Black Box LE1345A-R3 Operation manual

TX RX MM
PWR
100BASE-SX 100BASE-TX
LKAT LKAT
TX RX MM
PWR
100BASE-SX 100BASE-TX
LK
AT LKAT
TX RX MM
PWR
100BASE-FX 100BASE-TX
LKAT LKAT
TX RX MM
PWR
100BASE-FX 100BASE-TX
LK
AT LKAT
TX RX SM
PWR
100BASE-FX 100BASE-TX
LKAT LKAT
TX RX SM
PWR
100BASE-FX 100BASE-TX
LK
AT LKAT
TX RX SM (LH)
PWR
100BASE-FX 100BASE-TX
LKAT LKAT
Installation & User Guide
“twister”™
100MBPS TX-TO-FX
MEDIA CONVERTERS
JULY 1999
LE1345A-R3
LE1345A-ST-R3
LE1346A-R3
LE1345A-ST-R3
LE1346A-4OKM-R2
LE1345A-SX-R3
LE1345A-SXST-R3
Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone]
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]
CUSTOMER
SUPPORT
INFORMATION

© 1999 Black Box Corporation All rights reserved. Printed in USA.
Black Box and the Black Box logo are registered trademarks of Black Box Corporation.
All other trademarks appearing in this manual are the property of their owners.
This publication is protected by the copyright laws of the United States and other countries, with
all rights reserved. No part of this publication may be reproduced, stored in a retrieval system,
translated, transcribed, or transmitted, in any form, or by any means manual, electric, electronic,
electromagnetic, mechanical, chemical, optical or otherwise, without prior explicit written
permission of Black Box Corporation.
The information contained in this document is assumed to be correct and current. The
manufacturer is not responsible for errors or omissions and reserves the right to change
specifications at any time without notice.

Table of Contents
“twister” 100Mbps Media Converter Installation & User Guide
Introduction ...............................................................................................4
Overview ....................................................................................................5
Installation Guide ......................................................................................6
STEP 1: Unpacking the “twister” and Accessories ....................6
STEP 2: Choosing an Appropriate Location .............................. 6
STEP 3: Setting the Switches .....................................................7
STEP 4: Connecting to the Network .......................................... 9
STEP 5: Applying Power ......................................................... 11
User Guide ...............................................................................................13
System LEDs............................................................................13
Link Loss Carry Forward (LLCF)............................................15
Topology Solutions ..................................................................16
Technical Specifications ...........................................................18
Product Safety, EMC and Compliance Statements .................. 20

4
Introduction
Thank you for choosing “twister” media converters.
The “twister” media converters represent the hottest technology available
for extending Ethernet and Fast Ethernet networks. “twister” media
conversion has become a standard for providing a cost-effective means of
integrating a mixed media environment. As LANs grow and evolve, this
technology provides an ideal solution for building effective migration
strategies.
These IEEE 802.3u compliant media converters are compatible with Fast
Ethernet devices from other leading network technology providers. This
increases the flexibility of your network configuration by ensuring reliable
data transmission in multi-vendor as well as mixed media environments.
The information in this guide will help you to install and start using your
“twister” media converter.

“twister” Media Converter 5
Overview
The “twister” 100Mbps TX-to-FX media converters provide seamless
high-speed integration of 100BASE-TX twisted-pair and 100BASE-FX
fiber optic segments in Fast Ethernet environments. The “twister”
supports remote fiber optic links up to 2km over multimode and up to
40km over singlemode fiber optic cable.
To optimize your Fast Ethernet network, this innovative media converter
provides seamless operation in half-duplex or full-duplex environments.
Full signal restoration —with a low bit delay — ensures accurate data
transmission to and from LANs within an organization. All signal activity
is completely converted ensuring accurate communication and collision
detection in connected segments and allowing maximum media length to
be achieved on either side of the device.
The “twister” provides the following key features:
• A Link Loss Carry Forward (LLCF) enable/disable switch is
included to provide an easy means for troubleshooting a
remote network connection. Refer to the section of this guide
titled Link Loss Carry Forward for more information.
• All twisted-pair ports are equipped with an MDI-II to MDI-X
switch eliminating the need for crossover cables.
• Auto polarity support on all twisted-pair ports.
Whether you are updating or expanding your existing network, the line of
“twister” media converters supports a wide range of configuration needs.
The “twister” includes the following media conversion combinations:
LE1345A-R3 __________ TX to FX multimode SC
LE1346A-ST-R3 _______ TX to FX singlemode ST
LE1345A-ST-R3 _______ TX to FX multimode ST
LE1346A-R3 __________ TX to FX singlemode SC
LE1346A-40KM-R2 ____ TX to FX singlemode SC (40km)
LE1345A-SX-R3 _______ TX to SX multimode SC
LE1345A-SXST-R3 _____ TX to SX multimode ST

6 Installation Guide
2
Installation Guide
Follow the simple steps outlined in this section of the guide to
install and start using your “twister” media converter.
Unpack the “twister” media converter and
any accessories.
Check that the following components have been included with
your order:
• “twister” media converter
• Power Supply
• Power Cord
• Four (4) Rubber Feet
Your order has been provided with the safest possible packaging,
but shipping damage does occasionally occur. Inspect your order
carefully. If you discover any shipping damage, notify the carrier
and follow their instructions for damage and claims. Save the
original shipping carton in case return or storage of the unit is
necessary.
Choose an appropriate location.
The “twister” media converter is intended for use in either office
or industrial environments. The unit must be located within six (6)
feet of the AC power source being used and placed as far away as
possible from electrical noise generating equipment such as
copiers, electrostatic printers and other motorized equipment. If
exposed twisted-pair wiring is used nearby, the wiring should be
routed as far away as possible from power cords and data cables
to minimize interference.
The units may be oriented in any manner which permits the user
to make physical connection to the power supply and leaves a
minimum of six (6) inches of space for proper ventilation.
TUV Compliance Note. For pluggable equipment, the socket outlet
must be installed near the equipment and be easily accessible.
Bei Geräten mit Steckanschluß muß die Steckdose nahe dem Gerät
angebracht und leicht zugänglich sein.
1

“twister” Media Converter 7
Set the Switches.
Link Loss Carry Forward (LLCF) Switch.
The media converter incorporates Link Loss Carry Forward
(LLCF) functionality as an aid in troubleshooting a remote
connection.
A switch for enabling/disabling LLCF is located on the rear
panel of the converter. When LLCF is enabled, the FX ports as
well as the TX ports on the “twister” do not transmit a link
signal until they receive a link signal from the opposite port.
Refer to the page titled Link Loss Carry Forward in the User
Guide section of this manual for more detailed information.
The unit is shipped with the LLCF disabled. To re-set the LLCF,
simply slide the switch to the appropriate setting.
3
PWR
OFF ON
DC INPUT/5VDCLLCF
LLCF Switch
(default is OFF)

8 Installation Guide
MDI-II to MDI-X Switch.
All “twister” media converters with twisted-pair ports have an
MDI-II to MDI-X switch that eliminates the need for crossover
cables. This switch is located on the bottom of the unit directly
below the RJ-45 connector and allows simple setup in either
straight through or crossover configurations. Refer to the
illustration below.
When setting the MDI-II to MDI-X switch, observe the
positioning of the following symbols:
• the parallel symbol (II) indicates a straight through or
parallel connection.
• the cross symbol (X) indicates a crossover connection.
These symbols are clearly marked on the bottom of the unit.
Using a pointed object, simply slide the switch in the direction
of the appropriate symbol. Use the following table as a guide:
TX RX SM
PWR
100BASE-FX 100BASE-TX
LK
AT LKAT
MDI-II / MDI-X Switch
A device that is wired straight through, needs a crossover connection:
If the cable is…
straight through
crossover
… the MDI-II to MDI-X Switch Setting should be
X
II
A device that is wired crossover, needs a parallel connection:
If the cable is…
straight through
crossover
… the MDI-II to MDI-X Switch Setting should be
II
X

“twister” Media Converter 9
Connect to the network.
The “twister” media converter offers the ease of plug-and-play
installation.
Each “twister” media converter provides one shielded
RJ-45 connector and supports a maximum segment length of
100 meters for Category 5 Twisted-pair.
The “twister” also comes with the following connectors:
• the LE1345A-R3 and LE1345A-ST-R3 provide one set of FX
multimode SC/ST connectors and support a maximum
segment length of up to 2km for remote links.
• LE1346A-R3 provides one set of FX singlemode SC
connectors and supports a maximum segment length of up to
15km for remote links.
• the LE1346A-40KM-R2 provides one set of FX singlemode SC
connectors and supports a maximum segment length of up to
40km for remote links.
• the LE1346A-ST-R3 provides one set of FX singlemode ST
connectors and supports a maximum segment length of up to
15km for remote links
• the LE1345A-SX-R3 and LE1345A-SXST-R3 provide one set
of SX multimode SC or ST connectors respectively.
When making fiber optic connections, be sure that the transmit
(TX) port of the “twister” connects to the receive (RX) port
of the connected device; and be sure that the transmit (TX) port
of the connected device connects to the receive (RX) port of the
“twister” unit.
Once power is applied to the unit, correct connectivity can be
verified via the LK (Link) LED.
4

10 Installation Guide
TX RX SM
PWR
100BASE-FX 100BASE-TX
LKAT LKAT
TX RX SM
PWR
100BASE-FX 100BASE-TX
LK
AT LKAT