Nortel Networks 1000 - Manual (Page 452)

452 NT8D09 Analog Message Waiting Line card
The NT8D09 Analog Message Waiting Line Card is functionally identical to
the NT8D03 Analog Line Card, except it can also connect a high-voltage,
low-current feed to each line to light the message waiting lamp on
telephones equipped with the Message Waiting feature.
The NT8D09 Analog Message Waiting Line Card supports 56K modem
operation.
The NT8D09 Analog Message Waiting Line Card interfaces to and is
compatible with the equipment listed in
Table 183 "NT8D09 Analog
Message Waiting Line Card application and compatibility" (page 451) .
Table 184
NT8D09 Analog Message Waiting Line Card application and compatibility
Equipment Specifications
500-type rotary dial sets (or equivalent):
dial speed 8.0 to 12.5 pps
percent break 58 to 70%
interdigital time 150 ms
2500-type Digitone sets (or equivalent):
frequency accuracy + 1.5%
pulse duration 40 ms
interdigital time 40 ms
speed 12.5 digits/s
Physical description
The circuitry is mounted on a 31.75 cm. by 25.40 cm (12.5 in. by 10 in.)
printed circuit board.
The NT8D09 Analog Message Waiting Line card circuits connects to the
backplane through a 160-pin connector. The backplane is cabled to a
connector in the bottom of the cabinet which is cabled to the cross-connect
terminal (Main Distribution Frame) through 25-pair cables. Station
apparatus then connects to the card at the cross-connect terminal.
The faceplate of the NT8D09 Analog Message Waiting Line card is
equipped with a red LED which lights when the card is disabled (see
Figure 118 "Analog message waiting line card - faceplate" (page 453) .
At power-up, the LED flashes as the analog line card runs a self-test. If
the test completes successfully, the card is automatically enabled (if it is
configured in software) and the LED goes out.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.