Allied Telesis AT-FS202 Series User manual

AT-FS201
AT-FS202
AT-FS202SC/FS1
AT-FS202SC/FS2
AT-FS202SC/FS3
AT-FS202SC/FS4
Fast Ethernet Series Switches
Installation Guide
PN 613-10761-00 Rev E

Copyright ©2004 Allied Telesyn International, Corp.
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.

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 EN55024 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 models) 9
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.

Electrical Safety and Emission Compliance Statement
iv
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.
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 näet -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
Electrical Safety and Emission Compliance Statement ......................iii
Welcome to Allied Telesyn .........................................................................vii
Where to Find Web-based Guides ..................................................................vii
Document Conventions ...................................................................................vii
Contacting Allied Telesyn ..............................................................................viii
Online Support ........................................................................................viii
Email and Telephone Support ................................................................viii
For Sales or Corporate Information .......................................................viii
Chapter 1
Description ...................................................................................................... 1
Key Features ...................................................................................................... 4
Status LEDs ....................................................................................................... 4
Twisted-Pair Port .............................................................................................. 5
Port Speed ................................................................................................... 5
Duplex Mode ............................................................................................... 5
Auto MDI/MDI-X ........................................................................................ 6
Fiber Optic Port ................................................................................................. 6
Port Speed ................................................................................................... 6
Duplex Mode ............................................................................................... 6
Switch Performance ........................................................................................... 7
DIP Switches .............................................................................................. 7
MAC Address Table .................................................................................... 7
Store and Forward ...................................................................................... 8
External AC/DC Power Adapter ................................................................ 8
Network Topologies ........................................................................................... 8
Chapter 2
Installing the Switch ................................................................................... 11
Verifying Package Contents ............................................................................ 11
Planning the Installation ................................................................................ 12
Selecting a Site ......................................................................................... 14
Installing the Switch ....................................................................................... 15
Warranty Registration .................................................................................... 17

Table of Contents
vi
Chapter 3
Troubleshooting ...........................................................................................19
Appendix A
Technical Specifications ............................................................................21
Physical ............................................................................................................21
Temperature ....................................................................................................21
Electrical Rating ..............................................................................................21
Agency Certifications .......................................................................................22
Fiber Optic Port Specifications .......................................................................22
Pinout Assignments .........................................................................................24
Appendix B
Translated Safety and Emission Information .......................................27

vii
This guide contains instructions on how to install the AT-FS20x and
AT-FS202SC/FSx Series switches.
Where to Find Web-based Guides
The Allied Telesyn web site at www.alliedtelesyn.com offers you an easy
way to access the most recent documentation, software, and technical
information for all of our products. For product guides, select “Support &
Services” from our web site.
Document Conventions
This guide uses the following conventions:
Note
Notes provides additional information.
Caution
Cautions indicate that performing or omitting a specific action may
result in equipment damage or loss of data.
Warning
Warnings 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
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: www.alliedtelesyn.com/kb.
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
For Technical Support via email or telephone, refer to the Support & Services
section of the Allied Telesyn web site: www.alliedtelesyn.com.
For Sales or Corporate Information
You can contact Allied Telesyn for sales or corporate information at our web
site: www.alliedtelesyn.com. To find the contact information for your country,
select Contact Us then Worldwide Contacts.

1
Chapter 1
Description
The AT-FS20x and AT-FS202SC/FSx Series Switches include the following
models:
The AT-FS20x Series switches are designed to extend the distance of your
network by converting Fast Ethernet data between twisted-pair cabling and
either multimode or single-mode fiber optic cabling. These dual-port switches
can also be used to improve the performance of your network by dividing it
into smaller, more manageable segments.
Each switch features a 100Base-FX fiber optic port and a 10Base-T/
100Base-TX twisted-pair port. The fiber optic port has either a SC or ST
connector and a maximum operating distance of 2 kilometers (1.2 miles) to
100 kilometers (62 miles), depending on the model. The twisted-pair port has
an RJ-45 connector with a maximum operating distance of 100 meters (328
feet).
The fiber optic port operates at 100 Mbps, while the twisted-pair port operates
at 10 Mbps or 100 Mbps. Both ports feature half- and full-duplex operation.
All of the AT-FS20x Series switches can be installed on a desktop or in an
AT-MCR12 chassis. These switches are easy to install and do not require
software configuration or management. This guide provides installation
instructions for installing the AT-FS20x Series Switches on a desktop. To
install the switches in an AT-MCR12 chassis, see AT-MCR12 Chassis
Installation Guide (PN 613-10725-00).
❑AT-FS201 ❑AT-FS202SC/FS2
❑AT-FS202 ❑AT-FS202SC/FS3
❑AT-FS202SC/FS1 ❑AT-FS202SC/FS4

Description
2
Figure 1 illustrates the front panel of an AT-FS20x Series switch.
Figure 1 AT-FS20x Series Front Panel (AT-FS202 Model)
Figure 2 illustrates a front panel of an AT-FS202SC/FSx Series switch.
Figure 2 AT-FS202SC/FSx Series Front Panel (AT-FS202SC/FS4 Model)
The back panel of the AT-FS20x and AT-FS202SC/FSx Series switches
features a power adapter connector and DIP switches for manually
configuring the ports. Figure 3 illustrates the back panel.
Figure 3 Back Panel of the AT-FS20x and AT-FS202SC/FSx Series Switches
10Base-T/
100Base-TX
AT-FS202 FAST ETHERNET SWITCH IEEE 802.3 /802.3U
LNK/
ACT
FD/
COL
PWR
AUTO
NEG
100M
LNK/
ACT
FD/COL
PORT 2
100Base-FX TX RX
PORT 1
CLASS 1
LASER PRODUCT
AT-FS202SC/FS4 FAST ETHERNET SWITCH IEEE 802.3 /802.3U
LNK/
ACT
FD/
COL
PWR
AUTO
NEG
100M
LNK/
ACT
FD/COL
PORT 2
100Base-FX TX RX
PORT 1
10Base-T/
100Base-TX
CLASS 1
LASER PRODUCT
DO NOT STARE
INTO BEAM
SINGLE MODE
12 V D C
21 34
1222
PORT
10
100
HALF
FULL
OFF
ON
DUPLEX
MODE AUTO NEG
SPEED
(Mbps)
DIP Switches
DC Receptacle

AT-FS20x Series Installation Guide
3
Table 1 lists the maximum operating distances for the switches.
Table 1 Maximum Operating Distances
Model
100Base-FX 10/100Base-TX
Connector
Maximum
Operating
Distance1
1. Maximum distance for 100 Mbps optical datalinks is dependent on the following factors: type of optical
fiber, duplex mode of both end-nodes, and maximum optical loss budget for each of the optical fiber at
the operating optical wavelength.
Connector
Maximum
Operating
Distance2
2. Maximum distance can only be obtained when the UTP/STP cabling is installed and verified to TIA/EIA
568A Commercial Building Telecommunications Cabling Standard.
AT-FS201 ST 2 km (1.2 mi) RJ-45 100 m (328 ft)
AT-FS202 SC 2 km (1.2 mi) RJ-45 100 m (328 ft)
AT-
FS202SC/
FS1
SC 15 km (9.3 mi) RJ-45 100 m (328 ft)
AT-
FS202SC/
FS2
SC 40 km (24.8
mi)
RJ-45 100 m (328 ft)
AT-
FS202SC/
FS3
SC 75 km (46.5
mi)
RJ-45 100 m (328 ft)
AT-
FS202SC/
FS4
SC 100 km (62 mi) RJ-45 100 m (328 ft)

Description
4
Key Features
The AT-FS20x switches have the following features:
❑LEDs for unit and port status
❑Auto MDI/MDI-X
❑DIP switches for configuring the ports
❑Half- or full-duplex operation on both ports
❑RJ-45 twisted-pair connector
❑SC or ST fiber optic connector
❑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
❑External AC/DC power adapters (North America, Continental Europe,
or United Kingdom)
❑For use on a desktop or in an AT-MCR12 chassis
Status LEDs
Table 2 defines the LEDs for the switches.
Table 2 Status LEDs
LED Color Description
PWR Green Power is applied to the switch.
LNK/ACT Green
Blinking
A valid link has been established on the port.
Data is being received or transmitted on the port.

AT-FS20x Series Installation Guide
5
Twisted-Pair Port
The AT-FS20x and AT-FS202SC/FSx Series switches have one 10Base-T/
100Base-TX twisted-pair port. The twisted-pair port features an RJ-45
connector.
Port Speed
The twisted-pair port is compliant with the 10Base-T and 10Base-TX
standards and is capable of either 10 Mbps or 100 Mbps operation. You can set
the port speed manually or, since the port is IEEE 802.3u Auto-Negotiation
compliant, you can allow the switch to set the port speed automatically. With
Auto-Negotiation, the speed of the port is set automatically by the switch after
it determines the speed of the end-node connected to the port. Auto-
Negotiation ensures that the port on the switch and the end-node are
operating at the same speed and that they are communicating at the highest
possible common speed of the devices.
Duplex Mode
Duplex mode refers to the way an end-node sends and receives data on the
network. An end-node can operate in either half- or full-duplex mode,
depending on its capabilities. An end-node that is operating in half-duplex
mode can either send data or receive data, but it cannot do both at the same
time. An end-node that is operating in full-duplex mode can send and receive
data simultaneously. The best network performance is achieved when an end-
node can operate at full-duplex, since the end-node is able to send and receive
data simultaneously.
100M Green
OFF
The twisted-pair port is operating at 100 Mbps.
The twisted-pair port is operating at 10 Mbps.
FD/COL Green
OFF
Blinking
The switch is operating in full-duplex mode.
The switch is operating in half-duplex mode.
A collision has been detected on the port.
AUTO
NEG
Green
OFF
Auto-Negotiation on the twisted-pair port is enabled.
Auto-Negotiation on the twisted-pair port is disabled.
LED Color Description

Description
6
The twisted-pair port on the switch can operated in either half- or full-duplex
mode. You can set the duplex mode manually or allow the switch to set it
automatically through Auto-Negotiation. With Auto-Negotiation, if the end-
node is capable of full-duplex mode, the twisted-pair port is set automatically
to full-duplex mode. If the end-node is capable of half-duplex mode, the port is
set automatically to half-duplex mode.
Auto MDI/MDI-X
An RJ-45 twisted-pair port on a 10 Mbps or 100 Mbps Ethernet network
device can have one of two possible wiring configurations: MDI or MDI-X. The
RJ-45 port on a PC, router, or bridge is typically wired as MDI, while the
twisted-pair port on a switch or hub is usually MDI-X.
To connect two 10 Mbps or 100 Mbps network devices together that have
dissimilar port wiring configurations, such as MDI to MDI-X, use a straight-
through twisted-pair cable. To connect two network devices that have the
same wiring configuration, such as MDI to MDI, use a crossover cable.
The AT-FS20x switches feature automatic MDI/MDI-X. The RJ-45 port
automatically determines the configuration of the port on the device to which
it is connected and then configures itself appropriately. For example, if a port
on a switch is connected to a port on a bridge, which is typically wired as MDI,
the port on the switch automatically configures itself as MDI-X. This feature
allows you to use either crossover cables or straight-through cables when
connecting a device to the twisted-pair port.
Fiber Optic Port
The AT-FS20x switches have one 100Base-FX fiber optic port. The fiber optic
port features either an SC or ST connector.
Port Speed
The fiber optic port is compliant with the 100Base-FX standard and has a
fixed operating speed of 100 Mbps. The end-node connected to the fiber optic
port on the switch must also be able to operate at 100 Mbps.
Duplex Mode
The fiber optic port on the switch can operate in half- or full-duplex mode. You
must set the duplex mode manually using the DIP switches on the back of the
unit.

AT-FS20x Series Installation Guide
7
Switch Performance
The AT-FS20x switches have the following performance values:
❑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
❑Storage for up to 4,000 MAC addresses
❑280 kilo bytes (per port) packet buffer
❑Low latency 15.6 µs (64-byte packet, 100 Mbps full-duplex)
DIP Switches
The DIP switches are used to manually configure the operating characteristics
of the ports. These characteristics include the port speed, duplex mode, and
Auto-Negotiation.
On the 100Base-FX fiber optic port, you can manually set the duplex mode to
either half- or full-duplex.
On the 10Base-T/100Base-TX twisted-pair port, you can manually set the
speed of the port to either 10 Mbps or 100 Mbps, set the duplex mode to either
half- or full-duplex and enable or disable Auto-Negotiation. Enabling Auto-
Negotiation automatically sets the port’s speed and duplex mode.
MAC Address Table
Up to 4,000 MAC addresses can be stored in the switch’s MAC address table.
After power-up, the switch’s self-learning feature learns new addresses in
real-time. If the source address of an incoming packet is not found in the MAC
address table, the switch updates the table with the new address.
The switch also has an automatic address aging feature that deletes a source
address from the table if it has not received a frame from the end-node with
that address within five minutes. This prevents the table from becoming filled
with addresses of end-nodes that are no longer active.
The switch forwards all multicast, broadcast, and unicast packets when the
MAC address table has exceeded its storage limit.

Description
8
Store and Forward
The AT-FS20x switches support store and forward switching at Fast Ethernet
full-wire speed in 100 Mbps, half- or full-duplex mode. Packets entering each
port are stored in buffers. Once the packet is received, the switch forwards or
discards the packet, depending on its destination address and error status.
This ensures that only error-free packets destined for another segment are
transferred across the switch, reducing the network load. For example, if the
packet entering from Port 1 is destined for an end-node on Port 2, the switch
forwards the frame as long as the frame does not contain any errors. If the
packet from Port 1 is destined for an end-node also connected to Port 1, the
packet is discarded.
The switch discards CRC errors, misaligned, runt, and under or oversized
packets. When the packet has dribble bits at the end, the switch truncates to
the octet boundary and checks for a good CRC before forwarding.
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 100 and 240V AC
versions with an unregulated output of 12V DC.
Network Topologies
This section provides an illustration of a typical network topology with an
AT-FS202 Series switch.

AT-FS20x Series Installation Guide
9
Figure 4 illustrates a topology using one AT-FS202 switch to interconnect two
small networks of stackable hubs.
Figure 4 Typical Configuration Using the AT-FS202 Switch
AT-8026C
AT-FS202
AT-FS708
170
Twisted Pair
Fiber Optic

Description
10

11
Chapter 2
Installing the Switch
This chapter explains how to install an AT-FS20x and AT-FS202SC/FSx
Series switches. These switches can be installed on a desktop or in an
AT-MCR12 chassis. The procedures provided in this chapter are for
installation on a desktop. To install a switch in the AT-MCR12 chassis, see the
AT-MCR12 Chassis Installation Guide.
Verifying Package Contents
Make sure the following items are included in your package. If any item is
missing or damaged, contact your Allied Telesyn sales representative for
assistance.
❑One AT-FS20x or AT-FS202SC/FSx Series switch
❑Four protective feet (for desktop use only)
❑External AC/DC power adapter (North America, Continental Europe,
or United Kingdom)
❑This installation guide
❑Warranty card

Installing the Switch
12
Planning the Installation
Be sure to observe the following guidelines when planning the installation of
your switch.
❑The end-node connected to the 100Base-FX fiber optic port must be
able to operate at 100 Mbps.
❑The end-node connected to the 10Base-T/100Base-TX twisted-pair
port can operate at either 10 Mbps or 100 Mbps.
❑The end-node connected to a port on the switch can be a network
adapter card, repeater, router, hub, or another switch.
❑The twisted-pair cabling must be kept away from sources of electrical
noise, such as radios, transmitters, power lines, broadband amplifiers,
electrical motor, and fluorescent fixtures.
❑Refer to Table 3 for the cabling specifications for the twisted-pair port.
Table 3 10Base-T/100Base-TX twisted-pair Cabling Specifications
❑Refer to Table 4 for the cabling specifications for the fiber optic port
operating in full-duplex mode.
Table 4 100Base-FX Fiber Optic Cabling Specifications (Full-duplex)
Operating
Mode Cable Type
Maximum
Operating
Distance
10Base-T Shielded or unshielded Category 3 or
better
100 m (328 ft)
100Base-TX Shielded or unshielded Category 5 or
better
100 m (328 ft)
Model Cable Type
Maximum
Operating
Distance1
Maximum
Allowable Loss
Budget
AT-FS201 50/125 or 62.5/
125 micron
multimode
2 km (1.2 mi) 13 dB at 1310 nm