Nortel Networks Circuit Card 311 - Manual (Page 560)

560 NT8D09 Analog Message Waiting Line card
Table 226
Transmission Profile Changes
Vintage A/D convertor gain D/A convertor gain
Previous to AK –3.5 dB –2.5 dB
AK and later –3.5 dB –0.5 dB
The analog message waiting line card brings the 16 phone lines to the IPE
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
MDF by 25-pair cables.
Telephone lines from station equipment cross connect to the analog
message waiting line card at the MDF using a wiring plan similar to that
used for trunk cards. A typical connection example is shown in
Figure 139
"Analog message waiting line card - typical cross connection example"
(page 563)
, and Table 227 "Analog message waiting line card - backplane
pinouts" (page 561) shows the I/O pin designations at the backplane
connector. This connector is arranged as an 80-row by 2-column array of
pins. Normally, these pin positions are cabled to 50-pin connectors at the
I/O panel in the rear of each module for connection with 25-pair cables to
the cross-connect terminal.
The information in Table 227 "Analog message waiting line card - backplane
pinouts" (page 561) is provided as a reference and diagnostic aid at the
backplane, since the cabling arrangement may vary at theI/O panel. See
Communication Server 1000M and Meridian 1 Large System Installation and
Configuration (NN43021-310) for cable pinout information at the I/O panel.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.