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Technical summary

Analog line interface

Input impedance
The impedance at tip and ring is 600 Ohm with a return loss of
20
dB
for
200-500
Hz
26
dl3
for 500-3400 Hz
Insertion loss
On a station line-to-line connection, the total insertion loss at 1 KHz is 6dB
+
1dB. This is arranged as
3SdB
loss for analog to PCM and 2.5dB loss for
PCM to analog.
Frequency response
The loss values in the table below are measured relative to the loss at 1
KHz:
Table 2
Frequency response
Frequency Minimum Maximum
60 Hz 20.0
dB
200 Hz 0.0
dB
5.0
dB
300 Hz -0.5
dB
l.OdB
3000 Hz -0.5
dB
l.OdB
3200 Hz -0.5
dB
1.5
dB
3400 Hz 0.0
dB
3.0
dB
Analog message waiting line card description 553-3001-l 63