Allied Telesis AT-GS903SX User manual

AT-GS903SX
Gigabit Switch
Installation Guide
PN 613-10842-00 Rev C

Copyright 2000 Allied Telesyn International, Corp.
960 Stewart Drive Suite B, Sunnyvale CA 94086 USA
All rights reserved. No part of this publication may be reproduced without prior written permission
from Allied Telesyn International, Corp.
Ethernet is a registered trademark of Xerox Corporation. All other product names, company names,
logos or other designations mentioned herein are trademarks or registered trademarks of their
respective owners.
Allied Telesyn International Corp. reserves the right to make changes in specifications and other
information contained in this document without prior written notice. The information provided
herein is subject to change without notice. In no event shall Allied Telesyn be liable for any incidental,
special, indirect, or consequential damages whatsoever, including but not limited to lost profits,
arising out of or related to this manual or the information contained herein, even if Allied Telesyn
International Corp. has been advised of, known, or should have known, the possibility of such
damages.

iii
Electrical Safety and Emission Compliance
Statement
Standards: This product meets the following standards.
RFI Emission EN55022 Class A !1
WARNING: In a domestic environment this product may cause radio
interference in which case the user may be required to take adequate
measures. !2
Immunity EN50082-1 !3
Electrical Safety EN60950, UL 1950, CSA 950 !4
U.S. Federal Communications Commission
RADIATED ENERGY
Note: This equipment has been tested and found to comply with the limits
for a Class A digital device pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with this instruction manual,
may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in
which case the user will be required to correct the interference at his own
expense.
Note: Modifications or changes not expressly approved by the manufacturer
or the FCC can void your right to operate this equipment.
Canadian Department of Communications
This Class A digital apparatus meets all requirements of the Canadian
Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du
Règlement sur le matériel brouilleur du Canada.

Electrical Safety and Emission Compliance Statement
iv
Important: Appendix A contains translated safety statements for installing
this equipment. When you see the !, go to Appendix A for the translated
safety statement in your language.
Wichtig: Anhang A enthält übersetzte Sicherheitshinweise für die Installation
dieses Geräts. Wenn Sie !sehen, schlagen Sie in Anhang A den übersetzten
Sicherheitshinweis in Ihrer Sprache nach.
Vigtigt: Tillæg A indeholder oversatte sikkerhedsadvarsler, der vedrører
installation af dette udstyr. Når De ser symbolet !, skal De slå op i tillæg A
og finde de oversatte sikkerhedsadvarsler i Deres eget sprog.
Belangrijk: Appendix A bevat vertaalde veiligheidsopmerkingen voor het
installeren van deze apparatuur. Wanneer u de!ziet, raadpleeg Appendix A
voor vertaalde veiligheidsinstructies in uw taal.
Important: L'annexe A contient les instructions de sécurité relatives à
l'installation de cet équipement. Lorsque vous voyez le symbole !, reportez-
vous à l'annexe A pour consulter la traduction de ces instructions dans votre
langue.
Tärkeää: Liite A sisältää tämän laitteen asentamiseen liittyvät käännetyt
turvaohjeet. Kun näet !-symbolin, katso käännettyä turvaohjetta liitteest
A.
Importante: l’Appendice A contiene avvisi di sicurezza tradotti per
l’installazione di questa apparecchiatura. Il simbolo !, indica di consultare
l’Appendice A per l’avviso di sicurezza nella propria lingua.
Viktig: Tillegg A inneholder oversatt sikkerhetsinformasjon for installering
av dette utstyret. Når du ser !, åpner du til Tillegg A for å finne den oversatte
sikkerhetsinformasjonen på ønsket språk.
Importante: O Anexo A contém advertências de segurança traduzidas para
instalar este equipamento. Quando vir o símbolo !, leia a advertência de
segurança traduzida no seu idioma no Anexo A.
Importante: El Apéndice A contiene mensajes de seguridad traducidos para
la instalación de este equipo. Cuando vea el símbolo !, vaya al Apéndice A
para ver el mensaje de seguridad traducido a su idioma.
Obs! Bilaga A innehåller översatta säkerhetsmeddelanden avseende
installationen av denna utrustning. När du ser !, skall du gå till Bilaga A för
att läsa det översatta säkerhetsmeddelandet på ditt språk.

v
Table of Contents
Electrical Safety and Emission Compliance Statement ......................iii
Welcome to Allied Telesyn ......................................................................... vii
Where to Find Web-based Guides ...................................................................vii
Documentation Conventions............................................................................ vii
Contacting Allied Teleysn...............................................................................viii
For Technical Support and Services........................................................viii
Technical Support E-mail Addresses ......................................................viii
FTP Server.................................................................................................. ix
For Sales or Corporate Information ................................................................. ix
Tell Us What You Think ................................................................................... ix
Chapter 1
Product Description ...................................................................................... 1
Features .............................................................................................................. 1
Physical Description........................................................................................... 2
LEDs ............................................................................................................ 3
MDI Button.................................................................................................. 4
Media Type .................................................................................................. 4
AC Power Connector ................................................................................... 5
Where to Go Next ............................................................................................... 5
Chapter 2
Installation ...................................................................................................... 7
Verifying Switch Package Contents .................................................................. 7
Preparing the Site .............................................................................................. 7
Installing the Switch on a Desktop ................................................................... 8
Installing the Switch on a Wall ......................................................................... 9
Installing the Switch in a Rack Mount ........................................................... 10
Warranty Registration..................................................................................... 11
Chapter 3
Troubleshooting ........................................................................................... 13
How the Switch Reports Problems .................................................................. 13
Network Cabling Problems.............................................................................. 13
Common Problems............................................................................................ 13
Link /Activity LED on Any Port is OFF................................................... 14
Power LED is OFF .................................................................................... 14
Calling Technical Support................................................................................ 15

vi
Appendix A
Translated Safety and Emission Information .......................................17
Appendix B
Technical Specifications ............................................................................ 29
Physical Specifications..................................................................................... 29
Environmental Specifications.......................................................................... 29
Power Specifications......................................................................................... 29
Agency Compliance........................................................................................... 29
Appendix C
Technical Support Fax Order ................................................................... 31
Incident Summary............................................................................................ 31
Appendix D
AT-GS903SX Installation Guide Feedback .............................................33

vii
The guide provides the required information to install and configure the
AT-GS903SX Gigabit Ethernet Switch.
Where to Find Web-based Guides
Allied Telesyn wants our customers to be well informed by providing the most
up-to-date and most easily accessible way to find our guides and other
technical information.
Visitourwebsite at www.alliedtelesyn.com/support/lib_allproducts.htm
for related product information.
Documentation Conventions
Through out this guide, you will notice several conventions that you should
become familiar with first before installing the product.
Note
A note provides additional information.
Caution
A caution indicates that performing or omitting a specific action may
result in equipment damage or loss of data.
Warning
A warning indicates that performing or omitting a specific action
may result in bodily injury.
Welcome to Allied Telesyn

Welcome toAlliedTelesyn
viii
Contacting Allied Teleysn
There are several ways to contact Allied Telesyn technical support, online,
telephone, fax or by e-mail.
Online Support
You can request technical support online by filling out the Tech-Assistant
Form at www.alliedtelesyn.com/forms/feedtech.htm.
Telephone and Fax Support
E-mail Support
United States and Canada
[e-mail]
Latin America, Mexico, Puerto Rico, the Caribbean, and Virgin Islands
[e-mail]
United Kingdom, Sweden, Norway, Denmark, and Finland
[e-mail]
Americas
United States, Canada, Mexico,
Central America, South America
Tel: [phone], select option 4
Fax: [phone]
Germany
Germany, Switzerland, Austria, Eastern
Europe
Tel: [phone]
Fax: [phone]
Asia
Singapore, Taiwan, Thailand, Malaysia,
Indonesia, Korea, Philippines, China,
India, Hong Kong
Tel: [phone]
Fax: [phone]
Italy
Italy, Spain, Portugal, Greece, Turkey,
Israel
Tel: [phone]
Fax: [phone]
Australia
Tel: [phone]
Fax: [phone]
Japan
Tel: [phone]
Fax: [phone]
France
France, Belgium, Luxembourg,
The Netherlands, Middle East, Africa
Tel: [phone]
Fax: [phone]
United Kingdom
United Kingdom, Denmark, Norway,
Sweden, Finland
Tel: [phone]
Fax: [phone]

AT-GS903SX Installation Guide
ix
Returning Products
Products for return or repair must first be assigned a Return Materials
Authorization (RMA) number. A product sent to Allied Telesyn without a RMA
number will be returned to the sender at the sender’s expense.
To obtain an RMA number contact Allied Telesyn’s Technical Support at one of
the following location:
FTP Server
If you know the name of a specific driver, you may connect directly to our FTP
server at: ftp://gateway.centre.com.
At login, enter ‘anonymous’. Enter your e-mail address for the password as
requested by the server at login.
North America
Tel: [phone], select option 4
Fax: [phone]
European Customer Support Centre
10/11 Bridgemead Close
Westmead Industrial Estate
Swindon, Wiltshire SN5 7YT
England
Tel: [phone]
Fax: [phone]
Latin America, the Caribbean,
Virgin Islands
Tel: international code + 425-481-3852
Fax: international code + 425-483-9458
Mexico and Puerto Rico
Tel: [phone], ext 3852 or
1-800-424-4284, ext 3852
Mexico only:95-800-424-5012, ext 3852
Fax: international code + 425-489-9191

Welcome toAlliedTelesyn
x
For Sales or Corporate Information
Tell Us What You Think
In our continuing efforts to help you get the most from Allied Telesyn, we look
for new and better ways to document our products. If you have comments or
suggestions on how we might improve this or other documents, please fill out
the “AT-GS903SX Installation Guide Feedback” on page 33 and return the
form to us at the address or fax number provided, or you can provide feedback
online by filling out the Feedback on Documentation form at
www.alliedtelesyn.com/forms/feedmanu.htm.
Allied Telesyn International, Corp.
19800 North Creek Parkway, Suite 200
Bothell, WA 98011
Tel: [phone]
Fax: [phone]
Allied Telesyn International, Corp.
960 Stewart Drive, Suite B
Sunnyvale, CA 94086
Tel: [phone] (USA and Canada)
Fax: [phone]

1
Chapter 1
Product Description
This chapter describes the features of the AT-GS903SX Gigabit Ethernet
Switch.
Features
The AT-GS903SX is an unmanaged, Gigabit Ethernet Switch that provides
familiar Ethernet technology with high-speed access. It is a high-performance
switch that can be installed on the desktop, mounted on a wall, or installed in
a 19-inch rack. It presents an affordable, ideal solution to the bottlenecks that
can occur in networks where data-intensive applications and a proliferation of
newusers is disrupting networkthroughput. Theswitch provides thefollowing
features:
❑Ethernet, Fast Ethernet, and Gigabit Ethernet connectivity:
one 10/100Base-TX port with an RJ-45 connector, and three
1000Base-SX ports with SC connectors
❑A small 1.0U high, 13-inch enclosure for desktop, wall, or 19-inch
rack-mount installation
❑Half- or full-duplex operation and autonegotiation on the 10/100Mbps
port, full-duplex operation on the gigabit ports
❑Complies with IEEE 802.3u, IEEE 802.3ab, and IEEE 802.3z
specifications
❑Store-and-forward switching mode
❑Supports extended frame lengths up to 1536 bytes
❑12K MAC addresses with automatic learning and aging
❑Eight MB SGRAM for the data buffer of each port
❑LED indicators for Power, for port Link and Activity on the gigabit
ports, and for Full-duplex/Collision and Link/Activity on the
10/100Mbps port
❑One media-dependent interface (MDI) button on Port 4 (10/100Mbps)
for hub or PC connection
❑Internal autoranging power supply (100-120/200-240VAC)

Product Description
2
Physical Description
Figure 1 shows the front panel of the switch.
Figure 1 The AT-GS903SX Switch (Front)
Figure 2 shows the rear view of the switch showing the AC input and fan
locations.
Figure 2 Rear View of AT-GS903SX Switch
Figure 3 shows the labels for the LEDs indicators for the two types of ports.
Figure 3 LED Indicators Labels (Partial Front Panel)

AT-GS903SX Installation Guide
3
LEDs
Table 1describes the switch LEDs. Refer to Figure 3 for the labels for the LEDs
for the two types of ports.
Table 1 AT-GS903SX LED Indicators
LED Color Indicates
Power Green On The switch is powered up and ready for use.
Off The switch is powered off.
Gigabit Ethernet Port Status LEDs
Link Green On Link is present; port isenabled; full-duplex operation.
Off Linkis not present.
Activity Green Flashing Packetsare being transmitted/received on this port.
Off No activity on this port.
10/100Mbps Port Status LEDs
Ful/Col Yellow On Full-duplex mode.
Off Half-duplex mode.
Yellow Flashing Two or more devices attempted to transmit data at the same
time. (Typical under Ethernet CSMA/CD.)
Link/ Yellow On 100M Link is present; port is enabled.
Act Yellow Flashing 100M Packets are being transmitted/received on this port.
Green On 10M Link is present; port is enabled.
Green Flashing 100M Packets are being transmitted/received on this port.
Off Linkis not present.

Product Description
4
MDI Button
The MDI provides you with the flexibility for using a straight-through cable to
connect to a hub or another switch, or to any DTE such as an end station or a
server. The button is associated with Port 4. Table 2 describes the MDI button
positions.
Media Type
Table 3 describes the standard (connectors), media, and maximum distances
for each port type.
Table 2 MDI Positions
Position Label Use
X
To PC To connect a DTE to the port
=
To Hub To connect a hub or another switch to the port
Table 3 Media Types and Distances
Standard Media Type MHz/Km
Rating Maximum Distance
1000Base-SX (Short
Wave = 850 nm) 50/125um Multimode Fiber Single-mode: not supported 500 550 m (1804 ft)
62.5/125um Multimode Fiber
Single-mode: not supported 160 220 m (722 ft)
100Base-TX Category 5 UTP Cable (100 Mbps) 100 m (328 ft)
10Base-T Category 3 UTP Cable (10 Mbps) 100 m (328 ft)
Out
In

AT-GS903SX Installation Guide
5
AC Power Connector
The switch has a single AC power supply socket in the rear panel, which has
autoranging AC voltage inputs. The input voltage range is from
100-120/200-240 VAC, 50/60 Hz. The power cord acts as an ON/OFF switch.
Where to Go Next
Proceed to Chapter 2 for details on how to install the switch.

7
Chapter 2
Installation
This chapter describes how to install the AT-GS903SX on adesktop, on a wall,
or into a 19-inch rack.
Verifying Switch Package Contents
Make sure the following items are included in your switch package. If any of
the following items are missing or damaged, contact your sales representative.
❑One AT-GS903SX switch
❑This Installation Guide
❑Warranty card
❑Four rubber feet for desktop installation
❑Two brackets, eight flathead Phillips screws, and four large screws
and nylon washers for installation into a 19-inch rack
❑Two screws and plastic anchors for horizontal wall installation
❑Three spare self-adhesive serial number labels
❑Power cord (Americas, EC, Australia, and UK only)
Preparing the Site
Use common sense when selecting a location for the switch and observe the
following:
❑Make sure that the switch’s power is accessible and cables can be
connected easily.
❑Cabling must be away from sources of electrical noise such as radios,
transmitters, broadband amplifiers, power lines, electric motors, and
fluorescent fixtures.
❑Air flow around the switch and through its vents on the side and rear
must not be restricted.

Installation
8
❑If you are installing the switch on a desk, make sure it is placed on a
level, secure desktop.
❑Do not place objects on top of the switch.
❑Do not expose the switch to moisture or water.
❑Make sure it is in a dust-free environment.
❑Use dedicated power circuits or power conditioners to supply reliable
electrical power to the network devices.
Note
To install the switch vertically on a wall, use the AT-BRKT18 Wall-
Mount Bracket; order it from your Allied Telesyn representative.
Installing the Switch on a Desktop
1. Locate a level, secure surface for the switch.
2. Apply the four rubber feet to the bottom of the unit.
3. Put the switch onto the rubber feet on the desktop.
Warning
The power cord is used as a disconnection device. To de-energize
equipment, disconnect the power cord. !8
4. Apply power to the switch by plugging the power cord into the rear of
the unit and plugging the other end into a wall outlet. Verify that the
Power LED lights green.
If the Power LED does not light green, refer to Chapter 3, for further
information.
5. Connect the data cables and observe normal operation as indicated by
the port LEDs. Refer to Table 1 on page 3 for LED information. For
Port 4, set the MDI Button to the correct setting. Refer to Table 2 on
page 4 for the MDI setting.

AT-GS903SX Installation Guide
9
Installing the Switch on a Wall
The switch can be installed vertically or horizontally on the wall.
Warning
To install the switch verticallyon a wall, you must use the accessory
AT-BRKT18 Wall-Mount Bracket. DO NOT USE the keyholes in the
bottom of the switch chassis to mount it vertically on the wall.
These instructions are for mounting the switch horizontally on the wall. To
mount the switch vertically on a wall, follow the instructions supplied withthe
AT-BRKT18 Wall-Mount Bracket. Order the bracket from your Allied Telesyn
representative.
1. Select a wall location for the switch.
2. Install two plastic anchors and two pan-head screws into the wall,
separated by 100 mm (approximately 4-inches) on center.
3. Position the switch onto the wall screws.
Warning
The power cord is used as a disconnection device. To de-energize
equipment, disconnect the power cord. !8
4. Apply power to the switch by plugging the power cord into the rear of
the unit and plugging the other end into a wall outlet. Verify that the
Power LED lights green.
If the Power LED does not light green, refer to Chapter 3,
Troubleshooting, for further information.
5. Connect the data cables and observe normal operation as indicated by
the port LEDs. Refer to Table 1 on page 3 for LED information. For
Port 4, set the MDI Button to the correct setting. Refer to Table 2 on
page 4 for the MDI setting.

Installation
10
Installing the Switch in a Rack Mount
Caution
Do not use power tools to perform this installation.
1. Remove all cables and the power cord from the switch (if previously
attached).
Caution
Air vents must not be blocked and must have free access to the room
ambient air for cooling. !11
2. Attach the rackmounting brackets to each side of the switch as shown
in Figure 4, using the eight flathead screws that came in the switch
package.
Figure 4 Attaching Rackmounting Brackets
3. Mount the switch into the rack using four large pan-head screws and
nylon washers (provided).
4. Ensure that there is unrestricted air flow around the switch.
Warning
The power cord is used as a disconnection device. To de-energize
equipment, disconnect the power cord. !8
5. Apply power to the switch by plugging the power cord into the rear of
the unit and plugging the other end into a power outlet.
If the Power LED does not light green, refer to Chapter 3,
Troubleshooting, for further information.
Bracket
Bracket