Black Box LE740-TPSTS20, LE740-BNSTM, LE740-TPBNC, LE7408A, LE740-SMMM2 Installation Manual

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Modular Media Converter Installation Guide

(includes 10 Mbps Ethernet, 100 Mbps Fast Ethernet and

Protocol-Independent Fiber Mode Conversion Modules)

Modular Media Converters are designed to convert between 100Base-TX,
100Base-FX and 100Base-FX-SingleMode Fast Ethernet cabling, 10Base-2,
10Base-T, 10Base-FL and 10Base-FL-SingleMode Ethernet cabling or protocol­independent single/multi-mode fiber optic cabling.

About Media Converter Chassis

Media Converter modular chassis are user-configurable, provide power to
the media conversion module and are available with one, four, eight or 12
slots for installing any combination of interchangeable media conversion
modules that include 10 Mbps Ethernet Modules, 100 Mbps Fast Ethernet
Modules and S2MM Module Sets (protocol-independent single/multi-mode
fiber). For example an 8-Port Media Converter can be configured with one to
eight 10 Mbps Modules and 100 Mbps Modules or one to four S2MM Module

Sets in any combination.

Note: S2MM Module Sets consist of two modules and require two media conversion

module slots so they can not be used in a 1-Port chassis.

1-Port (LE7401A and LE7401A-R2) and 4-Port (LE7404A) Media Converters
are stand-alone chassis that include one or four media conversion module
slots, respectively, and a fixed 95/240 VAC power supply. 8-Port Media
Converters (LE7408A) are 1U high, rackmountable, include eight media
conversion module slots and a fixed 95/240 VAC power supply. There are
two 12-Port Media Converter chassis; both are rackmountable and include
12 media conversion module slots and either a 95/240 VAC or -48 VDC
Power Supply Module with an additional slot for installing a second fault­tolerant Power Supply Module. The basic differences between the two are
the chassis’ height and location of the Power Supply Modules. The 12-Port
Media Converter 1U (LE7412A and LE7412A-DC) has the power on the rear
side of the chassis with media conversion module slots on the opposite side,
and is 1U high. The 12-Port Media Converter 2U (LE4712A-2 and LE7412A-
2DC) has both power and media conversion module slots on the front of the
chassis and is 2U high.

LE740-TPSTM LE740-TPSTS20 LE740-TPBNC LE7408A
LE740-BNSTM LE740-SMMM2 LE740-SMMM LE7404A
LH740-TPSCM LH740-TPSTS LH740-TPSCS LE7401A
LH740-TPSTS20 LH740-TPSCS20 LE7412A LE7401A-R2
LE7412A-DC LE7412A-2DC LH740-TPSTM LE7412A-2
LE740-TPSTS

About 10 Mbps Media Conversion Modules

Media conversion modules for 10 Mbps Ethernet have two different
types of ports on them and require one slot in a Media Converter chassis for
a single 10 Mbps Ethernet conversion. The following versions of 10 Mbps
Modules are available:

10BT (RJ-45) - 10BFL Module (half- or full-duplex) — converts 10Base-T

(RJ-45) to 10Base-FL 850 multi-mode fiber; includes one pair ST
(LE740-TPSTM) connectors

10BT (RJ-45) - 10BFL SM Module (half- or full-duplex) — converts

10Base-T (RJ-45) to single-mode fiber; includes one pair ST
(LE740-TPSTS) connectors

10BT (RJ-45) - 10BFL SM/PLUS Module (half- or full-duplex) — same as

above only with higher power budget; includes one pair ST (LE740­TPSTS20) connectors

10BT (RJ-45) - 10B2 (BNC) Module — converts 10Base-T (RJ-45) to

10Base-2 (LE740-TPBNC)

10B2 (BNC) - 10BFL Module — converts 10Base-2 to 10Base-FL multi-

mode fiber; includes one pair ST (LE740-BNSTM) connectors

About 100 Mbps Media Conversion Modules

Media conversion modules for 100 Mbps Fast Ethernet have two
different types of ports on them and require one slot for a single 100 Mbps
Fast Ethernet conversion. The following 100 Mbps Modules are available:

100B TX - 100B FX Module (half- or full-duplex) — converts 100Base-TX

(RJ-45) to 100Base-FX multi-mode fiber; includes one pair ST
(LH740-TPSTM) or SC (LH740-TPSCM) connectors

100B TX - 100B FX SM Module (half- or full-duplex) — converts 100Base-

TX (RJ-45) to single-mode fiber; includes one pair ST
(LH740-TPSTS) or SC (LH740-TPSCS) connectors

100B TX - 100B FX SM/PLUS Module (half- or full-duplex) — as above

with higher power budget; includes one pair ST (LH740-TPSTS20) or
SC (LH740-TPSCS20) connectors

About Protocol-Independent Fiber Mode Conversion Module Sets

To do a fiber mode conversion, S2MM Module Sets are used. Unlike 100
Mbps Modules and 10 Mbps Modules, each S2MM Module Set consists of

two modules and requires two slots in a Media Converter chassis to do a
single conversion. One module in the set has a single-mode receive (RCV)
port and a multi-mode transmit (XMT) port. The other module has a multi­mode receive (RCV) port and a single-mode transmit (XMT) port. The
single-mode port is identified by a solid white bar on each of the modules.

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S2MM Module Sets use LED transmitters and are available for the

following conversions:

S2MM1300 Module Set (LE740-SMMM2) — converts 1300-nm single-

mode to 1300-nm multi-mode fiber (ST)

S2MM1300/PLUS Module Set (LE740-SMMM) — same as above

only single-mode has higher power budget

NOTE: 10 Mbps Modules, 100 Mbps Modules and S2MM Module Sets will be
referred to as “Media Conversion Modules” throughout the rest of this document
except where differences need to be indicated.

Configuring Media Conversion Modules

Before installing, media conversion modules with twisted pair ports may
be configured for LinkLoss and/or either a crossover workstation or pass­through repeater/hub connection (10 Mbps only). Media conversion
modules with fiber ports may be configured for FiberAlert. Port termination
may need setting on 10 Mbps Modules with BNC ports. 10BT (RJ-45) -
10BFL Modules have two additional jumpers, one for shielded/unshielded
twisted pair and one for longer twisted pair distances. 100 Mbps modules
may be configured for Autonegotiation. S2MM Modules Sets come ready to
install.

The following diagrams show where the jumpers and switches are
located on the various media conversion modules.

NOTE: Some features may not be available on all versions of media conversion

modules.

TP

Crossover Switch (S1)

Pass-Through/

S1

S1

Crossover

Pass-Through

Default

BNC Termination

Jumper (JP1)

Default

OFFON

10BT (RJ-45) - 10B2 (BNC)

BNC Termination

Jumper (JP2)

FiberAlert

Jumper (JP3)

Default

Default

OFF

ON

10B2 (BNC) - 10BFL

100BTX - 100BFX

Fiber Alert Jumper (JP1)
Autonegotiation Jumper (JP2)
FX LinkLoss Jumper (JP3)
TX LinkLoss Jumper (JP4)

Default

Disabled

Enabled

TP

Crossover Switch (S1)

Pass-Through/

Crossover

Default

S1

S1

Pass-Through

10BT (RJ-45) - 10BFL

Fiber Alert Jumper (JP1)
TP LinkLoss Jumper (JP2)
Twisted Pair
Distance Jumper (JP3)

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Twisted Pair Crossover/Pass-Through Switch

All 10 Mbps Modules with twisted pair ports have one RJ-45 connector
for a single shielded or unshielded twisted pair link segment. Each twisted
pair port features a 2-position switch, located at position S1, for selecting a
crossover workstation connection or pass-through repeater/hub connection.

The switch is labeled with “X” for a crossover connection (factory default)
and a “ll” for a pass-through connection. To select the appropriate setting,
simply move 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.

Twisted Pair Cable Type

The twisted pair port on10BT (RJ-45) - 10BFL Modules features a
2-position jumper, located at position JP3, for selecting either a shielded or
unshielded twisted pair link segment. The jumper is labeled with “STP IN”
and “UTP OUT”. An unshielded twisted pair link segment (factory default)
is selected when the shunt is removed or on only one pin. Place the shunt
over both pins for a shielded twisted pair link segment.

Twisted Pair Cable Distance

The twisted pair port on 10BT (RJ-45) - 10BFL Modules features a
2-position jumper, located at position JP2, for selecting longer twisted pair
cable distances (distances greater than 100 meters). The jumper is labeled
with “NORMAL IN” and “LONG OUT”. Place the shunt over both pins for
distances up to 100 meters (factory default). Remove the 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.

About LinkLoss and FiberAlert

Some of the aforementioned media conversion modules come with the
following troubleshooting 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).