Nortel Enterprise 1000 Reference Manual page 123

Table 25
E&M trunk card — backplane pinouts for 2-wire modes
Trunk
Number
Pin
12B
0
15B
16B
1
19B
62B
2
65B
66B
3
69B
Succession Communication Server for Enterprise 1000 Circuit Card Reference Guide
connector. Telephone trunks connect to the E&M trunk card at the MDF
using a wiring plan similar to that used for line cards.
A typical connection example is shown in Figure 44. A list of the connections
to the E&M trunk card in the various 2-wire modes is shown in Table 25. A
list of the connections to the E&M trunk card in the various 4-wire modes is
shown in Table 26. See Succession Communication Server for Enterprise
1000 Planning and Installation Guide (553-3023-210) for complete I/O
connector information, and wire assignments for each tip/ring pair.
2-wire Paging Mode
Signal Pin
Tip 12A
A 15A
Tip 16A
A 19A
Tip 62A
A 65A
Tip 66A
A 69A
NT8D15 E&M Trunk Card
Signal Pin
Ring 12B
PG 14B
Ring 16B
PG 18B
Ring 62B
PG 64B
Ring 66B
PG 48B
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2-wire Type I Mode
Signal Pin
Tip 12A
E 14A
Tip 16A
E 18A
Tip 62A
E 64A
Tip 66A
E 68A
Signal
Ring
M
Ring
M
Ring
M
Ring
M