4 Summary
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
conkction,
the total insertion loss at 1 KHz is 6dB
+
1dB. This is arranged as 3.5dB 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
dl3
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 1.5dB
3400
Hz
0.0 dB
3.0
dB
_-
Analog line card description 553-3001-l 61