Nortel Networks Circuit Card 311 - Manual (Page 549)

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 Table 212 "Analog message waiting line card - frequency
response" (page 549) are measured relative to the loss at 1 kHz.
Table 212
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 Table 214 "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 23 May 2008
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