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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 protocol-
independent 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 fault-
tolerant 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 (LE740-
TPSTS20) 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 multi-
mode 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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Summary of Contents for LE740-TPSTM

Page 1: ...408A 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 Ethern...

Page 2: ...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...

Page 3: ... OFF indicating a break in the fiber loop FiberAlert X LED XMT RCV 5 6 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 FiberAlert should only be enabled on one side of a media conversion Enabling it on both sides would keep both transmitters off indefinitely Using FiberAlert and LinkLoss In a typical cent...

Page 4: ... Media conversion modules are shipped with brackets for securing them to the Media Converter chassis Media conversion modules attach to a connector inside the Media Converter chassis To install a module simply unscrew the blank bracket covering the slot where the module is to be installed slide the module into the chassis via the cardguides until the module is seated securely in the connector Secu...

Page 5: ...t The function of the LED next to the Fiber Link LED depends on whether FiberAlert is enabled If FiberAlert is disabled this LED functions as an Activity LED and flickers amber when activity is detected on the fiber port If FiberAlert is enabled this LED glows amber upon power up then flickers when activity is detected on the fiber port The Twisted Pair Link LED glows green when a link is establis...

Page 6: ...d The information in this document is subject to change without notice Black Box Corporation assumes no responsibility for any errors that may appear in this document Specific brands and product names may be trademarks and are the property of their respective companies Document Number 51 80780BB 00 D2 November 2001 12 11 LEDs on S2MM The following diagram shows the LEDs on an S2MM Each module in S...

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