AT&T System 85 manual Definity G1 & G3

7102A and 7102 Plus Voice Terminals

Distance Limitations

The maximum allowable distances of a 7102A or 7102 Plus voice terminal from the DEFINITY G1, G2, G3, System 75, or System 85 cabinet are shown in the table below.

		NOMINAL MAXIMUM RANGE
SYSTEM	PORT BOARD		IN FEET (METERS)
		24 AWG		26 AWG
SYSTEM 85	SN229	3,500	(1,067)	3,500	(1,067)
	SN228B	28,400	(8,662)	17,900	(5,460)
DEFINITY G2	SN229	3,500	(1,067)	3,500	(1,067)
	SN228B	28,400	(8,662)	17,900	(5,460)
	TN742	15,200	(4,633)	10,000	(3,050)
	TN746	3,000 (915)		2,000 (610)
DEFINITY G1 & G3	TN742	15,200	(4,633)	10,000	(3,050)
SYSTEM 75	TN769	15,200	(4,633)	10,000	(3,050)
	TN746	3,000 (915)		2,000 (610)

Power Requirements

The 7102 voice terminals are powered by the tip and ring leads. These voice terminals do not require any external power supply.

Power Failure Operation

The 7102A and the 7102 Plus voice terminals can be used as an emergency station during power failure transfer conditions but will not support any adjuncts.

If the 7102A or 7102 Plus voice terminal is being used as an emergency station for a DEFINITY G1 or G3 or System 75 that is equipped with a Z1A Emergency Transfer Unit, a ground start switch (551A and 77A bracket) is required. Installation instructions can be found in the DEFIN- ITY Communications System Generic 1 and Generic 3 Wiring Guide, 555-204-111.

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