Allied Telesis AT-MC101XL User manual

AT-MC101XL
AT-MC102XL
AT-MC103XL
AT-MC103LH
AT-MC103SC/FS3, FS4
AT-MC103ST/FS3, FS4
Version 3 Fast Ethernet Media Converters
Installation Guide
PN 613-10771-00 Rev D

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 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 B ! 1
Immunity EN50082- 997 ! 2
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. ! 3
Electrical Safety EN60950, UL 950, CSA 950 ! 4
U.S. Federal Communications Commission
DEC ARATION OF CONFORMITY
Manufacture Name: Allied Telesyn International, Corp.
Manufacture Address: 960 Stewart Drive, Suite B
Sunnyvale, CA 94086 USA
Manufacture Telephone: [phone]
Declares that the Product: Fast Ethernet Media Converters
Model Numbers: AT-MC 0 XL, AT-MC 02XL, AT-MC 03XL,
AT-MC 03LH, AT-MC 03SC/FS3, AT-MC 03ST/FS4,
AT-MC 03SC/FS4, AT-MC 03ST/FS4
This product complies with FCC Part 5B, Class B Limits:
This device complies with part 5 of the FCC Rules. Operation is subject to the
following two conditions: ( ) This device must not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
RADIATED ENERGY
Note: This equipment has been tested and found to comply with the limits for a Class B
digital device pursuant to Part 5 of 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 instructions, may 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 the receiver.
- Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Changes and modifications not expressly approved by the manufacturer or registrant
of this equipment can void your authority to operate this equipment under Federal
Communications Commission rules.
Warning: This product requires only Category 3, 4, or 5 shielded twisted-pair cable for
all 0 Mbps RJ-45 connections, and Category 5 shielded twisted-pair for all 00 Mbps
RJ-45 connections to comply with Class B emission limits. If not used with shielded
cables, this product may cause radio interference in which case the user may be
required to take adequate measures to reduce interference levels.
Industry Canada
This Class B digital apparatus meets all requirements of the Canadian Interference-
Causing Equipment Regulations.
Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur
le matériel brouilleur du Canada.

iv
aser EN60825 ! 5
Power to the hub must be sourced only from the adapter. ! 10
USA/CANADA
Use a UL Listed/CSA Certified AC adapter of DC 2V, 500mA.
EUROPE - EU
Use TÜV licensed AC adapter of DC 2V, 500mA.
UK
Use a UK Safety Approved AC adapter of DC 2V, minimum 500mA.
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 näe !-symbolin, katso käännettyä turvaohjetta liitteestä 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
Safety Warnings ............................................................................................ iii
Welcome to Allied Telesyn ......................................................................... vii
Where to Find Web-based Guides ................................................................... vii
Document Conventions .................................................................................... vii
Contacting Allied Telesyn Technical Support................................................viii
Online Support ......................................................................................... viii
Telephone or Fax Support........................................................................ viii
E-mail Support ......................................................................................... viii
Returning Products ........................................................................................... ix
FTP Server......................................................................................................... ix
For Sales or Corporate Information .................................................................. x
Tell Us What You Think .................................................................................... x
AT-MC100 Series Fast Ethernet Media Converters ...............................
Key Features....................................................................................................... 2
Status LEDs ................................................................................................ 3
MDI/MDI-X Switch ..................................................................................... 3
Link Test/MissingLink Button ................................................................... 4
Auto-negotiation Switch.............................................................................. 5
External AC/DC Power Adapter................................................................. 6
Network Topologies ............................................................................................ 7
Installing the Media Converter ......................................................................... 8
Planning the Installation............................................................................ 8
Cable Specifications .................................................................................... 8
Verifying the Package Contents ............................................................... 0
Reviewing Safety Precautions .................................................................. 0
Installing the Media Converter ................................................................
Testing the Installation ............................................................................ 3
Warranty Registration ..................................................................................... 5
Technical Specifications................................................................................... 5
Physical Specifications.............................................................................. 5
Agency Certifications ................................................................................ 5
Power Requirements ................................................................................. 6
Port 2 Specifications.................................................................................. 6

vi
Appendix A
Translated Electrical Safety and Emission Information .................... 2
Appendix B
AT-MC100 Series Installation Guide Feedback .................................... 35
Appendix C
Technical Support Fax Order ................................................................... 37
Incident Summary..................................................................................... 37

vii
This guide contains instructions on how to install an AT-MC 00 Series Fast
Ethernet Media Converter.
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/prd_libs.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

viii
Contacting Allied Telesyn Technical Support
There are several ways to contact Allied Telesyn technical support: online,
telephone, fax or e-mail.
Online Support
You can request technical support online by filling out the Technical Support
Form at www.alliedtelesyn.com/forms/support.htm.
Telephone or Fax Support
E-mail Support
United States and Canada
TS @alliedtelesyn.com
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: (+6 ) 2-9438-4966
Japan
Tel: (+8 ) 3-3443-5640
Fax: (+8 ) 3-3443-2443
France
France, Belgium, Luxembourg,
The Netherlands, Middle East, Africa
Tel: (+33) 0- -60-92- 5-25
Fax: (+33) 0- -69-28-37-49
United Kingdom
United Kingdom, Denmark, Norway,
Sweden, Finland
Tel: [phone]
Fax: (+44) -235-442680

AT-MC100 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 know the name of a specific driver that you need for an Allied Telesyn
device, you can download the software by connecting 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
2205 Ringwood Ave
San Jose, CA 95 3
Tel: -800-428-4835, option 4
Fax: -503-639-37 6
European Customer Support Centre
0/ Bridgemead Close
Westmead Industrial Estate
Swindon, Wiltshire SN5 7YT
England
Tel: [phone]
Fax: [phone]
atin America, the Caribbean,
Virgin Islands
Tel: international code + 425-48 -3852
Fax: international code + 425-483-9458
Mexico and Puerto Rico
Tel: -800-424-50 2, ext 3852 or
-800-424-4284, ext 3852
Mexico only:95-800-424-50 2, ext 3852
Fax: international code + 425-489-9 9

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-MC 00 Series
Installation Guide Feedback” on page 35 and return the form to us at the
address or fax number provided. You can also provide feedback online by
filling out the Send Us Feedback Form at www.alliedtelesyn.com/forms/
feedback.htm.
Allied Telesyn International, Corp.
9800 North Creek Parkway, Suite 200
Bothell, WA 980
Tel: [phone]
Fax: [phone]
Allied Telesyn International, Corp.
960 Stewart Drive, Suite B
Sunnyvale, CA 94086
Tel: [phone] (USA and Canada)
Fax: [phone]

1
AT-MC100 Series Fast Ethernet Media
Converters
The AT-MC 00 Series Fast Ethernet Media Converters include the following
models:
The AT-MC 00 Series Fast Ethernet Media Converters are designed to extend
the distance of your network by interconnecting LAN devices that are
physically separated by large distances. Each media converter features a
00Base-TX twisted pair port and a 00Base-FX fiber optic port. The twisted
pair port has an RJ-45 connector and a maximum distance of 00 meters (328
feet). The fiber optic port has an ST or SC connector and a maximum distance
of 2 kilometers ( .2 miles) to 00 kilometers (62 miles), depending on the
model. These units operate at 00 Mbps and feature half-duplex and full-
duplex operation.
The media converters can be installed either as standalone units, such as on a
table, or in an AT-MCR 2 Rackmount Chassis or AT-TRAY4 Rackmount
Tray. The AT-MC 0 , AT-MC 02, and AT-MC 03 Series Media Converters
are easy to install and do not require any software configuration or
management. Figure shows an example of an AT-MC 00 Series Media
Converter.
Figure 1 AT-MC103SC/FS3 Model
❑AT-MC 0 XL ❑AT-MC 03SC/FS3
❑AT-MC 02XL ❑AT-MC 03ST/FS3
❑AT-MC 03XL ❑AT-MC 03SC/FS4
❑AT-MC 03LH ❑AT-MC 03ST/FS4
TX RX
MC103SC/FS3 FAST ETHERNET MEDIA CONVERTER
M/L
ON
LNKTST
CLASS 1
LASER PRODUCT
DO NOT STARE
INTO BEAM
100Base-FX 100Base-TX
SINGLE MODE
FDX
LNK
ACT M/L ON
PWR
LNK
ACT A/N OFF MDI-X
A/N ON MDI

2
Table 1 Maximum Cabling Distances
Key Features
The media converters have the following key features:
❑LEDs for unit and port status
❑MDI/MDI-X button
❑Link Test/MissingLink button for performing a link test and notifies
nodes of connection failures
❑00Base-TX twisted pair port operates in half- or full-duplex mode
❑00Base-FX fiber optic port operates in half- or full-duplex mode
❑External AC/DC power adapter
❑Standard size for use with an AT-MCR 2 chassis or AT-TRAY4 tray
Model
Type of Connector Maximum Distance1
1. Maximum distance may be less depending on the duplex mode of the end stations and the type of fiber optic
cabling used with the port.
Port 1
(100Base-FX)
Port 2
(100Base-TX)
Port 1
(100Base-FX)
Port 2
(100Base-TX)
AT-MC101XL ST RJ-45 2 km (1.2 mi) 100 m (328 ft)
AT-MC102XL SC RJ-45 2 km (1.2 mi) 100 m (328 ft)
AT-MC103XL SC RJ-45 15 km (9.3 mi) 100 m (328 ft)
AT-MC103LH SC RJ-45 40 km
(24.8 mi)
100 m (328 ft)
AT-MC103SC/FS3 SC RJ-45 75 km
(46.5 mi)
100 m (328 ft)
AT-MC103ST/FS3 ST RJ-45 75 km
(46.5 mi)
100 m (328 ft)
AT-MC103SC/FS4 SC RJ-45 100 km
(62 mi)
100 m (328 ft)
AT-MC103ST/FS4 ST RJ-45 100 km
(62 mi)
100 m (328 ft)

AT-MC100 Series Installation Guide
3
Status LEDs
Table 2 defines the system LEDs.
Table 2 Status LEDs
MDI/MDI-X Button
The MDI/MDI-X button, located on the front of the unit, is a straight-through
or crossover cable selection feature. It allows you to connect the RJ-45 port to
a repeater or DTE device without using a special crossover cable. The default
position is MDI-X (OUT), which means you can connect the RJ-45 port to a
workstation or to any other DTE device using a straight-through cable.
LED State Color Description
LNK ON Green A link has been established on the port.
ACT ON Green Data is being received on the port.
FDX ON
OFF
Green Indicates that the unit is operating in full-duplex mode.
Indicates that the unit is operating in half-duplex mode.
PWR ON Green Power is applied.
M/L ON ON
OFF
Green The MissingLink feature is activated on the media
converter.
The MissingLink feature is disabled and the media
converter is operating in the link test mode.

4
Link Test/MissingLink Button
The Link Test/MissingLink button allows you to perform a link test on the
ports on the media converter. This button also allows you to activate the
MissingLink feature on the unit. Both features are describe in the following
section.
Link Test. The link test is a fast and easy way for you to test the connections
between the ports on the media converter and the nodes that are connected to
the ports. If a network problem occurs, you can perform a link test to
determine which port is experiencing a problem, and be able to focus on the
fiber optic cable and node where the problem resides.
A link test is performed when the button is in the LNK TST (OUT) position.
For instructions on performing a link test, refer to “Testing the Installation”
on page 3.
Note
Performing a link test does not interfere with a media converter’s ability
to pass network traffic.
MissingLink. The MissingLink feature enables the fiber optic ports on the
media converter to pass the “Link” status of their connections to each other.
When the media converter detects a problem with one of the ports, such as the
loss of connection to a node, the media converter shuts down the connection to
the other port, thus notifying the node that the connection has been lost.
For example, if the network twisted pair cable to the 00Base-TX port on the
media converter were to fail, the media converter would respond by dropping
the link on the 00Base-FX fiber optic port. In this way, the media converter
notifies the end node connected to the fiber optic port that the connection on
the twisted pair port has been lost. If the failure had started with the fiber
optic cabling, the unit would drop the link to the twisted pair port.
The value to this type of network monitoring and fault notification is that
some hubs and switches can be configured to take a specific action in the event
of the loss of connection on a port. In some cases, the unit can be configured to
seek a redundant path to a disconnected node or send out a trap to a network
management station, and so alert the network administrator of the problem.
Note
The MissingLink feature is disabled when you perform a link test with
the Link Test/MissingLink button. Consequently, to ensure that the
MissingLink feature is activated on the media converter, always set the
button to the M/L ON (IN) position during normal network operations.

AT-MC100 Series Installation Guide
5
Auto-negotiation Button
The auto-negotiation button, located on the front panel, disables the auto-
negotiation feature (IEEE 802.3u) of the media converter. The media
converter uses auto-negotiation to determine the duplex mode of the ports.
The duplex mode refers to the manner in which a node sends and receives
data on the network. Depending on its capabilities, a node can operate in
either half- or full-duplex mode. A node operating in half-duplex can either
send or receive data, but not both at the same time. However, a node
operating in full-duplex can send and receive data simultaneously. The best
network performance is achieved when a node can operate in full-duplex
mode.
In most configurations, you will want to leave the auto-negotiation button
activated so the unit can determine the appropriate duplex mode, based on the
capabilities of the end nodes. For example, the auto-negotiation feature on the
media converter should be left activated in situations where both end nodes
are also capable of auto-negotiation, or where both end nodes have been pre-
set to the same mode or are capable of operating in only one duplex mode, such
as half-duplex.
There is one situation where it may be necessary to disable the auto-
negotiation feature, and that is to prevent a mismatch from occurring between
the duplex modes of the end nodes. For example, Figure 2 shows two units
that have been connected with a media converter. Unit is a repeater that is
capable of operating in half-duplex mode only. Unit 2 is a switch that can
operate in either half- or full-duplex mode, and will auto-negotiation the
duplex mode.
In attempting to auto-negotiate with Unit , the media converter will
determine that the unit is capable of half-duplex only and will set the port
connected to the unit appropriately. In auto-negotiating with Unit 2, the
media converter will determine that the unit can manage full-duplex and will
set the port connected to the unit to full-duplex. The result is a mismatch,
with one unit operating in half-duplex and the other unit operating in
full-duplex. This is referred to as a classic duplex mode mismatch and will
result in poor network performance between the end nodes.
Figure 2 Example of a Duplex Mode Mismatch
TX RX
MC103SC/FS3 FAST ETHERNET MEDIA CONVERTER
M/L
ON
LNKTST
CLASS1
LASERPRODUCT
DONOT STARE
INTOBEAM
100Base-FX 100Base-TX
SINGLE MODE
FDX
LNK
ACT M/L ON
PWR
LNK
ACT A/NOFF MDI-X
A/N ON MDI
Unit 1 Unit
100Base-TX Repeater Media Converter 100Base-TX Switch

6
You can resolve the mismatch in one of two ways:
❑Manually configure Unit 2, if possible, so that the port connected to
the media converter is set to half-duplex.
❑Disable auto-negotiation on the media converter using the auto-
negotiation button. With auto-negotiation on the media converter
disabled, Unit 2 will assume that the converter is capable of only half-
duplex operation, thus eliminating the mismatch in duplex modes
between the end stations.
External AC/DC Power Adapter
An external AC-to-DC power adapter is included with the media converter for
standalone operation (see Figure 3). The power adapter supplies 2 volts DC
to the media converter. Allied Telesyn supplies an approved safety compliant
AC power adapter for the 20 and 240 V AC versions with an unregulated
output of 2 V DC at A. The power required for the media converter is 2 V
DC, 500 mA.
Figure 3 External AC/DC Power Adapter (North American version)

AT-MC100 Series Installation Guide
7
Network Topologies
Figure 4 shows a network configuration where two AT-8224XL switches have
been interconnected with an AT-MC 02XL Media Converter.
Figure 4 Standalone Configuration
Figure 5 shows two media converters in a back-to-back configuration.
Figure 5 Back-to-Back Configuration
TX RX
MC102XL FAST ETHERNET MEDIA CONVERTER
M/L ON
LNKTST
100Base-FX 100Base-TX
FDX
LNK
ACT M/L ON
PWR
LNK
ACT A/N OFF MDI-X
A/N ON MDI
RS-232
TERMINALPORT
STATUS
10BASE-T/100BASE-TX
FASTETHERNETSWITCH
PORTACTI VITY
10BASE-T/ 100BASE-TX
Cable Legend
100 Mbps
100 Mbps (Fiber)
RS-232
TERMINALPORT
STATUS
10BASE-T/ 100BASE-TX
FASTETHERNET SWITCH
PORTACTIVITY
10BASE-T/100BASE-TX
AT-8224XL 100 meters
AT-MC102XL
AT-8224XL with an AT-A17
Expansion Module
2 kilometers
TX RX
MC103SC/FS3 FAST ETHERNET MEDIA CONVERTER
M/L
ON
LNKTST
CLASS1
LASERPRODUCT
DONOT STARE
INTOBEAM
100Base-FX 100Base-TX
SINGLE MODE
FDX
LNK
ACT M/LON
PWR
LNK
ACT A/NOFF MDI-X
A/N ON MDI
TX RX
MC103SC/FS3 FAST ETHERNET MEDIA CONVERTER
M/L
ON
LNKTST
CLASS1
LASERPRODUCT
DONOT STARE
INTOBEAM
100Base-FX 100Base-TX
SINGLE MODE
FDX
LNK
ACT M/LON
PWR
LNK
ACT A/NOFF MDI-X
A/N ON MDI
RS-232
TERMINALPORT
STATUS
10BASE-T/ 100BASE-TX
FASTETHERNET SWITCH
PORTACTIVITY
10BASE-T/100BASE-TX
RS-232
TERMINALPORT
STATUS
10BASE-T/100BASE-TX
FASTETHERNETSWITCH
PORTACTIVITY
10BASE-T/100BASE-TX
Cable Legend
10 Mbps
100 Mbps
100 Mbps (Fiber)
100 meters
100 meters
75 Kilometers
AT-MC103SC/FS3
AT-MC103SC/FS3
AT-8224XL
AT-8224XL

8
Installing the Media Converter
The following section explain how to install the media converter. The media
converter can be installed either as a standalone unit (such as on a table) or in
an AT-MCR 2 chassis or in an AT-TRAY4 tray.
Planning the Installation
Be sure to observe the following guidelines when planning the installation of
your media converter.
❑The nodes connected to the media converter must operate at 00
Mbps.
❑The two nodes connected to the ports of the media converter must
operate with the same duplex mode, either half- or full-duplex. The
media converter itself can operate in either mode.
❑The devices connected to the two ports on the media converter can be
network adapter cards, repeaters, switches, or routers.
❑Be sure to observe the appropriate cabling specifications. Refer to
“Cable Specifications” on page 8.
Cable Specifications
Table 3, Table 4, and Table 5 list the IEEE 802.3u cabling specifications for
the AT-MC 00 Series Media Converters.
Table 3 100Base-TX Twisted Pair Specifications
Cable Type Maximum Distance
Shielded or unshielded Category 5 or better 100 m (328 ft)

AT-MC100 Series Installation Guide
9
Table 4 100Base-FX Fiber Optic Port Specifications (Full-duplex)
Table 5 100Base-FX Fiber Optic Port (Half-duplex)1
1. Thetotal distance of all fiber lengths cannot exceed the limits stated inthe table. Eachmedia converter used inline
within a single collision domain reducesthe overall segment lengthby 40 meters (131 feet).
Model Type of Fiber Optic
Cable
Maximum
Distance
Maximum Allowable
Loss Budget
AT-MC101XL 50/125 or 62.5/125
micron multimode
2 km (1.2 mi) 13 dB at 1310 nm
AT-MC102XL 50/125 or 62.5/125
micron multimode
2 km (1.2 mi) 13 dB at 1310 nm
AT-MC103XL 9/125 micron
single-mode
15 km (9.3 mi) 16 dB at 1310 nm
AT-MC103LH 9/125 micron
single-mode
40 km (24.8 mi) 16 dB at 1310 nm
AT-MC103SC/FS3 9/125 micron
single-mode
75 km (46.5 mi)1
1. The media converter has a minimum operating distance of 15 km (9.4 mi). This is to prevent blinding or
burning out of the optical receiver on the far-end node.
33 dB at 1310 nm
AT-MC103ST/FS3 9/125 micron
single-mode
75 km (46.5 mi)133 dB at 1310 nm
AT-MC103SC/FS4 9/125 micron
single-mode
100 km (62 mi)2
2. The media converter has a minimum operating distance of 40 km (24.8 mi). This is to prevent blinding or
burning out of the optical receiver on the far-end node.
34 dB at 1550 nm
AT-MC103ST/FS4 9/125 micron
single-mode
100 km (62 mi)234 dB at 1550 nm
Number of Media Converters Connected Devices Maximum Distance
One Media Converter Inline Switch to Switch 372 m (1,221 ft)
Workstation to Switch 372 m (1,221 ft)
Switch to Class I Repeater 137 m (450 ft)
Switch to Class II Repeater 185 m (607 ft)
Two Media Converters Inline Switch to Switch 332 m (1,089 ft)
Workstation to Switch 332 m (1,089 ft)
Switch to Class I Repeater 97 m (318 ft)
Switch to Class II Repeater 145 m (476 ft)

10
Verifying the Package Contents
Make sure the following items are included in your media converter package.
If any of the following items are missing or damaged, contact your sales
representative.
❑One AT-MC 00 Series Fast Ethernet Media Converter
❑Four protective feet (for standalone use only)
❑External AC/DC power adapter
❑This installation guide
❑Warranty card
Reviewing Safety Precautions
Please review the following safety precautions before you begin to install the
media converter.
Warning
Class laser product. ! 6
Warning
Do not stare into the laser beam. ! 7
Warning
ightning Danger: Do not work on equipment or cables during periods
of lightening activity. ! 8
Caution
Do not block air vents. ! 9
Caution
Power to the hub must be sourced only from the adapter. ! 10
Caution
Operating Temperature: This product is designed for a maximum
ambient temperature of 40°C. ! 11
Caution
All Countries: Install this product in accordance with local and
National Electric Codes. ! 12