Nortel Circuit Card Installation Manual page 697

XMFR receiver specifications
Table 220
XMFR receiver specifications (Part 1 of 3)
Coding:
Input sensitivity:
Frequency sensitivity:
Amplitude Twist:
Signal Duration:
KP Signal Duration:
Signal Interruption Bridge:
Time Shift between 2 frequencies:
(Envelop for start/stop)
Coincidence between 2 frequencies:
Intersignal Pause:
Maximum Dialling Speed:
Table 220 provides the operating requirements for the NTAG26 circuit card.
NTAG26 XMFR card
Mu-Law
must accept: 0 to -25 dBmO
must reject: -35 to dBmO
must accept: f +/- (1.5% + 5Hz)
must accept: difference of 6dB between frequencies
must accept: > 30 ms
must reject: < 10 ms
must accept: > 55 ms
may accept: > 30 ms
must reject: < 10 ms
must ignore: < 10 ms
must accept: < 4 ms
must reject: < 10 ms
must accept: > 25 ms
must accept: 10 signals per second
Circuit Card
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Description and Installation