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Wiring Information
September 1995 Issue 1
E-3
Figure E-2. A Telephone Line Jack in a 4-Wire Configuration
NOTE:
Regardless of configuration, all wiring between the switch and the wall jack
must consist of twisted-pairs. Use the supplied line cord with the telephone,
or use an AT&T approved equivalent. An 8-wire modular cord
must
be used
for all 4-wire and 2-wire installations requiring auxiliary power for adjuncts
such as a hands-free speaker/microphone.
Table E-1. Pinouts on 8-Pin Line Jack
Modular Wall Jack Wiring
Pin Pair Color Description
1 2 W-O 4-Wire Output
2 2 O-W 4-Wire Output
3 3 W-G 4-Wire Input
4 1 BL-W 2-Wire (Tip)
5 1 W-BL 2-Wire (Ring)
6 3 G-W 4-Wire Input
7 4 W-BR Adjunct Power -48V
8 4 BR-W Adjunct Power Common
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