Nortel Networks Circuit Card - Manual (Page 655)

NT8D15 E&M Trunk card Page 655 of 906
Circuit Card Description and Installation
Connector pin assignments
The E&M trunk card brings the four analog trunks to the backplane through
a 160-pin connector shroud.The backplane is cabled to the I/O panel on the
rear of the module, which is then connected to the Main Distribution Frame
(MDF) by 25-pair cables.
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 153 on page 657 . A list of
the connections to the E&M trunk card in the various 2-wire modes is shown
in Table 206. A list of the connections to the E&M trunk card in the various
4-wire modes is shown in Table 207 on
page 656 .
See the Communication Server 1000S: Installation and Configuration
(553-3031-210) for complete I/O connector information and wire
assignments for each tip/ring pair.
Table 206
E&M trunk card – backplane pinouts for 2-wire modes
Trunk
Number
2-wire Paging Mode 2-wire Type I Mode
Pin Signal Pin Signal Pin Signal Pin Signal
0 12B Tip 12A Ring 12B Tip 12A Ring
15B A 15A PG 14B E 14A M
1 16B Tip 16A Ring 16B Tip 16A Ring
19B A 19A PG 18B E 18A M
2 62B Tip 62A Ring 62B Tip 62A Ring
65B A 65A PG 64B E 64A M
3 66B Tip 66A Ring 66B Tip 66A Ring
69B A 69A PG 48B E 68A M