Nortel Networks Circuit Card 311 - Manual (Page 536)

536 NT8D09 Analog Message Waiting Line card
Cards later than vintage NT8D09AK support
µ
-Law and A-Law companding,
and provide a 2 dB transmission profile change. The transmission change
improves performance on long lines, particularly for lines used outside of a
single-building environment.
The NT8D09 Analog Message Waiting Line card supports 56K modem
operation.
CAUTION
Damage to Equipment
If a modem is connected to a port on the message waiting line
card, do not define that port in software (LD 10) as having message
waiting capabilities. Otherwise, the modem gets damaged.
The NT8D09 Analog Message Waiting Line card interfaces to and is
compatible with the equipment listed in
Table 208 "NT8D09 Analog Message
Waiting Line card application and compatibility" (page 536) .
Table 208
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
The NT8D09 Analog Message Waiting Line Card is an Intelligent Peripheral
Equipment (IPE) line card that can be installed in the NT8D37 IPE module.
Up to 16 cards are supported.
The analog message waiting line card provides talk battery and signaling
for up to 16 regular 2-wire common battery analog (500/2500-type)
telephones and key telephone equipment. The card 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. This voltage is
provided by the NT6D40 Peripheral Equipment Power Supply, DC.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.