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Clear-Com EF-701M User Manual

Page 15

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E F - 7 0 1 M I N T E R F A C E

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in Figure 1-3. At the other end of the fiber there is another EF-701M unit and PL system
with walkie-talkies interfaced through a TW-47 Interface. The EF-701M allows the
people on the first PL system to communicate with the people on the walkie-talkies over a
kilometer of fiber, with the call signal determining transmit or receive operation.

Figure 1-3: Interfacing two party-line systems over a kilometer of fiber

Note: The terms modem, codec, and interface all refer to devices that convert one type of

signal for transmission or reception to a different type of signal.

Because of the EF-701M’s low profile and compact size, it can function either as a
stand-alone device, or it can be mounted on utility rack shelves. Up to three units will fit

3

3

= Male 3-Pin XLR

= Female 3-Pin XLR

Party-Line Intercom

EF-701M

EF-701M

Fiber Modems

TW-47

PK-7

Base

Walkie

Talkie

Remote

Walkie

Talkies

3

3

3

3

DB15

3

DB15

3 3

3

DB9