Nortel Networks 553-3001-211 manual Xmfr receiver specifications

NTAG26 XMFR card Page 685 of 894

XMFR receiver specifications

Table 215 provides the operating requirements for the NTAG26 circuit card.

Table 215

XMFR receiver specifications (Part 1 of 3)

Coding:	Mu-Law
Input sensitivity:	must accept: 0 to -25 dBmO
	must reject: -35 to dBmO
Frequency sensitivity:	must accept: f +/- (1.5% + 5Hz)
Amplitude Twist:	must accept: difference of 6dB between frequencies
Signal Duration:	must accept: > 30 ms
	must reject: < 10 ms
KP Signal Duration:	must accept: > 55 ms
	may accept: > 30 ms
	must reject: < 10 ms
Signal Interruption Bridge:	must ignore: < 10 ms
Time Shift between 2 frequencies:	must accept: < 4 ms
(Envelop for start/stop)
Coincidence between 2 frequencies:	must reject: < 10 ms
Intersignal Pause:	must accept: > 25 ms
Maximum Dialling Speed:	must accept: 10 signals per second

Circuit Card Description and Installation