Table of Contents
Advertisement
Ringing voltage
Signaling
Supervision
Power input from backplane
Insertion loss
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 217 "NT8D09 Analog Message Waiting Line Card technical summary"
(page 552)
Waiting Line Card.
Table 216
NT8D09 Analog Message Waiting Line Card technical summary
Impedance
Loop limit (excluding set)
Leakage resistance
Ring trip
Ringing voltage
Signaling
Supervision
Power input from
backplane
Insertion loss
Copyright © 2003-2008, Nortel Networks
.
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,
2.5 dB loss for PCM to analog
provides a technical summary of the NT8D09 Analog Message
600 ohms
1000 ohms at nominal -48 V (excluding set)
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,
2.5 dB loss for PCM to analog
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Electrical specifications 551
Advertisement
Table of Contents
