Black Box LE7404A, LE7412A-DC, LE7408A, LE7412A, LE740-TPSTM-R2 Installation Manual

16

1

About Media Converters

The modular Media Converter Series includes
modules that convert copper to single-mode,
multi-mode or single-strand fiber at Ethernet, Fast
Ethernet and Gigabit Ethernet speeds, and mod­ules that convert copper to thin coax at Ethernet
speeds. Modules install in a variety of chassis.

Media Converter Chassis

Media Converter

chassis provide power to the media conversion modules.

•

1-PPort

(LE7401A-R2) chassis include one media conversion module slot.

•

4-PPort

(LE7404A) chassis include four media conversion module slots.

•

8-PPort

(LE7408A) chassis is a 1U high rackmountable that includes eight
media conversion module slots.
The 1, 4 and 8 slot chassis include a fixed 100/240 VAC power supply.

•

12-PPort

chassis is rackmountable and includes 12 media conversion module
slots and either a 100/240 VAC (LE74012A) or -48 VDC (LE74012A-DC)
power supply. The 12-Slot chassis is 1U high and has the power on the rear
of the chassis with media conversion module slots on the front.

10Mbps Media Conversion Modules

10Mbps Media Conversion Modules provide a single conversion between
10Base-T twisted pair and either 10Base-FL fiber or 10Base-2 coax. Each module
requires one slot in a Media Converter chassis. The following versions are available:

LE740-TPSTM-R2 TP/FO-MM850-ST 4 Km
LE740-TPSTM-SC-R2 TP/FO-MM850-SC 4 Km
LE740-TPSTS20-R2 TP/FO-SM1310/PLUS-ST 40 Km
LE740-TPSCS20-R2 TP/FO-SM1310/PLUS-SC 40 Km

LE740-TPBNC TP/BNC

NOTE: All modules support half- and full-duplex except modules with BNC connectors are always HDX.

NOTE

This manual will refer to all types of modules as “Media

Conversion Modules” except where differences require indi­catation.

QUICK START

Introduction 1
Board Diagrams 3
Jumper Settings 4
Crossover/Pass-Through 5
LinkLoss & FiberAlert 6
Auto-Negotiation 8
Installation of Modules 9
LED Operation 11
Technical Support 11

Modular Media Converter

Installation Guide

(includes cchassis pplus 110 MMbps, 1100 MMbps, 11000 MMbps EEthernet

and 110/100 SSwitching EEthernet MMedia CConversion MModules

LE7401A-R2
LE7404A
LE7408A
LE7412A
LE7412A-DC
LE740-TPSTM-R2
LE740-TPSTM-SC-R2

LE740-TPSTS20-R2
LE740-TPSCS20-R2
LE740-TPBNC
LH740-TPSTM-R2
LH740-TPSCM-R2
LH742-TPSTM-SX
LH740-TPSTS20-R2

LH740-TPSCS20-R2
LH741-TPSTSXM
LH741-TPSCSXM
LH741-TPSTM
LH741-TPSCM
LH741-TPSM
LH741-TPSCS13/15

LH741-TPSCS15/13
LH741-TPSCS13/1540
LH741-TPSCS15/1340
LG741-TXSXSC
LG741-TXLXSC
LG741-TXLXSC40
LG741-TXLXSC70

LG741-TXLXSC-13
LG741-TXLXSC-15
LG741-TXLXSC-1340
LG741-TXLXSC-1540

1000 Park Drive • Lawrence, PA 15055-1018 USA

TEL: [phone] • FAX: [phone]

[e-mail] • www.blackbox.com

© 1992-2005 Black Box Corp. All rights reserved.

The information in this document is subject to change without notice. Black Box assumes no responsibility for any errors that may
appear in this document. All product names are trademarks of the manufacturer. Specific brands and product names may be trade­marks and are the property of their respective companies.

Document Number 51-80780BB-02 A0 October 2005

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About 100Mbps Media Conversion Modules

100Mbps Media Conversion Modules provide a single conversion between
100Base-TX twisted pair and 100Base-FX or SX fiber. Each module requires one
slot in a Media Converter chassis. The following versions are available:

LH740-TPSTM-R2 TX/FX-MM1300-ST 2 Km
LH740-TPSCM-R2 TX/FX-MM1300-SC 2 Km
LH742-TPSTM-SX TX/SX-MM850-ST 300 m
LH740-TPSTS20-R2 TX/FX-SM1310/PLUS-ST 40 Km
LH740-TPSCS20-R2 TX/FX-SM1310/PLUS-SC 40 Km

NOTE: All modules support half- and full-duplex.

10/100 Mbps Switching Media Conversion Modules

The auto-negotiating, 10/100 switching media converter offers plug-and-play
operation, converting 10Base-T or 100Base-TX, Half- or Full-Duplex twisted pair to
100Base-FX, Full-Duplex fiber. This module protects against Broadcast storms, and
allows jumbo packets of up to 1916 bytes. The following versions are available:

LH741-TPSTSXM TP-TX/FX-MM850-ST 300 m
LH741-TPSCSXM TP-TX/FX-MM850-SC 300 m
LH741-TPSTM TP-TX/FX-MM1300-ST 2 Km
LH741-TPSCM TP-TX/FX-MM1300-SC 2 Km
LH741-TPSM TP-TX/FX-SM1310/PLUS-SC 40 Km
LH741-TPSCS13/15 TP-TX/SSFX-SM1310-SC 20 Km
LH741-TPSCS15/13 TP-TX/SSFX-SM1550-SC 20 Km
LH741-TPSCS13/1540 TP-TX/SSFX-SM1310/PLUS-SC 40 Km

LH741-TPSCS15/1340 TP-TX/SSFX-SM1550/PLUS-SC 40 Km

1000Mbps Media Conversion Modules

1000Mbps Media Conversion Modules provides a single-conversion
between 1000Base-T twisted pair and 1000Base-LX or SX fiber. These mod­ules offer plug-and-play operation, and always operates at Full-Duplex.
Each Gigabit module requires one slot in a MediaConverter chassis.

LG741-TXSXSC TX/SX-MM850-SC 300 m

LG741-TXLXSC TX/LX-SM1310-SC 10 Km

LG741-TXLXSC40 TX/LX-SM1310/PLUS-SC 40 Km

LG741-TXLXSC70 TX/LX-SM1550/LONG-SC 70 Km

LG741-TXLXSC-13 TX/SSLX-SM1310-SC 10 Km

LG741-TXLXSC-15 TX/SSLX-SM1550-SC 10 Km

LG741-TXLXSC-1340 TX/SSLX-SM1310/PLUS-SC 40 Km

LG741-TXLXSC-1540 TX/SSLX-SM1550/PLUS-SC 40 Km

Configuring Media Conversion Modules

Before installing, you can configure 10Mbps and 100Mbps Modules for
a variety of features (see diagrams/chart on page 3-4 for specific informa­tion). 10/100 Switching and Gigabit Modules have plug-and-play operation
and require no configuration.

F EDERAL

C OMMUNICATIONS C OMMISSION R ADIO F REQUENCY

I NTERFERENCE

S TATEMENT

This equipment has been tested and found to comply with the limits for a Class A com­puting device, pursuant to Part 15 of the 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 the 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 the user will be required to correct the
interference at his own expense.

Any changes or modifications not expressly approved by the manufacturer could void the
user's authority to operate the equipment.

The use of non-shielded I/O cables may not guarantee compliance with FCC RFI limits.

This digital apparatus does not exceed the Class A limits for radio noise emission from
digital apparatus set out in the Radio Interference Regulation of the Canadian Department of
Communications.

Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de classe B prescrites dans le Règlement sur le brouil­lage radioélectrique publié par le ministère des Communications du Canada.

14

3

2) Black Box installs dust caps to ensure factory-clean optical devices. These protective
caps should not be removed until the moment of connecting the fiber cable to the
device. Assure that the fiber is properly terminated, polished and free of any dust or
dirt and that the location is as free from dust and dirt as possible.

3) Store spare caps in a dust free environment such as a sealed plastic bag or box so
that when reinstalled they do not introduce any contamination to the optics.

4) Should it be necessary to disconnect the fiber device, reinstall the protective dust
caps.

5) If you suspect that the optics have been contaminated, alternate between blasting
with clean dry compressed air and flushing with methanol to remove particles of

dirt.

E LECTROSTATIC D

ISCHARGE P RECAUTIONS

Electrostatic discharge (ESD) can cause damage to your add-in modules. Always observe the

following precautions when installing or handling an add-in module or any board assembly

.

1) Do not remove unit from its protective packaging until you’re ready to install it.

2) Wear an ESD wrist grounding strap before handling any module or component. If
you do not have a wrist strap, maintain grounded contact with the system unit
throughout any procedure requiring ESD protection.

WARNING! Integrated circuits and fiber optic components are extremely suscepti­ble to electrostatic discharge damage. Do
not handle these components directly unless you are a qualified service technician
and use tools and techniques that conform to accepted industry practices.

3) Hold boards by the edges only; do not touch the electronic components or gold
connectors.

4) After removal, always place the boards on a grounded, static-free surface, ESD pad
or in a proper ESD bag. Do not slide the board over any surface

.

S

AFETY C ERTIFICATIONS

UULL//CCUULL::

Listed to Safety of Information Technology Equipment, Including Electrical Business Equipment.

CCEE::

The products described herein comply with the Council Directive on Electromagnetic
Compatibility (89/336/EEC) and the Council Directive on Electrical Equipment Designed for use
within Certain Voltage Limits (73/23/EEC). Certified to Safety of Information Technology
Equipment, Including Electrical Business Equipment. For further details, contact Black Box.

Class 1 Laser product, Luokan 1 Laserlaite,
Laser Klasse 1, Appareil A’Laser de Classe 1

B OARD D IAGRAMS AND J UMPER/SWITCH S ETTINGS

NOTE

To determine which board diagram (-20, -40, -50, etc.) matches your module, compare the jumper
locations with the diagrams found above. 10/100 Switching modules and Gigabit modules do not
require any configuration, therefore the boards for those modules are not shown above.

General Information

Black Box Customer Service

Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)

FREE technical support, 24 hours a day, 7 days a week:

Call: 724-746-5500
Fax: [phone]
Mail order: Black Box Corporation, 1000 Park Drive

Lawrence, PA 15055-1018

Web site: www.blackbox.cox

E-mail: [e-mail]

S PECIFICATIONS

Environmental

Operating Temperature*:

32° to 122°F (0° to +50°C); 5% to 90% (non-condensing), 0 – 10,000 ft. altitude

Storage Temperature*:

-13° to +158°F (-25° to +70°C); 5 to 90% (non-condensing)

*Some products may support lower operating and storage temperatures.

Electrical

1-Port Media Converter

AC Input Load: 100/240 100-240VAC ±10% , 50/60Hz, 0.1/0.05A 0.3A
Maximum Heat Generated: 51 BTU/hour

4-Port Media Converter

AC Input Load: 100/240 100-240VAC ±10% , 50/60Hz, 0.1/0.05A 1.2A
Maximum Heat Generated: 67 BTU/hour

8-Port Media Converter

AC Input Load: 100/240 100-240VAC ±10% , 50/60Hz, 0.5/0.2A 1.2A
Maximum Heat Generated: 137 BTU/hour

12-Port Media Converter

AC Input Load: 100/240 100-240VAC ±10% , 50/60Hz, 0.5/0.2A 1.2A
DC Input Load: -48 ±10% VDC, 1A
Maximum Heat Generated: 137 BTU/hour for AC unit

171 BTU/hour for DC unit

F IBER O PTIC C LEANING G UIDELINES

Fiber optic transmitters and receivers are extremely susceptible to contamination by parti­cles of dirt or dust which can obstruct the optic path and cause performance degradation.
Good system performance requires clean optics and connector ferrules.

1) Use fiber patch cords (or connectors, if you terminate your own fiber) only from a
reputable supplier; low quality components can cause many hard-to-diagnose prob­lems in an installation.

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BNC PORT T ERMINATION

10Mbps modules with BNC ports feature a
2-pin jumper block, located at position JP1 or
JP2, for terminating a thin coaxial segment at the
media converter without an additional ‘T’ con­nector and terminator. (Jumper position is
dependent on board revision, see chart above).

To terminate a thin Ethernet segment at the media converter, attach the
cable directly to the BNC connector and set the jumper to the ON (enabled,
factory default) position by placing the jumper shunt over both pins.

If the media converter is attached to a midpoint of a thin Ethernet seg­ment, attach a ‘T’ connector to the BNC port and set the termination
jumper to the OFF (disabled) position by placing the shunt on only one pin.

NOTE

Some features may not be available on all versions of modules.

M EDIAC ONVERTER J UMPER C ONFIGURATION C HART

Module/

Board

Feature

Jumper

PositionON(pins)

OFF

(pins)

Factory

Default

10Mbps

W/BNC (-20)

BNC Termination JP2 both one or none ON

10Mbps W/BNC (-30) BNC Termination JP1 both one or none ON

10Mbps W/FIBER (-20) TP Dist. (100+ M)

Shielded Cable
FO LinkLoss
FiberAlert

JP2
JP3
JP4
JP5

one or none

both

1-2
2-3

both

one or none

2-3
1-2

OFF
OFF
OFF
OFF

10Mbps

W/FIBER (-40)

FiberAlert
FO LinkLoss
TP Dist. (100+ M)

JP1
JP2
JP3

1-2
1-2
1-2

2-3
2-3
2-3

OFF
OFF
OFF

10Mbps

W/FIBER (-10)

W/PUSLING

FIBERALERT

Plusing FiberAlert
TP LinkLoss
FO LinkLoss

JP2
N/A
N/A

1-2

ALWAYS ENA
ALWAYS ENA

2-3
N/A
N/A

OFF

ALWAYS ENA
ALWAYS ENA

100Mbps (-20) FX LinkLoss

FiberAlert
Auto-Negotiation

JP1
JP2
JP3

2-3
1-2
1-2

1-2
2-3
2-3

OFF
OFF

ON

100Mbps (-50)

FiberAlert
Auto-Negotiation
FX LinkLoss
TX LinkLoss

JP1
JP2
JP3
JP4

1-2
1-2
1-2
1-2

2-3
2-3
2-3
2-3

OFF

ON
OFF
OFF

100Mbps (-00)

W/ AUTOCROSS MDI-II/

MDI-X

FiberAlert
Auto-Negotiation
TX LinkLoss
FX LinkLoss

JP2
JP3
JP4
JP5

1-2
1-2
1-2
1-2

2-3
2-3
2-3
2-3

OFF

ON
OFF
OFF

LEDs on MediaConverter Chassis

1-Slot, 4-Slot and 8-Slot chassis include LEDs on the back of the chassis.

P

OWER

Glows green when chassis has power.

A

CTIVITY

This LED blinks green when data is being passed on either
port of a module that does not include Link/Activity LEDs.

NOTE: This LED is not applicable for modules that include Link/Activity LEDs.

LEDs on Power Supplies

P

OWER

Glows green when powered-on.

Installation Troubleshooting

• During installation, first test the fiber and twisted pair connections with all
troubleshooting features disabled, then enable these features, if desired,
just before final installation. This will reduce the features’ interference with
testing.

• When working with units where the features cannot be disabled, you must
establish BOTH your twisted pair and fiber connections before the link
LEDs will light!

• To test a media converter by itself, first make sure you have an appropriate
fiber patch cable, then follow these steps to test:

SStteepp 11::

Connect the media converter to the twisted pair

device with a twisted pair cable.

SStteepp 22::

Loop a single strand of fiber from the transmit port to

the receive port of your media converter.

SStteepp 33::

Verify that you have both twisted pair and fiber link

(see LEDs, below) on your media converter.

NOTE: Use caution when conducting a loopback test; it is possible to
create a network loop if connecting the twsited pair port to an active net­work switch. Black Box recommends connecting the twisted pair cable
to a PC for this type of test.

• Make sure to use the appropriate twisted pair cable, and have the
crossover/pass-through switch set correctly if your media converter does
not include AutoCross.

• If using a high powered device (which is designed for long distance

installations) for a short distance installation, the fiber transmitters
may overdrive the receivers and cause data loss. If this is the case,
you may need to add an optical attenuator to your connection.

For fiber specifications, please contact Black Box for more information.

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5

Thin Ethernet segments must be proper­ly terminated at both ends and grounded
at one end. If the BNC port is not ter­minated correctly, the ACTIVITY light on
the front panel will not glow.

T WISTED P AIR C ROSSOVER/PASS-THROUGH
C ONNECTIONS

Whether you are using crossover or straight-through CAT5 twisted pair
cabling, 10Mbps and 10/100 Switching Modules will support both types of
connections by one of the following methods:

AutoCross: 100Mbps (-00) Modules and 10/100 Switching Modules

include AutoCross, a feature that automatically selects between a crossover
workstation or pass-through connection depending on the connected
device.

MDI-II/MDI-X Switch: All 10Mbps Modules feature a 2-position switch,
located at position S1 (see page 3 for location on boards), for selecting a
crossover workstation connection or pass-through connection.

The switch is labeled with “X” for a crossover connection (factory default)
and an “ll” for a pass-through connection. Select the appropriate setting by
moving the switch to the proper position before installing the media con­version module. If uncertain whether crossover or pass-through is needed,
set the switch to the position that makes the link LED glow.

Device-Dependent: The type of twisted pair connection for 100Mbps
Modules (-20 and -50) modules is determined by the end device to which
the module is connected; these 100Mbps Modules do not include
AutoCross or a MDI-II/MDI-X switch.

NOTE: The appropriate type of cable must be used for a link to be established. Refer to
the documentation for the connected device for information.

T WISTED P AIR C ABLE D ISTANCE

The twisted pair port on 10Mbps Modules features a 2-position jumper,
located at position JP2, for selecting longer twisted pair cable distances (dis­tances greater than 100 meters). Place the jumper over both pins for dis­tances up to 100 meters (factory default). Remove the jumper shunt or
place it on only one pin for distances of 100 meters or more.

NOTE: The product on the other side of the conversion must be able to support longer cable
distances as well.

T WISTED P AIR C ABLE T YPE

The twisted pair port on 10Mbps Modules (-20 and -40) features a
2-position jumper, located at position JP3, for selecting either a shielded or

NOTE

When the BNC port is not being used,
Black Box recommends connecting a
50 Ω terminator to the port at each
end.of the run.

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11

unshielded twisted pair link segment. Remove the jumper shunt or place it
on only one pin to select an unshielded twisted pair link segment (factory
default). Place the jumper shunt over both pins to select a shielded twisted
pair link segment.

NOTE: This jumper is not found on -40 10Mbps module boards.

About LinkLoss and FiberAlert

10Mbps and 100Mbps Modules include the following features:

• FO/FX LinkLoss (a.k.a. "Fiber LinkLoss" or "LinkLoss")

• TP/TX LinkLoss (a.k.a. "Twisted Pair LinkLoss” or "Reverse LinkLoss”)

• FiberAlert

FiberAlert and LinkLoss are advanced troubleshooting features that can
help you locate "silent failures" on your network. However, it is vital that you
understand exactly how FiberAlert and LinkLoss work, and how they will
react in your network configuration, before attempting to install the enclosed
module(s).

Installing modules without understanding the effects of FiberAlert and
LinkLoss can cause perfectly functioning units to appear flawed or

even dead.

A

BOUT L INK

I NTEGRITY

During normal operation, link integrity pulses are transmitted by all point­to-point Ethernet devices. When a Black Box media converter receives valid
link pulses, it knows that the device to which it is connected is up and send­ing pulses, and that the copper or fiber cable coming from that device is
intact. The appropriate “LNK” (link) LED is lit to indicate this.

The Black Box media converter also sends out link pulses from its copper
and fiber transmitters, but normally has no way of knowing whether the
cable to the other device is intact and the link pulses are reaching the other
end. The combination of FiberAlert and LinkLoss allows this information to
be obtained, even when physical access to a remote device (and its link
integrity LED) is not available.

W HAT I S FO/FX LINKL OSS?

FO/FX LinkLoss is a troubleshooting feature. When a fault occurs on the
fiber segment of a conversion, FO/FX LinkLoss detects the fault and passes this
information to the twisted pair segment. If a media converter is not receiv­ing a fiber link, FO/FX LinkLoss disables the transmitter on the media con­verter's twisted pair port. This results in a loss of link on the device con­nected to the twisted pair port.

LEDs on 10Mbps Modules with BNC ports

The LED function on 10Mbps Modules with BNC ports is as follows:

TP L

INK

Glows green when link is established on the TP port.

A

CTIVITY

Glows amber when data is being passed on the TP port.

LEDs on 100Mbps Modules (-20 and -50)

The LED functions on 100Mbps Modules are as follows:

FX L

INK

Glows green when link is established on the FX port.

FX A

CTIVITY

Glows amber if data is being passed on the FX port.

TX P

AIRLINK

Glows green if link is established on the TX port.

TX A

CTIVITY

Glows amber when data is being passed on the TX port.

LEDs on Gigabit and 100Mbps Modules (-00)

The LED functions on Gigabit and 100Mbps Modules (-00) are as follows:

LEDs on 10/100 Switching Modules

The LED functions on 10/100 Mbps switching modules are as follows:

FX L

INK

/ACT

Glows green when link is established on the FX port;
blinks green when activity is detected on the port

TX L

INK

/ACT

Glows green when link is established on the TP/TX port;
blinks green when activity is detected on the port

10

7

P OWER S UPPY I NSTALLATION T IP

When installing a redundant power supply module into a powered-on
chassis, Black Box recommends setting the ON/OFF switch on the module
(if present) to OFF. After installing the power supply, turn its switch ON. If
the redundant power suppply module does NOT have an ON/OFF switch,
Black Box recommends powering-down the chassis before installing the
power supply. Turn the chassis back ON after installing the power supply.

LED Operation

Each media conversion module features diagnostic LEDs (see diagrams
below) that provide information on features and ports.

LEDs on 10Mbps Modules with Fiber ports

The LED functions for 10Mbps Modules with fiber ports are as follows:

FO L

INK

Glows green when link is established on the fiber port.

F

IBERALERT

Glows amber when FiberAlert is enabled.

TP L

INK

Glows green when link is established on the TP port.

A

CTIVITY

Blinks amber when data is being passed on either port.

(Note: On a -40 10Mbps Module, the TP RCV, TP LNK and FO Link LEDs flicker at a

rate proportional to the rate that data is being passed on the ports. When traffic is
low, the LEDs flicker visibly, while they appear to glow when traffic is high.)

LEDs on 10Mbps Modules with Fiber ports (-10)

The LED functions on 10Mbps Modules (-10) are as follows:

FO L

INK

/ACT

Glows green when link is established on the FO port;
blinks green when activity is detected on the port

TP L

INK

/ACT

Glows amber when link is established on the TP port;
blinks amber when activity is detected on the port

W HAT I S TP/TX LINKL OSS?

TP/TX LinkLoss is another troubleshooting feature. When a fault occurs
on the twisted pair segment of a conversion, TP/TX LinkLoss detects the fault
and passes this information to the fiber segment. If a media converter is not
receiving a twisted pair link, TP/TX LinkLoss disables the transmitter on the
media converter's fiber port. This results in a loss of link on the device con­nected to the fiber port.

W HAT

I S F IBERA LERT?

FiberAlert minimizes the problems
associated with the loss of one strand
of fiber. If a strand is unavailable, the
Black Box device at the receiver end
notes the loss of link. The device will
then stop transmitting data and the
link signal until a signal or link pulse is
received. The result is that the link LED on BOTH sides of the fiber con­nection will go out indicating a fault somewhere in the fiber loop. Using
FiberAlert, a local site administrator is notified of a fault and can quickly
determine where a cable fault is located.

Enable FiberAlert on ONE side of a media conversion only; enabling
it on both sides would keep both transmitters off indefinitely!

W HAT I S P ULSING F IBERA LERT?

Pulsing FiberAlert minimizes the
problems associated with the loss of
one strand of fiber. If a strand is
unavailable, the IMC Networks
device at the receiver end notes the
loss of link. The device will stop
transmitting data and start sending
link pulses. Until a valid link is
received, the fiber link LED will be
OFF on the device on the receiver side of the fiber strand with the fault
while the fiber Link LED on the other unit will blink. Pulsing FiberAlert noti­fies a local site administrator of a fault, allowing quick determination of
where a cable fault resides.

NOTE: You can enable Pulsing FiberAlert on BOTH sides of a conversion.

U SING F IBERA LERT AND L INKL OSS

The following chart provides an overview of the troubleshooting features,
their functionality and the recommended settings for a pair of media con­verters in a typical central/main site to remote site application:

Product with enabled —Remote Site stops transmitting

Local Link LED is OFF indicating a break in the fiber loop

FiberAlert

XMT

RCV

LED

Remote Site

Local Site

LED OFF = Broken Link

LED

XMT

RCV

Cable Break

8

9

C ONFIGURING L INKL OSS AND F IBERA LERT

Configure LinkLoss and FiberAlert with separate 3-pin jumper blocks
located at various positions depending on module and board type. See the
chart on page 3 of this manual to determine what features your module
offers as well as the jumper locations and ON/OFF positions.

Auto-Negotiation

The following chart states the availability of the Auto-Negotiation feature
on media conversion modules.

A UTO-NEGOTIATION ON 100 MBPS M ODULES

When Auto-Negotiation is enabled, the media converter negotiates as
a 100 Mbps Full-Duplex device; if the device the media converter is con­nected to can operate at 100 Mbps Full-Duplex, a link will be established.
If the twisted pair port on the other device does not have the ability to auto­negotiate, or if a 100 Mbps Half-Duplex connection is desired, Auto­Negotiation on the media converter must be disabled. Half- and Full­Duplex settings must be manually set and match on both end devices to
which the media converters are connected. The diagram below shows a
typical application, followed by a table with three possible configurations.

Configure Auto-Negotiation on 100Mbps Modules with a 3-pin jumper block
located on the module’s PCB. Please see the diagrams and chart on pages 2-3
of this manual to verify jumper position and default setting.

End to End Connection Switch TX/FX Converter

Half-Duplex Manually Configure HDX Auto-Negotiation Off

Full-Duplex Manually Configure FDX Auto-Negotiation Off

Full-Duplex Auto-Negotiation On Auto-Negotiation On

Auto-Negotiation Product Comparison

10Mbps Modules Auto-Negotiation Not Available

100Mbps Modules Auto-Negotiation DIP Switch Selectable

10/100Mbps Modules Auto-Negotiation Always Enabled

L INK

L OSS/FIBERA LERT C OMPARISON T ABLE

Feature Fault Location Disabled LEDs Enable At:

FX LinkLoss Fiber Twisted Pair Main Site Only

TX LinkLoss Twisted Pair Fiber Remote Site Only

FiberAlert Fiber Fiber Remote Site Only

A UTO-NEGOTIATION ON 10/100 SWITCHING
M ODULES

Auto-Negotiation is a standard feature on 10/100 Switching Modules. The
fiber port always operates at 100 Mbps FDX; the copper port auto-senses the
connected device’s speed and duplex mode: 10 Mbps or 100 Mbps and
HDX or FDX (including Flow Control).

NOTE: This module is a Plug-And-Play device, therefore Auto-Negotiation is always enabled.

Installing Media Conversion Modules

You can install media conversion modules in any available slot in a Media
Converter chassis. Media conversion modules are hot-swappable.

Media conversion modules ship with brackets for securing them to the
Media Converter chassis. To install a module, simply unscrew the blank
bracket covering the slot where you will install the module. Slide the module
into the chassis, via the cardguides, until the module is seated securely in the
connector, screw in the bracket supplied with the module, then connect the
cables.

I NSTALLATION T IP

Since single-strand fiber products use optics that transmit and receive on two
different wavelengths, you must deploy single-strand fiber products in pairs, or
connect two compatible Black Box single-strand fiber products. For example, connect
Compact Media Converter, TX/SSFX-SM1310-SC (which has 1310 xmt and 1550 rcv) to a
product which has 1550 xmt and 1310 rcv, e.g. 100 Mbps TX/SSFX-SM1550-SC Module.
The two connected products must also have the same speed and distance capabilities
(i.e. both are single-mode [20km] or both are single/PLUS [40km]).

NOTE

Media Converter chassis ship with all but one media conversion module slot cov­ered with “blank” brackets. Be sure to keep unused slots covered for EMI con­tainment. It is a good idea to save any “blanks” removed during installation for
future use if configuration requirements change.