Nortel Networks 1000 - Manual (Page 637)

Physical description 637
Table 243 "Supported trunk and signaling matrix" (page 637) shows a
matrix of the trunk types and signaling supported by the NT8D15 E and M
Trunk Card.
Table 243
Supported trunk and signaling matrix
Signaling
RLM
RLR
ATV TIE PAG
CSA
CAA
CAM
2-wire E and M yes yes yes yes yes
4-wire E and M yes yes yes yes yes
Physical description
The line interface and common multiplexing circuitry is mounted on a 31.75
cm by 25.40 cm (12.5 in. by 10 in.) printed circuit board.
The E and M Trunk card connects to the backplane through a 160-pin
connector shroud. External equipment connects to the card at the back
of the Media Gateway using a 25-pin connector. Telephone lines from
station equipment cross connect to the OPS analog line card at the MDF
using a wiring plan similar to that used for line cards. See Communication
Server 1000M and Meridian 1 Large System Installation and Configuration
(NN43021-310) for termination and cross connect information.
Each card provides four circuits. Each circuit connects with the switching
system and with the external apparatus by an 80-pin connector at the rear
of the pack. Each trunk circuit on the card connects to trunk facilities by tip
an ring leads which carry voice, ringing, tone signaling and battery. Trunk
option selection is determined by software control in LD 14.
Figure 207 "E and M Trunk card - faceplate" (page 639) illustrates the
faceplate of the E and M Trunk card. The words "Dict Trk" appear on the
faceplate label because earlier versions of this card provided dictation
trunk connections for third-party equipment.
The faceplate of the card is equipped with a red LED. When an E and M
trunk card is installed, the LED remains lit for two to five seconds while
the self-test runs. If the self-test completes successfully, the LED flashes
three times and remains lit. When the card is configured and enabled in
software, then the LED goes out. If the LED continues to flash or remains
weakly lit, replace the card.
The E and M trunk has a microprocessor which performs a number
of operations. On power up a self test of the circuitry on the card is
performed. The self-test can also be requested by a command entered in
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.