
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
Table 163: Analog message waiting line card - frequency response
page 371 are measured relative to the loss at 1 kHz.
Table 163: Analog message waiting line card - frequency response
Frequency (Hz)
Minimum (dB)
Maximum (dB)
60
20.0
-
200
0.0
5.0
300
–0.5
1.0
3000
–0.5
1.0
3200
–0.5
1.5
3400
0.0
3.0
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
on page 371
provides a technical summary of the analog message waiting line card.
Table 164: NT8D09 Analog Message Waiting Line card technical summary
Impedance
600 ohms
Loop limit (excluding
telephone)
1000 ohms at nominal -48 V (excluding telephone)
Leakage resistance
30,000 ohms
Ring trip
During silent or ringing intervals
Ringing voltage
86 V AC
Signaling
Loop start
Supervision
Normal battery conditions are continuously applied
(approximately -44.5 V on ring and -2.5 V on tip at nominal
-48 V battery)
Power input from backplane
-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.
Insertion loss
6 dB + 1 dB at 1020 Hz
3.5 dB loss for analog to PCM
Functional description
Circuit Card Reference
July 2011 371
Summary of Contents for 1000 Series
Page 1: ...Circuit Card Reference Nortel Communication Server 1000 7 0 NN43001 311 04 04 July 2011 ...
Page 20: ...20 Circuit Card Reference July 2011 ...
Page 30: ...Introduction 30 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 116: ...Option settings 116 Circuit Card Reference July 2011 Comments infodev avaya com ...
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Page 287: ...Figure 86 Clock Controller Option 3 Operation Circuit Card Reference July 2011 287 ...
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Page 462: ...NT8D15 E and M Trunk card 462 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 500: ...NTAK09 1 5 Mb DTI PRI card 500 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 512: ...NTAK10 2 0 Mb DTI card 512 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 534: ...NTAK79 2 0 Mb PRI card 534 Circuit Card Reference July 2011 Comments infodev avaya com ...
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