AT&T System 25 - Manual (Page 290)

APPENDIX A: System Wiring Tables
Table A-B. Building Wiring
25-Pair Cable 4-Pair Cable
Term. Lead Functions
5 0 0 ATL
7 1 0 1 A Cordless D-Inside D-Inside
Cable Conn. C a b l e Conn.
Ckt. 2 5 0 0 7300H RS-232C Color P i n Color Block
No. Series S e r i e s Term , code Num. code Term.
1 T T W-BL 26 W-BL 1
R R BL-W 1 BL-W 2
CT w-o 27 w-o 3
CR TXR o-w 2 o-w 4
P- PXT W-G 28 W-G 5
P+ PXR G w 3 G-W 6
W-BR 29 W-BR 7
BR-W 4 BR-W 8
2 T T w-s 30 W-BL 1
R R s-w 5 BL-W 2
CT R-BL 31 w-o 3
CR TXR BL-R 6 o-w 4
P- PXT R-O 32 W-G 5
P+ PXR O-R 7 G-W 6
R-G 33 W-BR 7
G-R 8 BR-W 8
3 T T R-BR 34 W-BL 1
R R BR-R 9 BL-W 2
CT TXT R-S 35 w-o 3
CR TXR S-R 10 o-w 4
P- PXT BK-BL 36 W-G 5
P+ PXR BL-BK 11 G-W 6
BK-O 37 W-BR 7
O-BK 12 BR-W 8
4 T T BK-G 38 W-BL 1
R R GBK 13 BL-W 2
CT TXT BK-BR 39 w-O 3
CR TXR BR-BK 14 o-w 4
P- PXT BK-S 40 W-G 5
P+ PXR S-BK 15 G-W 6
Y-BL 41 W-BR 7
BL-Y 16 BR-W 8
5 T T Y-o 42 W-BL 1
R R O-Y 17 BL-W 2
CT Y-G 43 w-o 3
CR TXR G-Y 18 o-w 4
P- PXT Y-BR 44 W-G 5
P+ PXR BR-Y 19 G-W 6
Y-s 45 W-BR 7
S-Y 20 BR-W 8
A - 4