AT&T System 25 - Manual (Page 291)

APPENDIX A: System Wiring Tables
Table A-B. Building Wiring (Contd)
25-Pair Cable 4-Pair Cable
Term. Lead Functions
5 0 0 ATL
7101A Cordless D-inside D-lnside
Cable Conn. Cable Conn.
Ckt. 2 5 0 0 7 3 0 0 H RS-232C C o l o r Pin Color Block
N o . Series Series Term . Code Num. code Term.
6 T T V-BL 46 W-BL 1
R R BL-V 21 BL-W 2
CT TXT v-o 47 w-o 3
CR TXR o-v 22 o-w 4
P- PXT V-G 48 W-G 5
P+ PXR G-V 23 G-W 6
V-BR 49 W-BR 7
BR-V 24 BR-W 8
Spare v-s 50
s-v 25
A-5