Allied Telesis AT-LMC100SC User manual

AT-LMC100SC
AT-LMC100ST
Fast Ethernet Media Converters
Installation Guide
PN 613-50452-00 Rev B

Copyright © 2004 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.
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, 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.

iii
Electrical Safety and Emission Compliance
Standards: This product meets the following standards.
U.S. Federal Communications Commission
Declaration Of Conformity
Manufacturer Name: Allied Telesyn, Inc.
Manufacturer Address: 960 Stewart Drive, Suite B
Sunnyvale, CA 94085 USA
Manufacturer Telephone: [phone]
Declares that the Product: Fast Ethernet Media Converters
Model Numbers: AT-LMC100SC
AT-LMC100ST
This product complies with FCC Part 15B, Class B Limits:
This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) 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 15 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 100 Mbps RJ-45 connections, and Category 5 shielded
twisted-pair for all 100 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.

Electrical Safety and Emission Compliance
iv
RFI Emission EN55022 Class B 1
Immunity EN55024 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 (TUV), UL1950, (cULus)4
Laser 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 12V, 500mA.
Europe - EU
Use TÜV licensed AC adapter of DC 12V, 500mA.
UK
Use a UK Safety Approved AC adapter of DC 12V, 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 näet -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.
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.

v
AT-LMC100SC and AT-LMC100ST Installation Guide
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.

vii
Table of Contents
Electrical Safety and Emission Compliance............................................iii
Table of Contents ..........................................................................................vii
Welcome to Allied Telesyn ........................................................................... ix
Where to Find Web-based Guides ....................................................................ix
Document Conventions ..................................................................................... ix
Contacting Allied Telesyn .................................................................................. x
Online Support ............................................................................................ x
E-mail and Telephone Support................................................................... x
Returning Products ..................................................................................... x
For Sales or Corporate Information ........................................................... x
Chapter 1
Overview ........................................................................................................... 1
Key Features....................................................................................................... 3
Status LEDs ................................................................................................ 3
MDI/MDI-X Selector Switch ....................................................................... 3
External AC/DC Power Adapter................................................................. 4
Network Topologies ............................................................................................ 5
Standalone Topology ................................................................................... 5
Back-to-Back Topology................................................................................ 6
Chapter 2
Installing the Media Converter ................................................................... 7
Verifying the Package Contents ........................................................................ 7
Planning the Installation ................................................................................... 7
Reviewing Safety Precautions ........................................................................... 8
Installing the Media Converter ......................................................................... 9
Warranty Registration ..................................................................................... 11
Chapter 3
Troubleshooting ............................................................................................ 13
Troubleshooting Guidelines ............................................................................. 13
Loopback Test ................................................................................................... 15

viii
Appendix A
Technical Specifications .............................................................................17
Physical .............................................................................................................17
Environmental ..................................................................................................17
Electrical Rating ...............................................................................................17
Agency Certifications........................................................................................17
Fiber Optic Port Specifications ........................................................................18
Appendix B
Translated Electrical Safety and Emission Information.....................21

ix
This guide contains instructions on how to install an AT-LMC100SC or an
AT-LMC100ST Fast Ethernet Media Converter.
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 provide additional information.
Caution
Cautions indicate that performing or omitting a specific action may
result in equipment damage or loss of data.
Warning
Warnings indicate that performing or omitting a specific action may
result in bodily injury.
Welcome to Allied Telesyn

Welcome to Allied Telesyn
x
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.
E-mail and Telephone Support
For Technical Support via E-mail or telephone, refer to the Support & Services
section of the Allied Telesyn web site: http://www.alliedtelesyn.com.
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 a RMA number, contact Allied Telesyn’s Technical Support at our
web site: http://www.alliedtelesyn.com.
For Sales or Corporate Information
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” then “Worldwide Contacts.”

1
Chapter 1
Overview
The AT-LMC100 Series Ethernet Media Converters include the following
models:
❑AT-LMC100SC
❑AT-LMC100ST
The AT-LMC100 Series Ethernet Media Converters are designed to extend
the distance of your network by interconnecting LAN devices that are
physically separated by long distances. These media converters have the
functionality to connect any managed/unmanaged 100Mbps switch or hub
using standard 100Base-TX RJ-45 connections and convert the signal to
100Base-FX fiber.
Each AT-LMC100 Series media converter features a 100Base-TX twisted pair
port and a 100Base-FX fiber optic port. The twisted pair port has an RJ-45
connector and a maximum operating distance of 100 meters (328 feet). The
fiber optic port has a multi-mode ST or SC connector and a maximum
operating distance of 2 kilometers (1.2 miles). These units operate at 100
Mbps and feature half- and full-duplex operation.
The media converters can be installed on a desktop or in an AT-MCR12
chassis. The AT-LMC100 Series Media Converters are easy to install and do
not require any software configuration or management. Figure 1 and Figure 2
display the front panel of the AT-LMC100 Series Media Converters.
Figure 1 AT-LMC100SC Model Converter - Front Panel
TX RX
AT-LMC100SC FAST ETHERNET MEDIA CONVERTER
CLASS 1
LASER PRODUCT
DO NOT STARE
INTO BEAM
100Base-FX 100Base-TX
PWR
LNK
ACT
LNK
ACT
MDI-X
MDI

Overview
2
Figure 2 AT-LMC100ST Converter - Front Panel
Figure 3 displays the rear panel of the AT-LMC100 Series Media Converters.
Figure 3 AT-LMC100 Series Converters - Rear Panel
Table 1 lists the maximum operating distances for the media converters.
Table 1 Maximum Operating Distances
Model Type of Connector Maximum Operating Distance
100Base-FX 100Base-TX 100Base-FX 100Base-TX
AT-LMC100SC Multi-mode SC RJ-45 2 km
(1.24 mi)
100 m (328 ft)
AT-LMC100ST Multi-mode ST RJ-45 2 km
(1.24 mi)
100 m (328 ft)
TX RX
AT-LMC100ST FAST ETHERNET MEDIA CONVERTER
CLASS 1
LASER PRODUCT
DO NOT STARE
INTO BEAM
100Base-FX 100Base-TX
PWR
LNK
ACT
LNK
ACT
MDI-X
MDI
12 V D C

AT-LMC100SC and AT-LMC100ST Installation Guide
3
Key Features
The media converters have the following key features:
❑LEDs for unit and port status
❑MDI/MDI-X selector switch on RJ-45 port
❑Automatic half- or full-duplex mode operation with 100Base-TX or
100Base-FX fiber optic port
❑Maximum transmission distance of fiber connection is 2 kilometers at
full-duplex mode
❑External AC/DC power adapter
❑Standard size for use in an AT-MCR12 chassis
Status LEDs
Table 2 defines the media converter’s LEDs.
Table 2 Status LEDs
MDI/MDI-X Selector Switch
An RJ-45 port on a 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 100 Mbps network devices together that have dissimilar port
wiring configurations, such as MDI to MDI-X, you use a straight-through
cable. To connect two network devices that have an RJ-45 port with the same
wiring configuration, such as MDI to MDI, you use a crossover cable.
The RJ-45 port on the media converter features an MDI/MDI-X switch. You
can use this switch to configure the twisted pair port on the media converter
as either MDI or MDI-X. This feature allows you to use a straight-through
cable regardless of the type of end-node connected to the port.
LED State Color Description
PWR ON Green Power is applied to the media converter.
ACT ON Green Activities are received and/or transmitted on the port.
LNK ON Green A link has been established on the port.

Overview
4
Note
After using the MDI/MDI-X switch to change between the two settings,
you must reset the media converter by powering OFF then powering ON
the unit.
External AC/DC Power Adapter
An external AC/DC power adapter is included with the media converter for
standalone operation. The power adapter supplies 12VDC to the media
converter. Allied Telesyn supplies an approved safety compliant AC power
adapter for the 120 or 240V AC versions with an unregulated output of
12VDC at 1 A. The power required for the media converter is 12VDC, 500 mA.

AT-LMC100SC and AT-LMC100ST Installation Guide
5
Network Topologies
The AT-LMC100 Series Media Converters can be used in two different types
of topologies: standalone and back-to-back. Both topologies are described
below.
Standalone Topology
Figure 4 illustrates a standalone topology where two AT-8224XL switches
have been interconnected with an AT-LMC100SC media converter.
Figure 4 Standalone Topology
TX RX
AT-LMC100SC FAST ETHERNET MEDIA CONVERTER
CLASS 1
LASER PRODUCT
DO NOTSTARE
INTOBEAM
100Base-FX 100Base-TX
PWR
LNK
ACT
LNK
ACT
MDI-X
MDI
RS-232
TERMINALPORT
STATUS
10BASE-T/ 100BASE-TX
FASTETHERNETSWITCH
PORTACTIVITY
10BASE-T/ 100BASE-TX
Cable Legend
100 Mbps
100 Mbps (Fiber)
RS-232
TERMINALPORT
STATUS
10BASE-T/100BASE-TX
FASTETHERNETSWITCH
PORTACTIVITY
10BASE-T/ 100BASE-TX
AT-8224XL
100 m (32.8 ft)
AT-LMC100SC
AT-8224XL with a 100 Mbps
Expansion Module
2 km (1.2 mi)

Back-to-Back Topology
Figure 5 illustrates two media converters in a back-to-back configuration.
Figure 5 Back-to-Back Topology
TX RX
AT-LMC100SC FAST ETHERNET MEDIA CONVERTER
CLASS1
LASERPRODUCT
DONOT STARE
INTOBEAM
100Base-FX 100Base-TX
PWR
LNK
ACT
LNK
ACT
MDI-X
MDI
TX RX
AT-LMC100SC FAST ETHERNET MEDIA CONVERTER
CLASS1
LASERPRODUCT
DONOT STARE
INTOBEAM
100Base-FX 100Base-TX
PWR
LNK
ACT
LNK
ACT
MDI-X
MDI
RS-232
TERMINALPORT
STATUS
10BASE-T/100BASE-TX
FASTETHERNETSWITCH
PORTACTIVITY
10BASE-T/100BASE-TX
RS-232
TERMINALPORT
STATUS
10BASE-T/100BASE-TX
FASTETHERNETSWITCH
PORTACTIVITY
10BASE-T/100BASE-TX
Cable Legend
100 Mbps
100 Mbps (Fiber)
100 m (328 ft)
100 m (328 ft)
AT-LMC100SC
AT-LMC100SC
AT-8224XL
AT-8224XL
2 km (1.2 mi)

7
Chapter 2
Installing the Media Converter
Verifying the 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-LMC100SC or AT-LMC100ST Fast Ethernet Media
Converter
❑Four protective feet (for desktop use only)
❑An external AC/DC power adapter
❑This installation guide
❑Warranty card
Planning the Installation
Be sure to observe the following guidelines when planning the installation of
your media converter.
❑The end-nodes connected to the media converter must operate at 100
Mbps.
❑The two end-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
a network adapter card, repeater, switch, or router.
❑Refer to Table 3 and Table 4 for the twisted pair and fiber optic port
specifications.
Table 3 100Base-TX Twisted Pair Port Cabling Specifications
Cable Type Maximum Operating Distance
Shielded Category 5 or better 100 m (328 ft.)

Installing the Media Converter
8
Table 4 100Base-FX Fiber Optic Port Specifications (Full-duplex)
Reviewing Safety Precautions
Please review the following safety guidelines before installing the media
converter.
Warning
Class 1 laser product. 6
Warning
Do not stare into the laser beam. 7
Warning
Lightning Danger: Do not work on equipment or cables during periods
of lightening activity. 8
Caution
Do not block air vents. 9
Caution
Power to this product 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
Model Type of Fiber Optic
Cable
Maximum
Operating
Distance
Maximum Allowable
Loss Budget
AT-LMC100SC
and
AT-LMC100ST
50/125 micron MMF 2 km (1.2 mi) 13 dB at 1310 nm
62.5/125 micron MMF 2 km (1.2 mi) 13 dB at 1310 nm

AT-LMC100SC and AT-LMC100ST Installation Guide
9
Installing the Media Converter
The following procedure explains how to install an AT-LMC100SC or an
AT-LMC100ST Media Converter.
To install the media converter, perform the following procedure:
1. Remove all equipment from the package and store the packaging material
in a safe place.
Note
Do not remove the dust cover from the fiber optic port until you are
ready to connect the fiber optic cable. Dust contamination can adversely
impact the operating performance of the port on the media converter.
2. If you are installing the media converter in an AT-MCR12 chassis, refer to
the chassis’s installation guide for instructions on how to install the unit,
then proceed to Step 5.
3. Place the media converter on a flat, secure surface (such as a desk or
table) leaving ample space around the unit for ventilation.
4. Attach the four protective rubber feet to the bottom of the media
converter. See Figure 6. Do not attach the protective feet if you are
installing the unit in an AT-MCR12 chassis.
Figure 6 Attaching the Protective Feet
5. Plug the AC/DC power adapter into an appropriate AC power outlet and
insert the power plug into the DC receptacle located on the back of the
unit. Refer to Figure 7 on page 10.
Note
This step does not apply if you installed the unit in an AT-MCR12 chassis.
TX RX
AT-LMC100SC FAST ETHERNET MEDIA CONVERTER
CLASS 1
LASER PRODUCT
DO NOT STARE
INTO BEAM
100Base-FX 100Base-TX
PWR
LNK
ACT
LNK
ACT
MDI-X
MDI

Installing the Media Converter
10
Figure 7 12VDC Connector on Rear Panel
6. Verify that the PWR LED is green. If the LED is OFF, refer to
“Troubleshooting” on page 13.
7. Remove the dust cover from the fiber optic connector and connect the
cable to the fiber optic port. Verify that the media converter’s transmitter
port (TX) is connected to the end-node’s receiver port (RX) and that the
media converter’s receiver port (RX) is connected to the end-node’s
transmitter port (TX).
8. Connect the twisted pair cable to the twisted pair port.
Note
End-nodes connected to the media converter must operate with the
same duplex mode, either both full-duplex or both half-duplex.
9. Set the MDI/MDI-X switch as follows:
❑If you are connecting a workstation to the 100Base-TX port, set the
MDI/MDI-X switch to the MDI-X position. MDI-X is the default
position.
❑If you are connecting a hub or a switch to the 100Base-TX port, set the
MDI/MDI-X switch to the MDI position.
Note
After using the MDI/MDI-X switch to change between the two settings,
you must reset the media converter by powering OFF then powering ON
the unit.
10. Power ON the end-nodes.
The media converter is now ready for use.
12 V D C
Power Plug
DC Receptacle
AC/DC Power Adapter Back of Media Converter
DC Polarity Symbols