AT&T 518-600-016 manual Equipment that is connected to the analog station jacks, Irob applications

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