Distance Limitations; Power Requirements; Power Failure Operation - AT&T Callmaster Series Reference Manual

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.
SYSTEM
SYSTEM 85
DEFINITY G2
DEFINITY G1 & G3
SYSTEM 75

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