AT&T System 25 - Manual (Page 288)

APPENDIX A: System Wiring Tables
Table A-A. 25-Pair Connector Pin Assignments
25-Pin Corm. C a l l G S L S Tlp Ring ATL MET Backplane
Pin No. W i r e Proc. Trunk Trunk Line Line Line Pin No.
Color Z T N 8 2 N76 ZTN77 Z T N 7 8 ZTN79 TN735 (Slots 1-12) .
26 W-BL RDA T1 T1 T1 T1 T1 102
1 BL-W SGA RI RI RI R1 R1 002
27 w - o CT1 BTI 103
2 o - w DCDA CR1 BR1 003
28 W-G DTRA P-1 LT 1 104
3 G-W TDA P+l LTR 1 004
29 W-BR RDB T2 T2 T2 T2 T2 105
4 BR-W SGB R2 R2 R2 R2 R2 005
30 w-s CT2 BT2 106
5 s - w DCDB CR2 BR2 006
31 R-BL DTRB P-2 LT2 107
6 BL-R TDB P+2 LTR2 007
32 R-O RDC T3 T3 T3 T3 T3 108
7 O-R SGC R3 R3 R3 R3 R3 008
33 R-G CT3 BT3 109
8 G-R DCDC CR3 BR3 009
34 R-BR DTRC P-3 LT3 110
9 BR-R TDC P+3 LTR3 010
35 R-S RDD T4 T4 T4 T4 T4 111
10 S-R SGD R4 R4 R4 R4 R4 011
36 BK-BL CT4 BT4 112
11 BL-BK DCDD CR4 BR4 012
37 BK-O DTRD P-4 LT4 113
12 O-BK TDD P+4 LTR4 013
38 BK-G T5 T5 T5 T5 302
13 G-BK R5 R5 R5 R5 202
39 BK-BR CT5 303
14 BR-BK CR5 203
40 BK-S P-5 3(M
15 S-BK P+5 204
41 Y-BL T6 T6 T6 T6 305
16 BL-Y R6 R6 R6 R6 205
42 Y-o CT6 306
17 o-Y CR6 206
43 Y-G P-6 307
18 G-Y P+6 207
44 Y-BR T7 T7 T7 T7 308
19 BR-Y R7 R7 R7 R? 208
45 Y-s ETU48 CT7 309
20 s-Y ETUGD CR7 209
46 V-BL ETU48 P-7 310
21 BL-V ETUGD P+7 210
47 v-o T8 T8 T8 T8 311
22 o-v R8 R8 R8 R8 211
48 V-G ETU48 CT8 312
23 G-V ETUGD CR8 212
49 V-BR ETU48 P-8 313
24 BR-V ETUGD P+8 213
50 v-s GND GND GND GND GND 300
25 s-v GND GND GND GND GND 200
Note: TN747 is same as ZTN76 and ZTN77. TN762 is same as ZTN79.
A-2