicherheit nur
von authorisiertem Servicepersonal geöffnet werden.
Wenn folgende Situationen auftreten ist das Gerät vom Stromnetz zu trennen und von einer
qualifizierten Servicestelle zu überprüfen :
a. Netzkabel oder Netzstecker sind beschädigt.
b. Flüssigkeit ist in das Gerät eingedrungen.
c. Das Gerät war Feuchtigkeit ausgesetzt.
d. Wenn das Gerät nicht der Bedienungsanleitung entsprechend funktioniert oder Sie mit
Hilfe dieser Anleitung keine Verbesserung erzielen.
e. Das Gerät ist gefallen und/oder das Gehäuse ist beschädigt.
f. Wenn das Gerät deutliche Anzeichen eines Defektes aufweist.
Der arbeitsplatzbezogene Schalldruckpegel nach DIN 45 635 Teil 1000 beträgt 70dB(A) oder
weniger.
Regulatory Standards Compliance
D-5
Appendix E:
Product Support Services
Product Registration
Fill in the Owner Registration Card and mail it to Accton Technology Corporation.
Accton will keep your record and inform you of any new Accton unit developments.
Problem Report
If problems occur during unit operation, please check the adapter configuration settings,
cables, connectors, network terminators, hardware compatibility and other network
components.
Write a description of the problem, including what problems occurred, when they
occurred, duration of the problems, the unit number, serial number, hardware, software
and the DOS version that you are using. Then contact your dealer or Accton Technology
Corporation for assistance.
Hardware Repair Service
You must get an RMA (Return Materials Authorization) number before returning any
hardware for repair. To obtain this number please inform Accton of your company
name, address, unit name and model number, contact person, telephone number, and a
problem description list. If your unit is under repair warranty you must also give your
purchase date. Carefully pack your hardware. If possible, use the original carton. Mark
the RMA number on the carton and send it to your dealer.
Product Support Services
E-1
Fast EtherHub-8s User’s Guide
After repair, Accton will inform you of the date of delivery and the exact amount due.
Please send the payment by T/T (Telegram Transfer), and Accton will send you the
fixed component after receiving payment. With or without warranty, if the hardware is
found to be free of defects, you will only be charged for testing and handling.
Bulletin Board Service (BBS)
• In countries other than the U.S., call 886-3-5770-654 to reach Accton Taiwan’s
modem line. Modems with 14400 through 2400 baud are supported. Choose 8 data
bits, 1 stop bit and no parity. Standard VT100 terminal emulation is supported
• In the United States, call 408-452-8828 to reach the Accton USA’s BBS line.
Modems with 14400 through 2400 baud are supported. Choose 8 data bits, 1 stop bit
and none parity. Standard VT100 terminal emulation is supported.
Interactive Fast Fax (U.S.A. Office)
Printed technical documentation can be FAX’ed to your FAX machine, 24-hours a day.
• Call 408-452-8811 to reach Accton’s interactive Fast FAX service. You will need a
Touch-Tone phone and a FAX machine (or equivalent). Choose document 911 for a
listing of technical bulletins.
E-2
Product Support Services
Fast EtherHub-8s User’s Guide
Technical Support
Your dealer or installer is the person who understands your network and Accton units.
If neither is available to help you, Accton technical support engineers are available by
FAX, mail or phone.
• Send your technical questions by FAX to:
International Headquarters: 886-3-5770-267
USA Headquarters: 408-452-8988
• To obtain software upgrades connect via ftp to ftp.accton.com.tw
• Send your technical questions by email to [email protected]
• Mail your technical questions to:
International Headquarters
Accton Technology Corporation
Attn: Technical Support
No. 1 Creation Road III
Science-based Industrial Park
Hsinchu 300, Taiwan, R.O.C.
USA Headquarters
Accton Technology
Corporation
Attn: Technical Support
1962 Zanker Road,
San Jose, CA 95112, U.S.A.
During local business hours, call:
International Headquarters
(Monday through Friday,
8 am to 6 p.m.):
886-3-5770-270
USA Headquarters
(Monday through Friday,
7 am to 5 p.m. Pacific Time):
408-452-8900 or 800-926-9288
Product Support Services
E-3
Fast EtherHub-8s User’s Guide
Limited Warranty
Accton warrants to the original owner that the product delivered in this package will be free from
defects in material and workmanship for the lifetime of the product. For the warranty to apply, you
must register your purchase by returning the registration card indicating the date of purchase and
including proof of purchase. There will be a minimal charge to replace consumable components, such
as fuses, power transformers, and mechanical cooling devices. The warranty does not cover the product
if it is damaged in the process of being installed. Accton recommends that you have the company from
whom you purchased this product install it.
THE ABOVE WARRANTY IS IN LIEU OF ANY OTHER WARRANTY, WHETHER EXPRESS,
IMPLIED OR STATUTORY, INCLUDING BUT NOT LIMITED TO ANY WARRANTY OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR ANY WARRANTY
ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE. ACCTON SHALL NOT BE
LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. ACCTON NEITHER ASSUMES
NOR AUTHORIZES ANY PERSON TO ASSUME FOR IT ANY OTHER LIABILITY.
Customer Remedies
If the product is found to be defective within the first two years from the later of date of purchase or
date of manufacture, Accton’s entire liability and your exclusive remedy for any breach of warranty,
shall be, at its option, to repair or replace the product at no charge except as set forth below. If the
product is found to be defective after two years from the later of date of purchase or date of
manufacture, Accton will charge a process and handling fee, provided that you deliver the product along
with a return material authorization (RMA) number either to the company from whom you purchased it
or to Accton. Accton warrants the repaired or replaced product to be free from defects in material and
workmanship for the remainder of the original product’s warranty period. Consumable components are
warranted only for two years.
E-4
Product Support Services
Fast EtherHub-8s User’s Guide
Return Process
Before you may return any Accton product to Accton, you must request an RMA number by calling,
FAXing or writing Accton’s Service Department at the address listed below. If you ship the product,
you must assume the risk of damage or loss in transit. You must use the original container (or the
equivalent) and pay the shipping charge. Accton may replace or repair the product with either a new or
reconditioned product, and the returned product becomes Accton’s property. At Accton’s sole
discretion, Accton will issue a credit for either a comparable replacement Accton product or credit the
original purchase price towards the purchase of any Accton product for any unrepairable, defective
product.
This warranty does not cover replacement of products damaged by abuse, accident, misuse, neglect,
alteration, repair, disaster, improper installation or improper testing.
ACCTON SHALL NOT BE HELD LIABLE FOR ANY LOSS OF PROFITS, LOSS OF USE,
INCIDENTAL, CONSEQUENTIAL OR SPECIAL DAMAGES CAUSED BY THE USE OF THIS
PRODUCT OR INABILITY TO USE IT, EVEN IF THE COMPANY OR ACCTON HAS BEEN
ADVISED OF SUCH LIABILITY OR OTHER SPECIAL CLAIMS.
If you purchased this product in the USA, be aware that some states do not allow limitations on how
long an implied warranty lasts, so the above limitations may not apply to you. Some states do not allow
the exclusion or limitation of incidental or consequential damages, so the above limitations or
exclusions may not apply to you. This warranty gives you specific legal rights and you may have other
rights which vary from state to state. All parts or components contained in this product are covered by
Accton’s Limited Lifetime Warranty for this product. The product may contain fully tested, recycled
parts, warranted as if new.
For warranty information:
All territories except North and South America:
Accton Technology Corporation, International Headquarters
No. 1, Creation Rd. III, Science-based Industrial Park, Hsinchu 300, Taiwan, R.O.C.
Phone: 886-3-5770-270 Fax: 886-3-5770-267 BBS: 886-3-5770-654
North and South America:
Accton Technology Corporation, USA Headquarters
1962 Zanker Road, San Jose, CA 95112, U.S.A.
Phone: 408-452-8900
Fax: 408-452-8988
BBS: 408-452-8828
Product Support Services
E-5
Fast EtherHub-8s User’s Guide
Accton Offices
Accton Australia,
Level 6, 10 Help Street,
Chatswood, N.S.W. 2067, Australia
Phone: 61-2-9410-9860
Fax: 61-2-9410-9861
Accton Technology Corporation
International Headquarters,
No. 1 Creation Rd. III,
Science-based Industrial Park,
Hsinchu 300, Taiwan, R.O.C.
Hsinchu: Phone: 886-3-5770-270,
Fax: 886-3-5770-267, 886-3-5775-541
BBS: 886-3-5770-654
Taipei: Phone: 886-2-577-1220 to 9
Fax: 886-2-577-0816
Accton Japan,
Yokohama Landmark Tower, 17F,
2-1-1, Minatomirai 2-Chome, Nishi-ku,
Yokohama 220-81, Japan
Phone: 81-45-224-2332
Fax: 81-45-224-2331
Accton USA,
1962 Zanker Road,
San Jose, CA 95112, USA
Phone: 408-452-8900, 408-452-8080
Fax: 408-452-8988
BBS: 408-452-8828
FAST FAX: 408-452-8811
Accton UK,
The Mill Horton Road,
Stanwell Moor,
Staines. Middx. TW19 6BJ United Kingdom
Phone: 44-1753-687677, 44-1753-680109
Fax: 44-1753-689010
Ordering Information
• Fast EtherHub-8s (EH3042S-TX)
E-6
Fast Ethernet Hub with 8 100BASE-TX ports
Product Support Services
Glossary
100BASE-TX
IEEE’s specifications for 100 Mbps Ethernet using twisted-pair cable (100W STP or
UTP). The maximum length of cable for a point-to-point connection is 100 meters 328
feet).
Collision
A condition in which two packets transmitted over a medium interferes with each other.
Their interference makes both unintelligible.
Configuration
The way to set up a computer, server, or local area network.
Connection
A logical binding between two or more users of an interconnection service.
Daisy-Chain Port
An MDI RJ-45 port used to cascade compatible devices in a daisy-chain configuration
using straight-through twisted-pair cable. To cascade two devices, either run a connection from the daisy-chain port on one device to a station port on the other device, or
cascade the two devices by running crossover cable between MDI-X station ports on
both devices.
Ethernet
A network communication system developed and standardized by DEC, Intel, and
Xerox, using baseband transmission, CSMA/CD access and logical bus topology, and
coaxial cable. The successor IEEE 802.3 standard provides for integration into the OSI
model and extends the physical layer and media with repeaters and implementations that
operate on fiber optics, baseband, and twisted-pair.
Glossary
1
Fast EtherHub-8s User’s Guide
Fast Ethernet
100 Mbps network communication system based on Ethernet and the CSMA/CD access
method.
IEEE 802.3 Standard
Standard for the physical and electrical connections in local area networks developed by
the IEEE. The IEEE 802.3u standard covers these same issues for 100 Mbps networks.
LED
Light emitting diode on the front panel of the hub used for monitoring a hub or network
condition. An LED display corresponds to a hub condition.
Local Area Network (LAN)
A group of interconnected computers and support devices.
MDI Port (Medium Dependent Interface)
MDI is the IEEE standard for the twisted-pair interface to 10BASE-T. This RJ-45 port
can be used with straight-through cable to connect the hub to a network interconnection
device, such as another hub or a switch. Pin-out assignments are shown in Appendix B.
MDI-X Port (Medium Dependent Interface - Crossed)
This RJ-45 port, which crosses the receive and transmit signals internally, can be used
with straight-through cable to connect the hub to any device that has a standard network
interface (e.g., workstation, server, bridge or router). Pin-out assignments are shown in
Appendix B.
RJ-45 Connector
Most common terminator for twisted-pair wiring.
2
Glossary
Fast EtherHub-8s User’s Guide
Shielded Twisted-Pair (STP)
Twisted-pair wire covered with an external aluminum-foil or woven-copper shield
designed to reduce excessive noise pick up or radiation. The STP cable refered to in
this manual is also sometimes called screened twisted-pair (ScTP). Its impedance is
100W and has the same pin assignment as UTP. This cable should not be confused with
the older 150W cable type designed by IBM.
Star Topology
Physical connections for this hub are limited to a star configuration (i.e., similar to a hub
and spoke arrangement). This topology also requires that only one path exists between
any two nodes, and that data transmitted by any node is concurrently available to all
other nodes within the same local network (i.e., immediate collision domain).
Station Port
The MDI-X port can be used for connecting the hub to any device that has a standard
network interface (e.g., workstation, server, bridge or router).
Unshielded Twisted-Pair (UTP)
Cable composed of two insulated wires twisted together to reduce electrical
interference; used in common telephone cord.
Glossary
3
Index
A
G
Accton's Fast EtherHub-8s • 1-1
Automatic Partitioning • 1-3
Automatic Polarity Detection • 1-3
Guidelines for Multiple Hub Configuration •
3-3
H
C
Hardware Description • 4-1
Certification • C-1
Class II Repeater • 2-3, 3-3
Configuring the Network • 3-1
Connecting Multiple Hubs • 3-2
Connecting the Hub System • 2-2
Connection
Verifying • 2-5
Crossover Cable • B-1
I
IEEE 802.3u Standard • 2-3, 3-3
Indicator Panel • 4-1
Installation Requirements • 2-1
Installing the System • 2-1
Inter-hub Cabling Limit • 3-3
Introduction to Fast Ethernet • 1-1
D
Daisy-Chain Port
Usage • 3-2
Distance Limit for Fast Ethernet Cabling • 2-3
J
Jabber Lock-up • 1-3
L
E
LED Indicators
Alert • 4-2
Collision% • 4-3
Link • 4-4
Partition • 4-4
Power • 4-2
Traffic • 4-5
Utilization% • 4-3
Limited Warranty • E-4
Link Indicator • 2-5
EMI Certification • D-1
Ethernet Ports • 4-5
F
Fast EtherHub-8s • 1-1
FCC Warning • D-1
Front Panel • 4-1
Index
1
Fast EtherHub-8s User’s Guide
Interfaces • C-1
Media Supported • C-1
Power System • C-1
Standards Conformance • C-1
Stand-alone Configuration • 3-1
Standards Compliance • D-1
M
MDI Daisy-chain Port • 3-2
N
Network Connection
MDI Daisy-Chain Port • 2-3
MDI-X Station Port • 2-2
T
P
Port and Cable Assignments • B-1
Port Status Indicators • 4-4
Power Cord Specifications • D-4
Power Socket • 4-6
Product Features • 1-2
Product Support Services • E-1
Accton Offices • E-6
Bulletin Board Service • E-2
Hardware Repair Service • E-1
Interactive Fast Fax • E-2
Ordering Information • E-6
Technical Support • E-3
Providing Power to the SwitcHub • 2-4
R
Rear Panel • 4-6
Repeater Delay • 2-3, 3-3
S
Safety Compliance • D-4
Specifications
Certification • C-1
2
Index
Troubleshooting • 4-5
Configuration • A-3
Hub Indicators • A-1
Installation • A-2
Power and Cooling • A-2
Twisted-pair Cable
Category 3,4,5 • 2-2, A-2
V
Verifying Port Status • 2-4
Verifying System Operation • 2-5
EH3042S-TX
150497-101
E0797-R04
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