Technical Summary; Analog Line Interface - Nortel Enterprise 1000 Reference Manual
Succession communication server, circuit card
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- Description, installation and operation manual (646 pages) ,
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Technical summary
Analog line interface
Succession Communication Server for Enterprise 1000 Circuit Card Reference Guide
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.
Analog line cards
Page 231 of 236
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