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IROB Protectors
Equipment that is connected to the analog station jacks
(408/008) and is located in a building outside of the main
(control unit location) building, but within 1000 feet of the
control unit, is called In-Range, Out-of-Building (IROB)
equipment. To protect both the control unit and the IROB
equipment from exposure to lightning, in advertent contact
with power lines, and power currents induced by nearby
power lines, IROB protectors are required. Two TII
Model 343 IROB Protectors are required for every analog
station jack that is connected to IROB equipment. Place
one IROB protector where the cable from the control unit
leaves the building, and place the other where the cable
enters the building in which the IROB equipment is
located (Figure 2-35). Refer to the installation notes that
are packed with the IROB Protector for detailed
instructions on proper installation. See “System
Grounding Requirements” on page 2-5 for more
information on grounding.
.
WARNING:
Only analog station-modules (408, 008) are
to be used for In-Range, Out-of-Building (IROB)
applications. The Digital Station Modules (008D) and
the Basic Telephone Modules (012) cannot be used for
IROB applications.
2-126 Adding Accessories