Allied Telesis AT-GS908 User Manual
Gigabit
Ethernet
Switch
AT-GS908
®
Installation
Guide
PN 613-50472-00 Rev A
Copyright 2003 Allied Telesyn, Inc.
960 Stewart Drive Suite B, Sunnyvale, CA 94085 USA
All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesyn, Inc.
All other product names, company names, logos or other designations mentioned herein are trademarks or registered trademarks
of their respective owners.
Allied Telesyn, Inc. 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, Inc. 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, Inc. has been advised of, known, or
should have known, the possibility of such damages.
Electrical Safety and Emission
Statement
Standards: This product meets the following standards.
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.
RFI Emission FCC Class A, EN55022 Class A, VCCI Class A, C-TICK, EN61000-3-2,
Warning: In a domestic environment this product may cause radio interference in which case the user may be required to take
adequate measures.
Immunity EN55024
Electrical Safety UL 1950 (UL/cUL)), EN60950 (TUV)
Important: Appendix B contains translated safety statements for installing this equipment. When you see the
B for the translated safety statement in your language.
Wichtig: Anhang B enthält übersetzte Sicherheitshinweise für die Installation dieses Geräts. Wenn Sie
Anhang B den übersetzten Sicherheitshinweis in Ihrer Sprache nach.
Vigtigt: Tillæg B indeholder oversatte sikkerhedsadvarsler, der vedrører installation af dette udstyr. Når De ser symbolet
De slå op i tillæg B og finde de oversatte sikkerhedsadvarsler i Deres eget sprog.
Belangrijk: Appendix B bevat vertaalde veiligheidsopmerkingen voor het installeren van deze apparatuur. Wanneer u de
raadpleeg Appendix B voor vertaalde veiligheidsinstructies in uw taal.
Important: L'annexe B contient les instructions de sécurité relatives à l'installation de cet équipement. Lorsque vous voyez le
symbole
Tärkeää: Liite B sisältää tämän laitteen asentamiseen liittyvät käännetyt turvaohjeet. Kun näet
turvaohjetta liitteestä B.
Importante: l’Appendice B contiene avvisi di sicurezza tradotti per l’installazione di questa apparecchiatura. Il simbolo
di consultare l’Appendice B per l’avviso di sicurezza nella propria lingua.
Viktig: Tillegg B inneholder oversatt sikkerhetsinformasjon for installering av dette utstyret. Når du ser
for å finne den oversatte sikkerhetsinformasjonen på ønsket språk.
Importante: O Anexo B contém advertências de segurança traduzidas para instalar este equipamento. Quando vir o símbolo
leia a advertência de segurança traduzida no seu idioma no Anexo B.
Importante: El Apéndice B contiene mensajes de seguridad traducidos para la instalación de este equipo. Cuando vea el símbolo
, reportez-vous à l'annexe B pour consulter la traduction de ces instructions dans votre langue.
2
EN61000-3-3
1
3
4
, go to Appendix
sehen, schlagen Sie in
, skal
ziet,
-symbolin, katso käännettyä
, indica
, åpner du til Tillegg B
,
, vaya al Apéndice B para ver el mensaje de seguridad traducido a su idioma.
Obs! Bilaga B innehåller översatta säkerhetsmeddelanden avseende installationen av denna utrustning. När du ser
till Bilaga B för att läsa det översatta säkerhetsmeddelandet på ditt språk.
, skall du gå
iii
Table of Contents
Preface .................................................................................................................................................................................................................... vii
How This Guide is Organized ........................................................................................................................................................................... vii
Document Conventions ...................................................................................................................................................................................viii
Where to Find Current Product Documentation ....................................................................................................................................... ix
Contacting Allied Telesyn ................................................................................................................................................................................... x
Online Support ............................................................................................................................................................................................... x
Email and Telephone Support .................................................................................................................................................................. x
Returning Products ....................................................................................................................................................................................... x
For Sales or Corporate Information ........................................................................................................................................................ x
Management Software Updates .............................................................................................................................................................. x
Chapter 1
Product Description ........................................................................................................................................................................................... 1
Features .....................................................................................................................................................................................................................2
Components ............................................................................................................................................................................................................ 3
Hardware Feature Description .......................................................................................................................................................................... 4
Twisted Pair Ports ..........................................................................................................................................................................................4
LEDs .................................................................................................................................................................................................................... 5
AC Power Connector .................................................................................................................................................................................... 6
A Few Ethernet Switching Basics ...................................................................................................................................................................... 7
MAC Address Table ....................................................................................................................................................................................... 7
Duplex Mode ................................................................................................................................................................................................... 8
Store and Forward ........................................................................................................................................................................................ 8
Backpressure and Flow Control ............................................................................................................................................................... 9
Network Topologies ............................................................................................................................................................................................10
Power Workgroup Topology ...................................................................................................................................................................10
Collapsed Backbone ...................................................................................................................................................................................11
Chapter 2
Installation ............................................................................................................................................................................................................13
Reviewing Safety Precautions .........................................................................................................................................................................14
Selecting a Site for the Switch .........................................................................................................................................................................15
Planning the Installation ...................................................................................................................................................................................16
Unpacking the Switch ........................................................................................................................................................................................17
Installing the Swtich on a Desktop ................................................................................................................................................................18
Installing the Switch in a Rack .........................................................................................................................................................................20
Warranty Registration .........................................................................................................................................................................................21
v
Table of Contents
Chapter 3
Troubleshooting ................................................................................................................................................................................................ 23
Appendix A
Technical Specifications ................................................................................................................................................................................ 25
Physical Specifications ....................................................................................................................................................................................... 25
Environmental Specifications ......................................................................................................................................................................... 26
Power Specifications .......................................................................................................................................................................................... 27
Safety and Electromagnetic Emissions Certifications ............................................................................................................................ 28
Connectors ............................................................................................................................................................................................................. 29
RJ-45 Twisted Pair Port Pinouts ............................................................................................................................................................. 29
Appendix B
Translated Electrical Safety and Emission Information ................................................................................................................. 31
vi
Preface
This guide contains the hardware installation instructions for the
AT-GS908 Gigabit Ethernet Switch.
How This Guide is Organized
This manual contains the following chapters and appendices:
Chapter 1, Product Description, describes the features and
components of the switches.
Chapter 2, Installation, contains the installation instructions for the
switches.
Chapter 3, Troubleshooting, provides information on how to resolve
problems that might occur with the switches.
Appendix A, Technical Specifications, contains the technical
specifications for the switches.
Appendix B, Translated Electrical Safety and Emission Information,
contains translations of the warnings and cautions in the manual.
vii
Preface
Document Conventions
This document uses the following conventions to highlight important
information:
Note
Notes provide additional information.
Warning
Warnings inform you that performing or omitting a specific action
may result in bodily injury.
Caution
Cautions inform you that performing or omitting a specific action
may result in equipment damage or loss of data.
viii
AT-GS908 Gigabit Ethernet Switch Installation Guide
Where to Find Current Product Documentation
The installation and user guides for all Allied Telesyn products are
available in Portable Document Format (PDF) from the Allied Telesyn
web site at www.alliedtelesyn.com. You can view the documents online
or download them onto a local workstation or server.
ix
Preface
Contacting Allied Telesyn
This section provides Allied Telesyn contact information for technical
support as well as sales or corporate information.
Online Support You can request technical support online by accessing the Allied Telesyn
Knowledge Base from the following web site:
http://kb.alliedtelesyn.com. You can use the Knowledge Base to submit
questions to our technical support staff and review answers to
previously asked questions.
Email and
Telephone
Support
Returning
Products
For Sales or
Corporate
Information
Management
Software
Updates
For Technical Support via email or telephone, refer to the Support &
Services section of the Allied Telesyn web site:
http://www.alliedtelesyn.com.
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 a RMA number, contact Allied Telesyn’s Technical Support at
our web site: http://www.alliedtelesyn.com.
You can contact Allied Telesyn for sales or corporate information at our
web site: http://www.alliedtelesyn.com. To find the contact information
for your country, select Contact Us -> Worldwide Contacts.
New releases of management software for our managed products can
be downloaded from one of the following web sites:
❑ the Allied Telesyn web site: http://www.alliedtelesyn.com
❑ the Allied Telesyn FTP server: http://ftp.alliedtelesyn.com
To use the FTP server, enter ‘anonymous’ for the user name and your
email address for the password.
x
Chapter 1
Product Description
The AT-GS908 switch is an unmanaged, Layer 2 Gigabit Ethernet switch
designed to simplify the task of creating or expanding an Ethernet, Fast
Ethernet, or Gigabit Ethernet network.
This chapter contains the follows sections:
Features on page 2
Components on page 3
Hardware Feature Description on page 4
A Few Ethernet Switching Basics on page 7
Network Topologies on page 10
1
Product Description
Features
AT-GS908 Gigabit Ethernet switch features include:
8 10/100/1000 Mbps twisted pair ports
System and port LEDs
Auto-negotiation (IEEE 802.3u-compliant)
Backpressure and flow control (IEEE 802.3x-compliant)
Store and forward packet handling
MAC address table capable of storing up to 8000 entries with
automatic aging
2
Components
AT-GS908 Gigabit Ethernet Switch Installation Guide
Figure 1 illustrates the front and back panels of the AT-GS908 switch.
10/100/1000Base Twisted Pair PortsPort LEDs
Figure 1 Front and Back Panels
AC Power Connector
3
Product Description
Hardware Feature Description
The following sections describe hardware features of the AT-GS908
Gigabit Ethernet switch:
Twisted Pair Ports
System and Port LEDs
AC Power Connector
Twisted Pair
Ports
The AT-GS908 switch feature 8 twisted pair ports.
Type of Connector
The twisted pair ports feature 8-pin RJ-45 connectors. (For the port
pinouts, refer to RJ-45 Twisted Pair Port Pinouts on page 29.
Speed
The ports are 10Base-T, 100Base-TX, and 1000Base-T compliant and are
capable of 10 megabits per second (Mbps), 100 Mbps, and 1000 Mbps
speeds. The ports are IEEE 802.3u Auto-negotiation compliant. With
Auto-negotiation, the switch automatically matches the highest
possible common speed between each switch port and each end-node.
For example, if an end-node is capable of only 10 Mbps, the switch sets
the port connected to the end-node to 10 Mbps.
Duplex Mode
Each twisted pair port on the switch can operate in either half- or full
duplex mode. The twisted pair ports are IEEE 802.3u-compliant and will
Auto-Negotiate the duplex mode setting.
Note
In order for the switch to set the duplex mode for each port
correctly, the end-nodes that you connect to the switch ports
should also use Auto-negotiation. Otherwise, a duplex mode
mismatch can occur, affecting network performance. For further
information, refer to Duplex Mode on page 8.
Maximum Distance
Each twisted pair port has a maximum operating distance of 100 m
(328 feet).
Type of Cabling
For 10 Mbps operation, Category 3 or better 100 ohm shielded or
unshielded twisted pair cabling is required. For 100 or 1000 Mbps
operation, Category 5 and Enhanced Category 5 (5E) 100 ohm shielded
or unshielded twisted pair cabling is required.
4
AT-GS908 Gigabit Ethernet Switch Installation Guide
Auto-MDI
For port speeds of 10 or 100 Mbps, the ports are auto-MDI. They
automatically configure themselves as either MDI or MDI-X. This feature
allows you to use either straight-through or crossover twisted pair
cables to connect devices to the ports. For port speeds of 1000 Mbps,
you must use a straight through twisted pair cable.
LEDs The port LEDs on the front panel display port status information. Each
port has four LEDs.
Figure 2 LEDs
Table 1 describes the AT-GS908 port LEDs.
Table 1 Port LED Descriptions
LED State Description
10 Solid Green Indicates that the port is operating at 10
Mbps.
100 Solid Green Indicates that the port is operating at 100
Mbps.
10 and
100
Solid Green Indicates that the port is operating at
1000 Mbps.
ACT OFF Indicates that there is no activity on the
port.
Flashing Green Indicates that the port is transmitting
and/or receiving data packets.
FDX OFF Indicates that the port is operating in
half-duplex mode.
Solid Green Indicates that the port is operating in full-
duplex mode.
5
Product Description
AC Power
Connector
AT-GS908 switch has a single AC power supply socket on the back panel,
which has autoswitch AC inputs. Refer to Technical Specifications on
page 25, for the input voltage range. To power ON or OFF the switch,
you connect or disconnect the power cord.
6
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