Clear-Com PL-PRO EF-1M, Инструкция по эксплуатации

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4 - 2 E F - 1 M I N T E R F A C E
Simply connect the 4-wire audio and 4-wire data between EF-1M units utilizing this
cable. This will form a direct connection between the DB-15 connectors on a pair of
EF-1M units. The PL systems at each end of the cable will require their own power and
termination for their local channel.
Up to 5000 ft. (1.52 km) of CAT 3 or better cable, and possibly more, may be used to
connect between EF-1M units in this manner.
FIBER-OPTIC
Fiber optic transmission offers a number of advantages over copper:
• There is no susceptibility to electromagnetic interference.
• Fiber-optic cable is much lighter and more space efficient than copper, even for a single
channel.
• Transmission distance, in many cases, can be substantially longer.
• It is more difficult to eavesdrop on a fiber transmission.
WARNING: Always use extreme caution with fiber-optic equipment. Never look directly into
the light port or into a connected cable with a unit powered up. Even if you don’t see visible
light, you could be exposing your eyes to invisible light from an infrared laser. This can cause
damage to your vision. Always observe all manufacturer’s recommendations and warnings.
Use twisted-pair
cable to connect
4-wire audio and
4-wire data between
EF-1M units.