Nortel Networks 1000 - Manual (Page 469)

Electrical specifications 469
Table 191
NT8D09 Analog Message Waiting Line Card technical summary (cont’d.)
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,
2.5 dB loss for PCM to analog
Frequency response
The loss values in Table 192 "Analog message waiting line card -
frequency response" (page 469) are measured relative to the loss at 1
kHz.
Table 192
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
Power requirements
Table 193 "Power requirements" (page 469) provides the power
requirements for the NT8D09 Analog Message Waiting Line card.
Table 193
Power requirements
Voltage
(+/-)
Tolerance
Idle
current Active
current
Max
+ 12.0 V dc 0.36 V dc 48 mA 0 mA 48
mA
+ 8.0 V dc 0.40 V dc 150 mA 8 mA 280
mA
–48.0 V dc 2.00 V dc 48 mA 40 mA 688
mA
Note 1: Each active ringing relay requires 10 mA of battery voltage.
Note 2: Reflects the current for ringing a single station set (or DN telephone).
There may be as many as five ringers on each line.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.