AT&T 518-600-016 manual Cause Possible Solution To Investigate Further

Possible	Cause	Possible Solution	To Investigate Further
1. A faulty control unit or		If the lights are dim when	Contact the equipment
Power Supply	Module	testing an analog set look for	supplier for assistance.
(Continued).		a faulty control unit or Power
		Supply Module. You may
		need an auxiliary power
		s u p p l y .
		If the lights are dim when
		testing a digital set with a
		data stand, the trouble is its
		power supply.
2. A faulty voice terminal.		Use these steps to try to
		correct the problem:
		1 Unplug the modular
		voice terminal cord from
		the malfunctioning voice
		terminal.
		2 Plug the cord into a
		working voice terminal
		of the same type (either
		analog or digital).
		3 On an analog set slide
		its T/P switch to the T
		position and hold it there
		if necessary.
		or
		On a digital set with a
		data stand, turn the unit
		over and press the
		recessed Self-Test button
		with a pointed object
		such as a straightened
		paper clip.
		(Continued)

4-42 Procedures for Specific Symptoms