Allied Telesis AT-FS201ST/FS1 User manual

AT-FS201
AT-FS201ST/FS1, FS2, FS3
AT-FS202
AT-FS202SC/FS1, FS2, FS3
AT-FS203
Fast Ethernet Switches
Installation Guide
PN 613-10761-00 Rev B

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 fro 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 Allie
Telesyn International, Corp. 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
Safety Warnings
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 1997 3
Warning: This product requires shielded cables to comply with emission and immunity
standards. If it is used with unshielded cables, the user may be required to take measures
to correct the interference problem at their own expense. 4
Electrical Safety EN60950, UL1950, CSA 950 5
Laser EN60825 6
Warning Class 1 Laser product. 7
Warning Do not stare into the Laser beam. 8
At time of installation, the Fiber Optic Lasers comply with FDA Radiation Performance
Standard 21CFR Subchapter J, applicable at date of manufacture.
This is a “CLASS 1 LED PRODUCT” (AT-FS201, AT-FS202, AT-FS203 models) 9
Important: Appendix B contains translated safety statements for installing this
equipment. When you see the , go to Appendix B for the translated safety statement in
your language.
Wichtig: Anhang B enthält übersetzte Sicherheitshinweise für die Installation dieses
Geräts. Wenn Sie sehen, schlagen Sie in 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 , skal 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 ziet, raadpleeg Appendix B voor vertaalde
veiligheidsinstructies in uw taal.
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 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 of by the manufacturer or the
FCC, can void your right to operate this equipment.
Industry Canada
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.

Safety Warnings
iv
Important: L'annexe B contient les instructions de sécurité relatives à l'installation de cet
équipement. Lorsque vous voyez le symbole , reportez-vous à l'annexe B pour consulter
la traduction de ces instructions dans votre langue.
Tärkeää: Liite B sisältää tämän laitteen asentamiseen liittyvät käännetyt turvaohjeet.
Kun näe -symbolin, katso käännettyä turvaohjetta liitteestä B.
Importante: l’Appendice B contiene avvisi di sicurezza tradotti per l’installazione di
questa apparecchiatura. Il simbolo , indica 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 , åpner du til Tillegg B 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 , 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 , skall du gå till Bilaga B för att läsa det översatta
säkerhetsmeddelandet på ditt språk.

v
Table of Contents
Safety Warnings ............................................................................................ iii
Table of Contents ........................................................................................... v
Welcome to Allied Telesyn ......................................................................... vii
Where to Find Web-based Guides ................................................................... vii
Document Conventions .................................................................................... vii
Contacting Allied Telesyn ............................................................................... viii
Online Support ......................................................................................... viii
For Technical Support and Services........................................................viii
Technical Support E-mail Addresses ......................................................viii
Returning Products ........................................................................................... ix
FTP Server......................................................................................................... ix
For Sales or Corporate Information .................................................................. x
Tell Us What You Think .................................................................................... x
Chapter 1
Description ...................................................................................................... 1
Key Features....................................................................................................... 6
Switch Performance .................................................................................... 7
Status LEDs ................................................................................................ 8
External AC/DC Power Adapter................................................................. 8
MDI/MDI-X Switch ..................................................................................... 9
Configuration Switches............................................................................... 9
Functional Description..................................................................................... 10
Frame Processing ...................................................................................... 10
Address Recognition and Filtering........................................................... 10
Network Topologies .......................................................................................... 11
Chapter 2
Installing the Switch ................................................................................... 13
Verifying the Package Contents ...................................................................... 13
Planning the Installation ................................................................................. 14
Selecting a Site ................................................................................................. 16
Installing the Switch ........................................................................................ 17
Warranty Registration ..................................................................................... 20
Troubleshooting................................................................................................ 20
Is the Switch Receiving Power?................................................................ 20
Connectivity Testing ................................................................................. 21

Table of Contents
vi
Is the Link LED Lit? ................................................................................. 21
Technical Support and Service ........................................................................ 22
Appendix A
Technical Specifications ............................................................................ 23
Pinout Assignments.......................................................................................... 26
Appendix B
Electrical Safety and Installation Requirements ................................. 27
Appendix C
Technical Support Fax Order ................................................................... 37
Incident Summary ............................................................................................ 37
Appendix D
AT-FS201, AT-FS202 and AT-FS203 Series
Installation Guide Feedback ..................................................................... 39

vii
This guide contains instructions on how to install the AT-FS201, AT-FS202,
and AT-FS203 Series of Fast Ethernet Switches.
Where to Find Web-based Guides
The Allied Telesyn web site at www.alliedtelesyn.com provides you with an
easy way to access the most recent documentation and technical information
for all of our products. For product guides, you can go directly to the following
web page: www.alliedtelesyn.com/support/lib_allproducts.htm.
Document Conventions
This guide uses several conventions that you should become familiar with first
before you begin to install 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 to Allied Telesyn
viii
Contacting Allied Telesyn
There are several ways to contact Allied Telesyn technical support: online,
telephone, fax, and e-mail.
Online Support
You can request technical support online by filling out the Tech-Assistant
Form at www.alliedtelesyn.com/support.htm.
For Technical Support and Services
Technical Support E-mail Addresses
United States and Canada
[e-mail]
Latin America, Mexico, Puerto Rico, 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], 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-FS200 Series 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 locations:
FTP Server
If you need a device driver for an Allied Telesyn device, such as an AT-8224XL
Fast Ethernet Switch, you can download the driver from 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
2205 Ringwood Ave
San Jose, CA 95131
Tel: [phone], 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 to Allied Telesyn
x
For Sales or Corporate Information
Tell Us What You Think
If you have any comments or suggestions on how we might improve this or
other Allied Telesyn documents, you can fill out the “AT-FS201, AT-FS202
and AT-FS203 Series Installation Guide Feedback” on page 39 and return the
form to us at the address or fax number provided. You can also provide
feedback online by filling out the Feedback on Documentation form at
www.alliedtelesyn.com/forms/feedbackman.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
Description
The AT-FS201, AT-FS202, and AT-FS203 Series of Fast Ethernet Switches
are designed to interconnect LAN devices and subnetworks over large
distances into an integrated network. These dual-port switches can also be
used to improve the performance of your network by dividing it into smaller,
more manageable segments.
The AT-FS201 and AT-FS202 Switches feature one 10/100Base-TX twisted
pair port with an operating distance of 100 meters (328 feet), and a
100Base-FX fiber optic port with an operating distance of 2 kilometers (1.2
miles) to 75 kilometers (46.5 miles), depending on the model.
The AT-FS203 Switch features two 10/100Base-TX ports, each with a
maximum distance of 100 meters (328 feet).
These Fast Ethernet switches can be installed either as standalone units,
such as on a table, or in an AT-MCR12 or AT-TRAY4 Chassis. They are easy
to install and do not require software configuration or management. The
following figures illustrate the front and rear panels of each switch.
Figure 1 AT-FS201 Front Panel
10Base-T/
100Base-TX
AUTO NEG
10Base-T/
100Base-TX
MDI MDI-X
FS201 FAST ETHERNET SWITCH IEEE 802.3 / 802.3U
AUTO NEG
TX
RX
COL
LNK
PWR
100
FD
MDI MDI-X
TX
RX
COL
LNK
100
FD
PORT 2PORT 1
TX RX

Description
2
Figure 2 AT-FS202 Front Panel
Figure 3 AT-FS203 Front Panel
Figure 4 Rear Panel of the AT-FS203 Switch
10Base-T/
100Base-TX
AUTO NEG
10Base-T/
100Base-TX
MDI MDI-X
FS202 FAST ETHERNET SWITCH IEEE 802.3 / 802.3U
AUTO NEG
TX
RX
COL
LNK
PWR
100
FD
MDI MDI-X
TX
RX
COL
LNK
100
FD
PORT 2PORT 1
TX RX
10Base-T/
100Base-TX
AUTO NEG
10Base-T/
100Base-TX
MDI MDI-X
FS203 FAST ETHERNET SWITCH IEEE 802.3 / 802.3U
AUTO NEG
TX
RX
COL
LNK
PWR
100
FD
MDI MDI-X
TX
RX
COL
LNK
100
FD
PORT 2PORT 1
12 V D C
21 1212
PORT
10
100
HALF
FULL
OFF
ON
DUPLEX
MODE AUTO NEG
SPEED
(Mbps)
1522
1518
BYTES
321 4567

AT-FS200 Series Installation Guide
3
Figure 5 AT-FS201ST Series Front Panel
CLASS 1
LASER PRODUCT
DO NOT STARE
INTO BEAM
100Base-FX 10Base-T/
100Base-TX
FS201ST/FS3 FAST ETHERNET SWITCH IEEE 802.3 / 802.3U
AUTO NEG
TX
RX
COL
LNK
PWR
100
FD
MDI MDI-X
TX
RX
COL
LNK
100
FD
PORT 2PORT 1 SINGLE MODE
TX RX
CLASS 1
LASER PRODUCT
DO NOT STARE
INTO BEAM
100Base-FX 10Base-T/
100Base-TX
FS201ST/FS2 FAST ETHERNET SWITCH IEEE 802.3 / 802.3U
AUTO NEG
TX
RX
COL
LNK
PWR
100
FD
MDI MDI-X
TX
RX
COL
LNK
100
FD
PORT 2PORT 1 SINGLE MODE
TX RX
CLASS 1
LASER PRODUCT
DO NOT STARE
INTO BEAM
100Base-FX 10Base-T/
100Base-TX
FS201ST/FS1 FAST ETHERNET SWITCH IEEE 802.3 / 802.3U
AUTO NEG
TX
RX
COL
LNK
PWR
100
FD
MDI MDI-X
TX
RX
COL
LNK
100
FD
PORT 2PORT 1 SINGLE MODE
TX RX
AT-FS201ST/FS1
AT-FS201ST/FS2
AT-FS201ST/FS3

Description
4
Figure 6 AT-FS202SC Series Front Panels
AT-FS202SC/FS1
AT-FS202SC/FS2
AT-FS202SC/FS3
100Base-FX
10Base-T/
100Base-TX
AUTO NEG
TX
RX
COL
LNK
PWR
100
FD
MDI MDI-X
TX
RX
COL
LNK
100
FD
FS202SC/FS1 FAST ETHERNET SWITCH IEEE 802.3 / 802.3U
PORT 2PORT 1 SINGLE MODE
CLASS 1
LASER PRODUCT
DO NOT STARE
INTO BEAM
TX RX
100Base-FX
10Base-T/
100Base-TX
AUTO NEG
TX
RX
COL
LNK
PWR
100
FD
MDI MDI-X
TX
RX
COL
LNK
100
FD
FS202SC/FS2 FAST ETHERNET SWITCH IEEE 802.3 / 802.3U
PORT 2PORT 1 SINGLE MODE
CLASS 1
LASER PRODUCT
DO NOT STARE
INTO BEAM
TX RX
100Base-FX
10Base-T/
100Base-TX
AUTO NEG
TX
RX
COL
LNK
PWR
100
FD
MDI MDI-X
TX
RX
COL
LNK
100
FD
FS202SC/FS3 FAST ETHERNET SWITCH IEEE 802.3 / 802.3U
PORT 2PORT 1 SINGLE MODE
CLASS 1
LASER PRODUCT
DO NOT STARE
INTO BEAM
TX RX

AT-FS200 Series Installation Guide
5
Figure 7 illustrates the rear panel of the AT-FS201SC and AT-FS202ST
Series Switches.
Figure 7 Rear Panel of the AT-FS201SC and AT-FS202ST Switches
Table 1 Maximum Operating Distance
Model
Type of Connector Maximum Distance
Port 1 Port 2 Port 1 Port 2
AT-FS201 RJ-45 ST 100 m (328 ft) 2 km (1.2 mi)
AT-FS201ST/FS1 RJ-45 ST 100 m (328 ft) 15 km (9.3 mi)
AT-F201ST/FS2 RJ-45 ST 100 m (328 ft) 40 km (24.8 mi)
AT-FS201ST/FS3 RJ-45 ST 100 m (328 ft) 75 km (46.5 mi)
AT-FS202 RJ-45 SC 100 m (328 ft) 2 km (1.2 mi)
AT-FS202SC/FS1 RJ-45 SC 100 m (328 ft) 15 km (9.3 mi)
AT-FS202SC/FS2 RJ-45 SC 100 m (328 ft) 40 km (24.8 mi)
AT-FS202SC/FS3 RJ-45 SC 100 m (328 ft) 75 km (46.5 mi)
AT-FS203 RJ-45 RJ-45 100 m (328 ft) 100 m (328 ft)
12 V D C
21 345
1222
PORT
10
100
HALF
FULL
OFF
ON
DUPLEX
MODE AUTO NEG
SPEED
(Mbps)
1522
1518
BYTES

Description
6
Key Features
The switches have the following key features:
❑LEDs for unit and port status
❑MDI/MDI-X switch
❑External AC/DC power adapters (North America, Continental Europe,
or United Kingdom)
❑DIP switches for configuring the ports
❑Full- or half-duplex operation on both ports
❑ST or SC fiber optic connectors
❑Data packet forwarding and filtering at full wire speed (10 Mbps to
100 Mbps, 100 Mbps to 100 Mbps, and 10 Mbps to 10 Mbps)
❑Store and forward switching mode
❑Automatic address learning and aging
❑IEEE 802.3u compliant auto-negotiation
❑Standard, compact size for use on a tabletop or in an AT-MCR12 or
AT-TRAY4 Chassis

AT-FS200 Series Installation Guide
7
Switch Performance
The switches perform at:
❑148,800 pps for 100 Mbps and 14,880 pps for 10 Mbps for full wire
speed forwarding and filtering
❑200 Mbps maximum throughput in 100 Mbps, full-duplex mode
❑20 Mbps maximum throughput in 10 Mbps, full-duplex mode
❑Up to 8,192 unicast MAC addresses and unlimited multicast/
broadcast addresses
❑280 kib bytes (per port) packet buffer
❑Low latency 14.3 µs (64-byte packet, 100 Mbps full-duplex)
Note
For definitions of technical terms associated with Allied Telesyn
products, refer to the Glossary on Allied Telesyn’s web site at
www.alliedtelesyn.com/support/gloss_a.htm.

Description
8
Status LEDs
Table 2 defines the switch LEDs.
External AC/DC Power Adapter
The power adapter supplies 12V DC to the switch. Allied Telesyn supplies an
approved safety compliant AC power adapter for the 120 and 240V AC
versions with an unregulated output of 12V DC.
Figure 8 External AC/DC Power Adapter (North American version shown)
Table 2 LEDs
LED State Color Description
PWR ON Green Power is applied.
LNK ON Green Link established on the port.
100 ON
OFF
Green The port is operating at 100 Mbps.
The port is operating at 10 Mbps.
FD ON
OFF
Amber Full-duplex mode is enabled (two-way independent
transmission).
Half-duplex mode is enabled, indicating transmission
only in one direction at a time.
AUTO NEG ON Green Auto-negotiation is enabled on the port.
TX ON Green Data is being transmitted on the port.
RX ON Green Data is being received on the port.
COL ON Amber The port is sensing a collision signal.

AT-FS200 Series Installation Guide
9
MDI/MDI-X Switch
The MDI/MDI-X (Media Dependent Interface/Media Dependent Interface with
Crossover) switch, located on the front panel, is a straight-through or
crossover cable selection switch. It enables the RJ-45 port to be connected to a
repeater or DTE device without using a special crossover cable. The default
setting of the switch is MDI-X, which means you can connect the RJ-45 port to
a workstation or to any other DTE device that uses a straight-through cable.
For the MDI configuration, slide the switch to the MDI position and connect
the RJ-45 port to a repeater, hub, or switch using a straight-through cable.
See Figure 9.
Figure 9 MDI/MDI-X Switch
Configuration Switches
The configuration switches on the rear panel of the unit are used to configure
the operating characteristics of the port, such as it’s port speed and duplex
mode, and the maximum packet size allowed by the switch.
Configuring a 100Base-FX fiber optic port involves setting its duplex mode to
either half- or full-duplex. Configuring a 10/100Base twisted pair port involves
setting the speed and duplex mode. You can have the switch do this
automatically through auto-negotiation or you can set these values manually.
The Byte switch controls the maximum packets size that the unit will allow.
You can set the switch to either 1518 bytes, which is the normal Ethernet
packet size or to 1522 bytes, which make the Ethernet unit compliant with the
IEEE 802.1Q VLAN tagging standard.
10Base T/
100Base-TX 10Base-T/
100Base-TX
MDI MDI-X MDI MDI-X
PORT 2PORT 1
10Base-T/
100Base-TX
AUTO NEG
10Base-T/
100Base-TX
MDI MDI-X
FS203 FAST ETHERNET SWITCH IEEE 802.3 / 802.3U
AUTO NEG
TX
RX
COL
LNK
PWR
100
FD
MDI MDI-X
TX
RX
COL
LNK
100
FD
PORT 2PORT 1

Description
10
Functional Description
The AT-FS200 series of switches function as unmanaged dual-port switches.
Frame Processing
The switches support store and forward switching at Fast Ethernet full-wire
speed either in 10 or 100 Mbps, half- or full-duplex mode. Packets entering
each port are stored in buffers. After the full packet is received, it is forwarded
or discarded depending on its destination address and error status. This
ensures that only error-free data packets destined for another segment will be
transferred across the switch, reducing network load. For example, if the
packet entering from Port 1 is destined for an end station on Port 2, it will be
forwarded if the Frame Check Sequence (FCS) is valid. If the packet from Port
1 is destined for an end station also attached to Port 1, then the packet is
discarded.
The switch will discard CRC error, misaligned, runt, and under-sized/over-
sized packets. When the packet has dribble bits at the end, the switch will
truncate to octet boundary and check for a good FCS before forwarding.
Address Recognition and Filtering
Up to 8,192 MAC addresses can be stored in the MAC address table. The
switch will learn all new addresses in real-time after power-up with its
address self-learning mechanism. If the source address of an incoming packet
is not found in the address table, the switch waits until the end of the packet
to check for good CRC and then updates its MAC address table. Because the
switch has Automatic Address Aging, if a source address entry in the table is
not updated within five minutes, the entry is deleted from the table. The
switch forwards multicast, broadcast, and unicast packets when the MAC
address table size is exceeded.