AT&T 518-600-016 manual Faulty cable connection

Possible Cause	Possible Solution	To Investigate Further
3. Faulty cable connection.	Step 1. Go to the control	If the trouble still occurs, the
	unit and locate the intercom
		trouble is in the control unit.
	jacks for the malfunctioning
		Call the equipment supplier
	voice terminal and for a
		for assistance.
	working voice terminal of
	the same type (analog or
	digital). Unplug both from
	the control unit and replug
	the working voice terminal
	into the malfunctioning
	voice terminal jack. See if
	the trouble occurs on the
	working voice terminal.
	If the trouble no longer	Go to Step 2.
	occurs, the trouble is caused
	by one of the cables running
	to the malfunctioning voice
	terminal.
	Step 2. Replace each cable
	of the wiring run to the
	malfunctioning voice
	terminal one at a time, and
	test the malfunctioninig voice
	terminal after each cable is
	replaced. If the trouble still
	occurs the replaced cable is
	not the faulty one. Replace
	the next cable.
	If the trouble no longer
	occurs, you’ve found the
	faulty cable and corrected
	the problem.

4-44 Procedures for Specific Symptoms