Electrical specifications 549
Input impedance
The impedance at tip and ring is 600 ohms with a return loss of:
•20 dB for 200-500 Hz
•26 dB for 500-3400 Hz
Input impedance
The impedance at tip and ring is 600 ohms with a return loss of:
•20 dB for 200 – 500 Hz
•26 dB for 500 – 3400 Hz
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.
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.
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 Table212 "Analog message waiting line card - frequency
response" (page 549) are measured relative to the loss at 1 kHz.
Table212
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
Frequency response
The loss values in Table214 "NT8D09 Analog Message Waiting Line Card
frequency response" (page 550) are measured relative to the loss at 1 kHz.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23May 2008
Copyright© 2003-2008, Nor tel Networks
.