Avaya Nortel Communication Server 1000 Reference page 371

Insertion loss
On a station line-to-line connection, the total insertion loss at 1 kHz is 6 dB + 1 dB. This is
arranged as 3.5 dB loss for analog to PCM, and 2.5 dB loss for PCM to analog.
Frequency response
The loss values in
page 371 are measured relative to the loss at 1 kHz.
Table 163: Analog message waiting line card - frequency response
Frequency (Hz)
Message channel noise
The message channel noise C-weighted (dBrnC) on 95 percent of the connections (line to line)
with both ends terminated in 600 ohms does not exceed 20 dBrnC.
Table 164: NT8D09 Analog Message Waiting Line card technical summary
provides a technical summary of the analog message waiting line card.
Table 164: NT8D09 Analog Message Waiting Line card technical summary
Impedance
Loop limit (excluding
telephone)
Leakage resistance
Ring trip
Ringing voltage
Signaling
Supervision
Power input from backplane
Insertion loss
Circuit Card Reference
Table 163: Analog message waiting line card - frequency response
60
200
300
3000
3200
3400
600 ohms
1000 ohms at nominal -48 V (excluding telephone)
30,000 ohms
During silent or ringing intervals
86 V AC
Loop start
Normal battery conditions are continuously applied
(approximately -44.5 V on ring and -2.5 V on tip at nominal
-48 V battery)
-48 (can be as low as -42 for DC-powered systems), +15,
-15, +8.5 V and ringing voltage; also -150 V on analog
message waiting line card.
6 dB + 1 dB at 1020 Hz
3.5 dB loss for analog to PCM
Minimum (dB)
20.0
0.0
–0.5
–0.5
–0.5
0.0
Functional description
Maximum (dB)
-
5.0
1.0
1.0
1.5
3.0
on page 371
July 2011
on
371