Accton Technology 100BASE-TX, 10BASE-T User Manual

SwitcHub-2s

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Installation Manual

SwitcHub-2s

2-Port Ethernet Switching Hub

for 10BASE-T/100BASE-TX

Copyright (c) 1996 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.

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No. 1 Creation Road III,
Science-based Industrial Park
Hsinchu 300, Taiwan, R.O.C.
Phone: [phone]
FAX: [phone]
BBS: 886-35-770-654
Internet: [e-mail]

Accton and SwitcHub 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.

EH3001
E0496-R03
150652-101

86$+HDGTXDUWHUV

1962 Zanker Road
San Jose, CA 95112
Phone: [phone]
FAX: [phone]
BBS: 408-452-8828
FAST FAX: [phone]

About this Guide

This guide is designed for the experienced network installer. It describes how
to install and operate Accton’s Fast SwitcHub-2s Ethernet switch. 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:

ì Product description, summary of important features and specifications
ì Brief description of the SwitcHub-2s
ì Description of significant components of the unit including LED indicators,

ports and buttons

ì System setup and configuration

About this Guide i

Package Contents

Carefully unpack the contents of the package and verify them against the checklist
given below.

Package Checklist

æ SwitcHub-2s (Model No. EH3001-TX)
æ AC power cord
æ Installation manual
æ Owner 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 iii

Quick Installation

The SwitcHub-2s contains 2 Ethernet ports, each of which supports 100BASE-TX
or 10BASE-T connections, operating at full or half-duplex. The smart design
built into the front display panel and configure options, 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
switch as described below:

1. Unpack the SwitcHub-2s.

2. Find a location close to the network devices you need to connect, and within

easy reach of an electrical outlet.

3. Connect workstations or servers to the MDI-X station ports.

4. Connect to other hubs via the MDI port.

5. Set the transmission mode for each port to full or half-duplex.

6. Verify network communications by ensuring that -

• you have made all the necessary connections

• you can access any connected resources

• the hub’s indicator LEDs are functioning properly

Note: For devices connected directly to either port on the switch, it will

automatically detect transmission speed (10/100 Mbps). However, unless
the connected devices are operating at half-duplex (i.e., system default), you
will have to manually set the transmission mode via the configure button.
(Refer to Full/Half Duplex Mode Selection in Chapter 2).

If you encounter any problem s in installing the SwitcHub-2s, refer to Chapter 3 for
a detailed description of installation procedures, or to Appendix A for help in
troubleshooting.

Quick Installation v

Contents

Chapter 1: Introduction...........................................................1-1

Switching Technology...............................................................................................1-1

Accton’s Smart Extender (The Fast SwitcHub-2s)....................................................1-2

Features of the Fast SwitcHub-2s..............................................................................1-4

Chapter 2: Hardware Description ..........................................2-1

Front Panel ...............................................................................................................2-1

Configure Button..................................................................................................2-2

SmartWatch LED Panel........................................................................................2-3

Power..............................................................................................................2-3

Statistical Display for System Performance....................................................2-4

Setting the Communication Mode ..................................................................2-6

Diagnostics Display Mode..............................................................................2-7

Port Status Display..........................................................................................2-8

Rear Panel ...............................................................................................................2-10

Ethernet Ports.......................................................................................................2-10

Power Socket........................................................................................................2-10

Chapter 3: Setup and Configuration......................................3-1

Pre-Installation Requirements ...................................................................................3-1

Connecting the Hub System......................................................................................3-2

Server/Workstation Connection............................................................................3-2

Daisy-Chain Connection.......................................................................................3-3

Providing Power to the SwitcHub.............................................................................3-4

Diagnostic Tests........................................................................................................3-4

vii

SwitcHub-2s User’s Guide

Setting the Display Mode..........................................................................................3-5

Selections Available.............................................................................................3-6

Bandwidth Utilization.....................................................................................3-6

Packet Forwarding Ratio.................................................................................3-6

Packet Filtering Ratio .....................................................................................3-6

Collision Ratio................................................................................................3-6

Full/Half Duplex Mode Selection...................................................................3-7

Diagnostic Function........................................................................................3-7

Verifying Port Status.................................................................................................3-8

Verifying System Operation......................................................................................3-8

Appendix A: Troubleshooting................................................A-1

Diagnosing Hub Indicators........................................................................................A-1

System Diagnostics ...................................................................................................A-2

Installation............................................................................................................A-2

Configuration........................................................................................................A-2

Hub Integrity ........................................................................................................A-3

Ap p e ndix B: Port and Cable Assignm e nts.............................B-1

RJ-45 Port ...............................................................................................................B-1

Appendix C: Specifications....................................................C-1

Product Specifications...............................................................................................C-1

Appendix D: Regulatory Standards Compliance.................. D-1

EMI Warning ............................................................................................................D-1

FCC Class B Certification....................................................................................D-1

Voluntary Control Council for Interference (VCCI-2).........................................D-3

EN55022 Declaration of Conformance ................................................................D-3

Safety Compliance.....................................................................................................D-4

Underwriters Laboratories Compliance Statement...............................................D-4

Sicherheitshinweise..............................................................................................D-5

viii Contents

SwitcHub-2s User’s Guide

Appendix E: Product Support Services ................................ E-1

Product Registration..................................................................................................E-1

Problem Report .........................................................................................................E-1

Hardware Repair Service...........................................................................................E-1

Software Update and Upgrade Service......................................................................E-2

Bulletin Board Service (BBS) ...................................................................................E-2

Interactive Fast Fax (U.S.A. office) ..........................................................................E-2

Technical Support .....................................................................................................E-3

Limited Warranty......................................................................................................E-4

Customer Remedies..............................................................................................E-4

Return Process......................................................................................................E-5

Accton Distributors ...................................................................................................E-6

Ordering Information ................................................................................................E-6

Glossary
Index

List of Figures

Figure 2.1 The SwitcHub-2s Front Panel ................................................................2-1

Figure 2.2 SmartWatch LED Panel .........................................................................2-3

Figure 2.3 The SwitcHub-2s Rear Panel .................................................................2-10

Figure B-1 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: Introduction

Switching Technology

The Ethernet Switch allows simultaneous transmission of multiple packets via
an internal high-speed data channel. This means that it can partition a network
more efficiently than bridges or routers in most environments. The Ethernet
Switch is therefore fast being recognized as one of the most important building
blocks for today’s networking technology.

The learning function in the switching hub stores the address and
corresponding port number of each incoming and outgoing packet in a routing
table. This information is subsequently used to filter packets whose destination
address is on the same segment as the source address. This confines network
traffic to its respective domain, reducing the overall load on the network.

The switch scans the destination address from the packet header, searches the
routing table provided for the incoming port and forwards the packet only if
required, often before fully received. This fast forwarding makes the switch
attractive for connecting servers directly to the network, thereby increasing
throughput and availability. However, the switch is most commonly used to
segment existing hubs, which nearly always improves overall performance. A
switching hub can be easily configured in any Ethernet network to significantly
boost bandwidth using conventional cabling and adapters.

1-1

SwitcHub-2s User’s Guide

Accton’s Smart Extender (The Fast SwitcHub-2s)

Accton’s Smart Extender can boost network bandwidth fourfold, depending on
your configuration (i.e., if running at 100Mbps and full-duplex operation for
both ports). It provides two 10/100 Mbps RJ-45 ports (set at full or half-duplex)
to connect to either a subnetwork, or directly to a server or key workstation. In
addition to partitioning an overloaded network, it provides connection between
legacy 10BASE-T networks and the newer generation 100BASE-TX, and can
be configured to operate in either full-duplex or half-duplex data transfer mode
to support the interconnection requirements of other high-speed devices.

This switching hub performs "on-the-fly" cut-through switching, which sends a
packet to the other port according to the destination address scanned from the
packet header. This technique reduces the latency of packet transmission to 20
microseconds or less. Compared to approximately 800 microseconds for a
bridge or 1800 microseconds for a router, both of which have to store the entire
packet before the it can be forwarded, the SwitcHub can deliver a quantum
improvement in your network’s performance.

As a device functioning on the media access control (MAC) layer, the
SwitcHub is protocol independent, and therefore compatible with IEEE802.3,
IEEE802.3u, TCP/IP, NetWare, DECnet and XNS protocols. Accton’s Smart
Extender can be configured as a 2-port bridge for a 10BASE-T environment; it
can provide a connection between conventional 10BASE-T and high-speed
100BASE-TX networks; or can serve as a 2-port bridge in a 100BASE-TX
environment. Moreover, where traditional 100BASE-TX networks restrict the
maximum distance between end-nodes to 205 meters, the Smart Extender
breaks down this barrier. By breaking your network into smaller and more
manageable segments, each linked to the larger network with a switch, the
maximum distance for communications between end-nodes is unlimited.

1-2 Introduction

SwitcHub-2s User’s Guide

Traditional bridges and routers use a switching method called store-and­forward in which the entire frame must be received before the bridge can

perform a table look-up for the destination node and forward the packet to the
corresponding port. As a result, each packet is delayed by approximately 800
microseconds. It may be necessary to use store-and-forward when a lot data
errors are occurring over the network, or when connecting to very slow devices.

Compared to this “safe” mode of operation, cut-through reduces the packet
transmission delay to around 20 microseconds by picking the destination
address out of the header as soon as its received, and directing the frame to the
appropriate port long before the full packet has been received. The remaining
technique, employed to improve data reliability, is called fragment-free cut-
through. It uses a more conservative approach to cut-through that waits until
the collision window has elapsed (i.e., the first full 64 bytes has been received)
before processing the packet. This prevents runts from being passed along,
effectively cleaning up the data stream.

Although cut-though switching is recommended as the fastest method for most
applications, the other methods mentioned above are also supported by the
SwitcHub-2s to guarantee flawless performance. To ensure that you can
manage any kind of network load, the Smart Extender uses adaptive cut-
through switching based on Accton’s smart algorithm. This method
dynamically changes the way it handles data passing through the switch based
on the current error rate. These switching alternatives start at standard cut­through for a clean data environment, change to fragment-free cut-through for a
moderate error rate, and then progress to store-and-forward for a highly
contentious environment. By using this method, the SwitcHub-2s delivers the
best networking performance under any environment.

Introduction 1-3

SwitcHub-2s User’s Guide

Features of the Fast SwitcHub-2s

• Conforms to the IEEE 802.3 and IEEE 802.3u specifications, as well as

10BASE-T and 100BASE-TX standards

• Provides two independent RJ-45 10BASE-T / 100BASE-TX Ethernet station

ports, where each logical port consists of 1 MDI port (for connection to hubs

or switches) and 1 MDI-X port (for connection to workstations or servers),

eliminating the need for crossover cables

• Both ports support full-duplex and half-duplex operation

• Total bandwidth of up to 200 Mbps (when full-duplex mode is used)

• Auto-senses transmission speed (10/100 Mbps)

• Uses adaptive cut-through switching (which dynamically changes among

standard cut-through, fragment free cut-through, and store-and-forward

depending on the error rate)

• Uses back pressure to eliminate frame loss by "blocking" traffic from end

stations or segments connected directly to the switch when its buffers fill

• Minimum latency of packet transmission (leading edge to leading edge) less

than 20 microseconds when using cut-through switching

• Uses "on the fly" cut-through technique to transport packets

• Transparent bridging function supported

• Address learning function to build the routing information database

• Operates at maximum packet filtering and forwarding rate

1-4 Introduction

SwitcHub-2s User’s Guide

• Provides frame filtering and forwarding functions for each port, which are

capable of filtering and forwarding 100% of all Ethernet packets at line

speed

• Provides a 160K byte buffer per port

• Routing table contains 4K entries per port to store node MAC addresses

• Uses fast hashing scheme to retrieve information from routing table when

making routing decisions

• An indicator panel for configuring the system or monitoring the overall

condition of the switch, including utilization, forwarding and collision rates

Introduction 1-5

Chapter 2: Hardware Description

Accton’s SwitcHub-2s is a highly reliable network switch that complies with
IEEE 802.3 (10BASE-T) and IEEE 802.3u (100BASE-TX) specifications.
This switching hub delivers superior performance compared to the bridge and
router solution, and at a much lower cost. By confining local traffic to the
originating segment, and only forwarding cross-segment traffic to the other
port, this hub meets the requirements for Ethernet and IEEE 802.3 networks.

This chapter describes the hardware features of Accton’s SwitcHub-2s. For
easier management and control of the hub, familiarize yourself with the display
indicators, ports and configure button. Front and rear panel illustrations in this
chapter display the unit’s LED indicators, configure button and ports. Before
connecting any network device to the hub, read this chapter carefully.

Front Panel

The unit’s front panel provides a simple interface for configuring or monitoring
the switching hub. It includes a configure button, power indicator, display
mode indicators, port status indicators, and a statistical display for network
traffic as shown below.

Figure 2.1 The SwitcHub-2s Front Panel

2-1

SwitcHub-2s User’s Guide

Configure Button

The Configure button is located on the left front panel. This button is used to
select the following configuration functions:

• System Performance (displays relative bandwidth utilization rate, forwarding

ratio, filtering ratio, and collision ratio for each port)

• Full/Half Duplex (sets port communication mode to full-duplex or half-

duplex operations)

• Diagnostics (tests the status of various system components)

To set system performance or diagnostic mode

1. To start configuration use a "long press" on the Configure button. The

indicators will light up to show the selected configuration function. (Refer

to the related sections in this chapter and in Chapter 3 for complete details.)

2. To scan through the configuration functions use a "short press" on th e

Configure button. (For information on how to select Full/Half duplex

communications, refer to Chapter 3.)

3. To accept and implement the current settings use a "long press" on the

Configure button.

"Long press" means pressing the Configure button for more than 2 seconds and

F

then releasing it. While "Short press" means pressing the Configure button and
immediately releasing it. Also, note that if this button is not pressed within 10
seconds, the system returns to normal operation.

2-2 Hardware Description

–

SwitcHub-2s User’s Guide

SmartWatch LED Panel

The comprehensive LED array on the front panel (1) shows if the unit is
receiving power, (2) indicates the current display mode, (3) displays network
performance for each port, (4) indicates the status of port connections, and (5)
shows the result of diagnostic tests. The following figure shows the LED
indicators, each of which are described in the following sectio ns .

Power

Display Mode Performance Indicators Port Status

Figure 2.2 SmartWatch LED Panel

Power

Color: Green
Label:
Function: Power indicator

LED Activity Condition Indication

STEADY LIGHT ON Unit is receiving power, CPU is running.
NO LIGHT OFF Power is disconnected, no power received.

Power

Hardware Description 2-3

SwitcHub-2s User’s Guide

Statistical Display for System Performance
(Utilization, Forward, Filter & Collision Display Mode)

Display



Mode

Port 1
Port 2
Value








Statistical
Indicators

Color: Green and Orange
Active LEDs: LED rows labeled

1 and 2

Function: Indicates a functional value for each port depending on the selected

display mode. (Refer to the

Configure Button section earlier in this

chapter for instructions on how to select the display mode.)

Label (%) Color Indication

90+ Orange

70 Orange of LAN bandwidth.
50 Orange
35 Green that are forwarded to another port.
20 Green
10 Green filtered because destination is in the current segment.

5 Green
1 Green occurring out of the total packets transmitted by the port.

Util% Display Mode - The utilization percentage

Forward% Display Mode - The percentage of packets

Filter% Display Mode - The percentage of packets

Coll% Display Mode - The percentage of collisions

Utilization Display Mode - (Util%) The statistical indicators show the percentage of valid

data passing through each port compared to overall network bandwidth (updated
every 0.5 seconds). There are 8 LEDs representing the percentage of network
utilization. The corresponding LEDs light up to show that the utilization of LAN
bandwidth has reached this percentage. When active, these LEDs behave like a
stereo’s equalizer display.

2-4 Hardware Description

SwitcHub-2s User’s Guide

For example, if network utilization reaches 1%, the LED labeled 1% will light up.
However, if network utilization rises above 1% (e.g., 35%), the LED labeled 35
and all the other LEDs before it (i.e., 1, 5, 10 and 20) will also light up in rapid
succession. These indicators monitor the share of valid network frames handled
by each port within a 10Mbps or 100Mbps bandwidth, depending on the Ethernet
type currently selected on the back panel. They provide a quick way to monitor
the current traffic load relative to the network’s capacity.

Forward Display Mode (Forward%) - The statistical indicators show the percentage of

packets that must be forwarded by bridging hardware to the other port on the
switching hub (i.e., another LAN segment or connected workstation). When
viewing the

Forward% indications, remember that under normal conditions, the

SwitcHub forwards 100% of all Ethernet packets that must be transferred among
the connected LAN segments at line speed.

Filter Display Mode (Filter%)- The statistical indicators show the percentage of

packets that must be filtered from the switching hub by bridging hardware
because the destination address is on the same segment connected to the
receiving port. When viewing the

Filter% indications, remember that under

normal conditions, the SwitcHub filters 100% of all Ethernet packets that
belong to the local LAN segments at line speed.

Collision Display Mode (Coll%)- The statistical indicators show the percentag e of pack et

collisions occurring out of the total packets transmitted by the port. C ollisions
occur when two or more devices connected to a hub attempt to transm it data
simultaneously on the network. When a collision occurs, dev ices 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 each port.
The collision indicators are labeled by row to indicate the percentage of
collisions encountered by the corresponding port. When collisions reach a

Hardware Description 2-5

SwitcHub-2s User’s Guide

level marked on the front panel display, the corresponding LED lights up. For
example, if packet collision reaches 1%, the LED labeled 1% will light up.
However, if collisions go beyond 1% (e.g., 30%), the LED labeled 30

+

% and all

the other LEDs before it (i.e., 1, 5, 10 and 20) also light up in rapid succession.

Setting the Communication Mode (Full/Half Duplex)

Color: Green
Active LEDs:

Full/Half (Display Mode LED)
Full (Port Status LED)

Function: The com munication mode can be s e t t o e it h e r f u ll -duplex or half-

duplex operation. Use the Configure button to light the

Full/Half

Display Mode LED, indicating that the transmission mode may now
be set for the ports. Next set the Port Status LED for the correspond­ing port in the LED column labeled

Full/Half (Display Mode LED) Condition Indication

STEADY LIGHT ON Transmission mode selection enabled.
NO LIGHT OFF Transmission mode selection disabled.

Full (Port Status LED) Condition Indication

STEADY LIGHT ON Port is set for full-duplex operation.
NO LIGHT OFF Port is set for half-duplex operation.

Notes:

1. Full-duplex mode is supported for both ports.

2. Full-duplex operation only applies to point-to-point access (e.g., when
attaching the SwitcHub to a workstation, server, or another switch). Repeater
hubs use a common collision domain for all communications, and therefore
cannot support full-duplex mode. When connecting the SwitcHub to a repeater
hub, use a standard cascaded connection set for half-duplex communications.

Full as indicated below.

2-6 Hardware Description

SwitcHub-2s User’s Guide

Diagnostics Display Mode

Color: Green
Active LED:

Diag

Function: Indicates that the system is in Diagnostic mode. (Refer to the

Configure Button section earlier in this chapter for instructions on

how to select the display mode.)

After power on, the hub automatically performs a self- diagnostic test. This test is
done in two stages. The first stage is the System Diag nostic Test, and the second
stage is the Port Diagnostic Test. If a problem is detected, the current diag nostic
process (i.e., system or port test) will continue until completed. If the test is not
completed successfully, the corresponding LEDs (described below) w ill flash
after test completion to indicate which component failed the test.

System Diagnostic Test

The following table d escribes th e system level failures and corresponding
indicators. If a problem is detected, the Statistical Indicators in the eig h th colum n

+

90

) in both rows will flash to indicate that the device failed the test. The

(
following indicator will also flash to indicate the failure condition.

LED Indicator

(Row, Column)

1,1 (1%) Green System ROM
1,2 (5%) Green System EEPROM

Color Component Tested

Hardware Description 2-7

SwitcHub-2s User’s Guide

Port Diagnostic Test

The Port Diagnostic Test checks all ports. If a problem is detected, an LED in
the corresponding row (which indicates the malfunctioning port) and column
(which indicates the failed component) will light up as shown below.

LED Indicator

(Column)

4 (20%) Green Failed Port IC Test
5 (35%) Green Failed Routing Table Test
6 (50%) Orange Failed Input Queue RAM Test
7 (70%) Orange Failed Output Queue RAM Test

Note: Enabling the Diagnostic function activates tests similar to the one performed upon
power on. After successfully completing diagnostics, the system returns to normal
operation.

Color Diagnostic Test Status

Port Status Display

Port 1



Port 2



Status



Link Status (Link) - Indicates a valid network connection associated with the port.

LED Activity Condition Indication

STEADY LIGHT ON Indicates a valid link has been established on this port.
NO LIGHT OFF No valid link has been established on this port.

Troubleshooting

sponding 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. You should have standard, straight-through cables and not crossover or other
specialized cables.

:

If the Link LED does not light up when a device is connected to its corre-

2-8 Hardware Description

SwitcHub-2s User’s Guide

Transmit (TX) - Indicates outgoing traffic traversing the port.

LED Activity Condition Indication

BLINKING LIGHT ON Indicates the port is transmitting packets; blinking is

proportional to the traffic passing through the port.

NO LIGHT OFF No packets are being transmitted from this port.

Receive (RX) - Indicates incoming traffic entering the port.

LED Activity Condition Indication

BLINKING LIGHT ON Indicates the port is receiving packets; blinking is

proportional to the traffic passing through the port.

NO LIGHT OFF No packets are being received on this port.

Full-Duplex (Full) - Indicates that communications have been set to full-duplex

operation for the indicated port.

LED Activity Condition Indication

STEADY LIGHT ON Port is set for full-duplex operation.
NO LIGHT OFF Port is set for half-duplex operation.

Note: Full-duplex operation only applies to point-to-point access (e.g., when attaching
the SwitcHub to a server or to a workstation). When connecting the SwitcHub to other
compatible hubs, use a standard cascaded connection.

100BASE-TX (100) - Indicates that communications have been set to 100Mbps.

(The transmission speed for any device directly attached to the SwitcHub
is automatically sensed at 10Mbps or 100Mbps.)

LED Activity Condition Indication

STEADY LIGHT ON Port is set for 100BASE-TX connection.
NO LIGHT OFF Port is set for 10BASE-T connection.

Hardware Description 2-9

SwitcHub-2s User’s Guide

Rear Panel

The unit’s rear panel includes two logical Ethernet ports and a full-range power
socket. Although 10BASE-T and 100BASE-TX connections are automatically
sensed by the SwitcHub, you must use the Configure button to set the data
transfer mode to fu ll -duplex or half-duplex operation, as described under

the

Communication Mode in this c h a p te r . Th e fo l lo wing figure shows the rear panel.

Figure 2.3 The SwitcHub-2s Rear Panel

Ethernet Ports

The SwitcHub has 2 logical RJ-45 Ethernet ports – one MDI-X port for
connecting to a workstation or server and one MDI port for connecting to
another network interconnection device, such as a hub or switch. When using
Fast Ethernet, these ports can also be connected to devices such as a high-speed
server or Ethernet backbone. Use straight-through twisted-pair cable to connect
to any of the switching ports.

Setting

Note: Either the Port 1 or Port 2 MDI port can be used as a daisy-chain port to connect
the switching hub to other compatible hubs using straight-through twisted-pair cable .

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.

2-10 Hardware Description

Chapter 3: Setup and Configuration

This chapter provides information on pre-installation requirements, establishing
network connections, and configuring the system.

Pre-Installation Requirements

Before you start making network connections to the SwitcHub, make sure you
can provide the right operating environment, including power requirements,
and proximity to other network devices that are to be connected. Verify the
following installation requirements:

• Power requirements: 100 to 240 VAC at 50 to 60 Hz. The hub’s power

supply automatically detects the input voltage level.

• The SwitcHub should be located in a cool dry place, with at least 10 cm. of

space at the front and back for ventilation.

• 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

3-1

SwitcHub-2s User’s Guide

Connecting the Hub System

The SwitcHub has two logical RJ-45 Ethernet ports. Use twisted pair cable
to connect either of the RJ-45 ports to a server/workstation or to another
compatible hub as described below.

Server/Workstation Connection

1. Prepare the workstations you wish to network. Make sure they have

properly installed 10BASE-T or 100BASE-TX network interface cards.

2. Prepare straight-through twisted- pair cables with RJ-45 plug s at both ends.

Connect one end of the cable to the RJ-45 port of the PC’s network interface
card, and the other end to one of the

Category 5 twisted-pair cable must be used for 100Mbps connections.

Although Category 3, 4 or 5 cable can be used for 10Mbps connections, we
highly recommend using Category 5 cable for these connections to avoid any
unnecessary expense or confusion if you subsequently upgrade to Fast
Ethernet.

3. Set the communication mode via the Configure button to half-duplex or

full-duplex operation to match the network interface card installed in your
computer. (Refer to Setting the Communication Mode in Chapter 2.)

Notes: 1. Make s u r e t h a t t h e l ength of any twisted-pair cable does not ex ceed 100 meters.

2. Do not plug a phone jack connector into the RJ-45 port. This may damage

the hub. Instead, use only twisted-pair cables with RJ-45 connectors that
conform to FCC standards.

MDI-X station ports on the hub.

3-2 Hardware Installation

SwitcHub-2s User’s Guide

Daisy-Chain Connection

1. Pre p ar e Category 5 str a i g h t -thro u g h t w i s t ed -pair c a b le s w i t h R J - 4 5 p l u gs at bo t h

ends. Connect the SwitcHub to another compatible hub using the crossover
port (labeled
both). Also note that as a general rule, the length of twisted-pair cable
should not exceed 100 meters.

2. Set the communication mode via the Configure button to half-duplex or

full-duplex operation to match the connected device. (Refer to

Communication Mode in Chapter 2.)

The IEEE 802.3 standard recommends restricting the number of hubs connected
in a stack via twisted-pair cable to 7; while IEEE 802.3u provides even stricter
recommendations for Fast Ethernet. Therefore, when cascading dev ices other than
the SwitcHub-2s, please refer to the accompany ing documentation for restrictions
on stack size. However, note that because the SwitcH ub break s up the path for
connected devices into separate collision domains, you should not include the
switching hub or connected cabling in your calculations for cascade length
involving other devices.

In contrast to repeater hubs, a cascade of switches breaks up the collision

Note:

domain. The number of switches that can be cascaded is therefore theoretically
unlimited. However, in practice, the length of a cascade may be limited by the
time-out requirements of the particular applications running over the network.

MDI) on either the SwitcHub or on the attached hub (but not

Setting the

Hardware Installation 3-3

SwitcHub-2s User’s Guide

Providing Power to the SwitcHub

1. Power on the hub by plugging the power cord into the power socket at the

rear of the SwitcHub, 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.

3. The SwitcHub performs a self-diagnostic test upon power on. (Note that this

test takes about 50 seconds to complete.) For details about the system self­diagnostic test, refer to the following section.

Diagnostic Tests

Upon Power On

Upon power on, the system performs an internal self-diagnostic test of major
hub components. If any component fails during the test, the hub will try to
complete the diagnostic procedure. Otherwise, the system will hang. For
related information, refer to

The components to be tested include:

• System ROM

• System EEPROM

• Ports 1 - 2

During Normal Operation

You can use the Configure button any time you want to perform a diagnostic
test. When testing begins, the system leaves normal operation. If no problem
is encountered by the diagnostic test, the system automatically returns to
normal operation.

Diagnostics Display Mode in Chapter 2.

3-4 Hardware Installation

SwitcHub-2s User’s Guide

Setting the Display Mode

The Configure button is located on the left front panel. This button is used to
access the following configuration functions in sequence:

•

Bandwidth Utilization The percentage of LAN bandwidth utilized.
Forwarding Ratio The percentage of packets that are forwarded to the

•

other port.

Filtering Ratio The percentage of packets filtered because the

•

destination is in the current segment.

Collision Ratio The percentage of collisions occurring out the total

•

packets transmitted by the port.

Full/Half Duplex Sets port communication mode to full-duplex or half-

•

duplex operation.

Diagnostics Tests the status of various system components.

•

A “long press” on the
(LED indicators light up to indicate which configuration function the system is
in.) A “short press” switches from one function to the next. And another “long
press” implements the current selection.

Configure button is used to initiate basic configuration.

F

"Long press" in this user’s guide means pressing the Configure button for
more than 2 seconds and then releasing it. "Short press" means pressing
the Configure button and immediately releasing it. Also, note that if this
button is not pressed within 10 seconds, the system will return to normal
operation.

Hardware Installation 3-5

SwitcHub-2s User’s Guide

Selections Available

This section shows the information available for each display mode and the
corresponding LED indicators. The display functions are listed here in the
sequence selected by the configure button. For a more detailed description of
these indicators, refer to Chapter 2.

Bandwidth Utilization

Active LED: Util% (ON)
In this mode, the statistical indicators show the percentage of valid data

handled by each port on the hub compared to available bandwidth.

Packet Forwarding Ratio

Active LED: Forward% (ON)
In this mode, the statistical indicators show the percentage of packets that must

be forwarded by bridging hardware to the other port on the switching hub.

Packet Filtering Ratio

Active LED: Filter% (ON)
In this mode, the statistical indicators show the percentage of packets that must

be filtered from the switching hub by bridging hardware because the destination
address is on the segment connected to the receiving port (i.e., in the same
segment with the source address).

Collision Ratio

Active LED: Coll% (ON)
In this mode, the statistical indicators show the percentage of packet collisions

occurring out of the total packets transmitted by the respective port.

3-6 Hardware Installation

SwitcHub-2s User’s Guide

Full/Half Duplex Mode Selection

Active LED: Full/Half (ON)
This function is used to set the communication mode for selected ports to full-

duplex or half-duplex.

1. Use the
that before the
selections will be displayed by the Port Status
mode has been previously set for a port, the corresponding
lit). After the

Configure button to light the Full/Half Display Mode indicator. Note

Configure button is released, the current communication mode

Full LEDs (i.e., if full-duplex

Full LED will be

Configure button is released, the Full LED for Port 1 will begin

to flash.

2. To change the current setting for a port, use a "short press" (i.e., light the

Full LED to select full-duplex communications, or extinguish the Full LED to

select half-duplex communications), and then use a long press to effect the
setting and move on to Port 2.

3. When finished, use a long press to terminate duplex mode selection.

Diagnostic Function

Active LED: Diag (ON)
Enabling the diagnostic function will activate tests similar to the one performed

upon power on. For details on the these tests, refer to

Diagnostics Tests earlier in

this chapter. After successfully completing diagnostics, the system returns to
normal operation.

Hardware Installation 3-7

SwitcHub-2s User’s Guide

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 2.)

•

Link Indicates that the port has established valid network connection.
Transmit Indicates outgoing traffic traversing the port.

•

Receive Indicates incoming traffic entering the port.

•

Full Indicates that communications have been set to full-duplex.

•

100 Indicates that communications have been set to 100Mbps.

•

If the Link status indicator is not functioning properly, or you experience any
other difficulties in setting up the hub, refer to Appendix A.

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 displays valid indications when connected to
the network.

• Check the length of the twisted-pair cable to be sure it does not exceed 100
meters.

3-8 Hardware Installation

SwitcHub-2s User’s Guide

• Verify that the workstation’s adapter card is functioning properly 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.

Hardware Installation 3-9

Appendix A: Troubleshooting

Diagnosing Hub Indicators

The SwitcHub-2s 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: Link indicator does not light up (green LED) after making a connection.
Cause: Workstation’s network adapter, cable or hub port is defective.
Solution: The most common cause for a bad connection to a workstation or

server is a defective network adapter or cable connection. Check the
workstation’s network adapter and cable connections for possible
defects. Replace the defective adapter or cable.

Symptom: Power indicator do e s n o t li ght up (green L E D ) after power on.
Cause: Defective power supply or CPU
Solution: Have your unit’s power supply or CPU replaced. Ask for dealer

assistance.

Use the diagnostic procedures described in Chapters 2 and 3 to verify that all
other system components are functioning properly. If any component fails the
diagnostic test, contact your Accton distributor for assistance.

A-1

SwitcHub-2s User’s Guide

System Diagnostics

Installation

Verify that all system components have been properly installed. If one or more
components appear to be malfunctioning, test them in an alternate environment
where you are sure that all the other components are functioning properly.

Transmission Mode

Be sure each port on the SwitcHub is set to the same transmission mode as the
attached device; i.e., full-duplex or half-duplex. (Refer to

tion Mode

Cabling

in Chapter 2 for a detailed description.)

1. Verify that the cabling type is correct. Be sure all cable connectors are
securely seated in the required ports. Straight-through cable should be used
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.

External Adapters

Setting the Communica-

Make sure the network adapter cards installed in the workstations are in good
working condition.

Configuration

If problems occur after altering the network configuration, restore the original
connections, and 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.

A-2 Troubleshooting

SwitcHub-2s System User’s Guide

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. If the problem still persists and you have
completed all the preceding diagnoses, then contact your Accton distributor for
further assistance. (Refer to Appendix E.)

Product Specifications A-3

Appendix B:

Port and Cable Assignments

RJ-45 Port

Figure B-1 RJ-45 Connector (on the Hub Side)

Pin

1 Input Receive Data + Output Transmit Data +
2 Input Receive Data - Output Transmit Data ­3 Output Transmit Data + Input Receive Data +
6 Output Transmit Data - Input Receive Data -

4,5,7,8 Not Used Not Used

MDI-X Assignment

Station Port 1 ~ 2

Table B-1 RJ-45 Pin Assignments

MDI Assignment

Cascade Port 1 ~ 2

Schematics for both straight and crossover twisted-pair cable are shown below.

Straight-Through Crossover

(Hub) (Adapter) (Hub) (Hub)

1 IRD+ 1 OTD+ 1 IRD+ 1 IRD+
2 IRD- 2 OTD- 2 IRD- 2 IRD­3 OTD+ 3 IRD+ 3 OTD+ 3 OTD+
6 OTD- 6 IRD- 6 OTD- 6 OTD-

B-1

Appendix C: Specifications

Product Specifications

Basic Criteria

Access Method
Standards Conformance IEEE 802.3 10BASE-T, IEEE 802.3u 100BASE-TX
Communication Mode Full-duplex or half-duplex
Media Supported 10BASE-T Category 3,4,5 twisted-pair cable

Number of Ports 2 RJ-45 ports (selectable 10BASE-T or 100BASE-TX per port)
Dimensions 273mm x 166mm x 42.9mm (10.75[ x 6.54[ x 1.69[)
Power Requirements Full range power input, 100 to 240V, 50/60 Hz, 27 watts max.
Temperature 0°C to 50°C (Standard Operating)
Humidity 5% to 95% (Noncondensing)
Certification CE Mark
Emissions FCC Class B, VCCI Class 2, CISPR Class B
Immunity IEC 801-2,3,4, EN60555-2 Class B, EN60555-3
Safety UL, CSA, TÜV/GS

Switching Criteria

Network Bridging Function
Maximum Filtering Rate at line speed
Maximum Forwarding Rate at line speed
Network Latency less than 20 microseconds
Address Table 4K entries/port
Queue Buffer 160K bytes/port

CSMA/CD, 10/100 Mbps (auto-sensed)

100BASE-TX Category 5 twisted-pair cable

filtering, forwarding and learning

C-1

EMI Warning

Appendix D: Regulatory

Standards Compliance

FCC Class B Certification

Accton Technology Corporation
Model Numbers: EH3001-TX
FCC ID: HED3001EHLCT-TX

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 has been tested and found to comply with the limits
for a Class B 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 or more of the following measures:

• 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

You are cautioned that changes or modifications not expressly
approved by the party responsible for compliance could void your
authority to operate the equipment.

D-1

SwitcHub-2s User’s Guide

Warnings

Note:

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.

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:

• Twisted-pair for RJ-45 connections: 10BASE-T or 100BASE-TX

You may use unshielded twisted-pair (UTP) for RJ-45 connections.

D-2 Regulatory Standards Compliance

SwitcHub-2s User’s Guide

Voluntary Control Council for Interference (VCCI-2)

This product also com pl ie s with CISPR22 Class B (EN55022 Clas s 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).

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) class B

EN60555-2(1987) class A
EN60555-3
prEN55024-2(1990)/IEC801-2(1991) 4kV CD, 8kV AD
prEN55024-3(1991)/IEC801-3(1984) 3V/m
prEN55024-4(1992)/IEC801-4(1988) 1kV - (power line)

0.5kV - (signal line)

prEN50082-1(1994)/IEC801-6 3Vrms

This product complies with the requirements of the Low Voltage
Directive 73/23/EEC and the EMC Directive 89/336/EEC.

Do not plug a phone jack connector into any of the RJ-45 ports.
This may damage the hub.

Les raccordeurs ne sont pas utilisé pour le système téléphonique!

Regulatory Standards Compliance D-3

SwitcHub-2s User’s Guide

Safety Compliance

Underwriters Laboratories Compliance Statement

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 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

240 Volts (For North America) 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

240 Volts (For Europe only) C o rd Set with H 0 5 V V - F c o r d h a v in g three conductors with minimum diameter of 0.75 mm

IEC-320 receptacle
Male plug rated 6A, 250V

The unit automatically matches the 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.

2

D-4 Regulatory Standards Compliance

SwitcHub-2s User’s Guide

Sicherheitshinweise

1. Die Steckdose muß sich in der Nähe des Gerätes befinden und leicht
zugänglich sein.

2. Zum Reinigen den Stecker aus der Steckdose ziehen. Beim Reinigen
keine Flüssigreiniger oder Sprays verwenden, sondern ein
angefeuchtetes Tuch.

3. Das produkt gerät nicht in Naßräume oder in der Nähe von Wasser
benutzen, wie z.B. Badezimmer, Schwimmbad, Spülbecken usw. . Das
Eindringen von Wasser kann zur Zerstörung des Gerätes führen.

4. Das produkt gerät nicht auf einer unstabilen Unterlage, wie z.B.
Rollwagen, Gestell usw., aufstellen. Es könnte herunterfallen und
Verletzungen oder Beschädigungen von Mensch und Gerät
verursachen.

5. Die Belüftungsöffnungen nicht blockieren oder auf falscher Ober­fläche, wie Bett, Sofa usw., stellen. Durch die Blockierung kann es zur
Zerstörung des Gerätes durch Überhitzung kommen.

6. Versuchen Sie niemals dieses Gerät selbst zu warten, da beim Öffnen
oder Abnehmen des Gehäuses die Gefahr eines elektrischen Schlages
besteht.

7. Keine Gegenstände auf das Anschlußkabel stellen, damit es nicht
durch scharfe Kanten zerstört werden kann.

8. Keinerlei Gegenstände durch die Öffungen in das Gerät stecken, da es
dadurch sonst zu Kurzschlässen kommen kann.

9. Bei Störungen des Gerätes den Wartungsdienst verständigen.

10. Bei Reperaturen dürfen nur Orginalersatzteile oder Bauteile mit
gleichen Eigenschaften verwendet werden. Andere Bauteile können
Feuer, elektrischen Schlag oder andere Gefahren verursachen.

11. Nach Beendigung von Wartungsarbeiten oder Reperaturen durch den
Kundendienst sollte die Sicherheitsprüfung durchgeführt werden.

12. Bei längerem Stillstand des Gerätes, ist diese von der Versorgungs­spannung zu trennen. Dies verhindert eine Beschädigung des Gerätes
durch eine Überspannung in der Zuleitung.

13. Der arbeitsplatzbezogene Lärmschutzpegel nach DIN 45 635 ist
kleiner 70dB (A).

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.

E-1

SwitcHub-2s 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.

Software Update and Upgrade Service

Accton constantly improves its software units by adding enhancements and new
features. Minor software updates are free of charge. If greater changes have been made
to the software, Accton offers software upgrade services at a specially reduced price.

Bulletin Board Service (BBS)

• In countries other than the U.S., call 886-35-770-654 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

SwitcHub-2s 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: 886-35-770-267
USA Headquarters: 408-452-8988

• To obtain software upgrades connect via ftp to ftp.accton.com.tw

• Send your technical questions by email to [e-mail]

• 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.

International Headquarters

(Monday through Friday,
8 am to 6 p.m.):
886-35-770-270

Product Support Services E-3

USA Headquarters

Accton Technology
Corporation
Attn: Technical Support
1962 Zanker Road,
San Jose, CA 95112, U.S.A.

During local business hours, call:

USA Headquarters

(Monday through Friday,
7 am to 5 p.m. Pacific Time):
408-452-8900 or 800-926-9288

SwitcHub-2s 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

SwitcHub-2s 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: [phone] Fax: [phone] BBS: 886-35-770-654

North and South America:

Accton Technology Corporation, USA Headquarters
1962 Zanker Road, San Jose, CA 95112, U.S.A.
Phone: [phone] Fax: [phone] BBS: 408-452-8828

Product Support Services E-5

SwitcHub-2s User’s Guide

Accton Distributors

Accton Technology Corporation

International Headquarters,
No. 1 Creation Rd. III,
Science-based Industrial Park,
Hsinchu 300, Taiwan, R.O.C.
Hsinchu: Phone: [phone],
Fax: [phone]
BBS: 886-35-770-654
Taipei: Phone: [phone] to 9
Fax: [phone]

Accton USA,
1962 Zanker Road,
San Jose, CA 95112, USA
Phone: [phone]
Fax: [phone]
BBS: 408-452-8828
FAST FAX: [phone]

Accton UK,
The Mill Horton Road,
Stanwell Moor,
Staines. Middx. TW19 6BJ United Kingdom
Phone: [phone]
Fax: [phone]

Ordering Information

Accton Australia,
Unit 23, No.27 Doomben Ave.,
Eastwood, N.S.W. 2122, Australia
Phone: [phone]
Fax: [phone]

Accton Deutschland,
Bahnhofstr. 6,
65623 Hahnstatten, Germany
Phone: [phone]
Fax: [phone]

Accton Japan,
Kano Bldg. 7F,
1-25-1 Nishi-Gotanda,
Shinagawa-ku,
141 Tokyo, Japan
Phone: [phone]
Fax: [phone]

• SwitcHub-2s (EH3001-TX) 2-port Fast Ethernet Switch

E-6 Product Support Services

Glossary

10BASE-T

IEEE’s specifications for 10 Mbps Ethernet using twisted-pair cable (100W STP or
UTP). The maximum length of cable for a point-to-point connection is 100 meters.

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.

Bus Topology

A network topological arrangement where only one path exists between any two nodes
and data transmitted by any node is concurrently available to all other nodes on the same
transmission medium.

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

MDI port on the SwitcHub-2s. Port 1 or 2 can be used to connect the fast Ethernet
switch to other compatible hubs in a daisy-chain configuration.

1

SwitcHub-2s User’s Guide

Ethernet

A network communication system developed and standardized by DEC, Intel, and
Xerox, using baseband transmission, CSMA/CD access, 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, broadband, and twisted-pair.

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 SwitcHub 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.

RJ-45 Connector

Most common terminator for twisted-pair wiring.

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.

Station Port

SwitcHub-2s MDI-X ports which are used for connecting the hub to any workstation or
server that has a properly installed network adapter card.

2 Glossary

SwitcHub-2s User’s Guide

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

Accton's Ethernet Switch (SwitcHub-2se) •

1-2

C

Configure Button • 2-2

Long Press • 3-5

Short Press • 3-5
Connecting the Hub System • 3-2
Connection

Verifying • 3-8
Cord Set Specifications • D-4
Crossover Cable • B-1
Cut-through Switching • 1-2

D

Daisy-chain Connection • 3-3
Diagnostic Tests • 3-4
Display Mode • 3-5

E

EMI Warning • D-1
Ethernet Ports • 2-10

F

FCC Warning • D-1
Forward Packets • 1-1
Front Panel • 2-1
Full/Half Duplex Mode Selection • 3-7

H

Hardware Description • 2-1

I

Installation Requirements • 3-1

L

LED Indicators

100 • 2-9
Coll% • 2-5
Diag • 2-7
Filter% • 2-5
Forward% • 2-5
Full • 2-9
Full/Half • 2-6
Link • 2-8
Power • 2-3
RX • 2-9
Statistical Display • 2-4
TX • 2-9

Util% • 2-4
Limited Warranty • E-4
Link indicator • 3-8

M

Maximum Cable Length

Twisted-pair • 3-8

1

SwitcHub-2s User’s Guide

P

Package Contents • iii
Port and Cable Assignments • B-1
Port Diagnostic Test • 2-8
Port Status • 3-8
Port Status Indicators • 2-8
Power Socket • 2-10
Product Features • 1-4
Product Specifications • C-1
Product Support Services • E-1

Accton Distributors • E-6
Bulletin Board Service • E-2
Hardware Repair Service • E-1
Interactive Fast Fax • E-2
Ordering Information • E-6
Software Update and Upgrade Service • E-2
Technical Support • E-3

Providing Power to the SwitcHub • 3-4

Q

Quick Installation • v

R

Rear Panel • 2-10

System Diagnostic Test • 2-7

T

Troubleshooting • 2-8, A-1

Configuration • A-2

Hub Indicators • A-1

Installation • A-2

V

Verifying System Operation • 3-8

S

Safety Compliance • D-4
Server/Workstation Connection • 3-2
Setup and Configuration • 3-1
SmartWatch LED Panel • 2-3
Standards Compliance • D-1
Switching Technology • 1-1

2 Index

EH3001-TX
E0496-R03
150652-101