Nortel Networks Circuit Card 311 - Manual (Page 719)

Physical description 719
Table 269
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 223 "E and M Trunk card - faceplate" (page 721) 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 maintenance
programs. The card faceplate Light-Emitting Diode (LED) is lit while the self
test is performed. If the self test passes, the faceplate LED flashes three
times and stays lit until the card is enabled in software. If the test fails,
the LED stays lit (does not flash).
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.