Nortel Circuit Card 311 Reference page 845

STP(ST')
ST2P(ST")
ST3P(ST")
XMFR receiver specifications
Table 334 "XMFR receiver specifications" (page 845)
requirements for the NTAG26 circuit card.
Table 334
XMFR receiver specifications
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:
Noise Rejection:
Error Rate in White Noise
Copyright © 2003-2008, Nortel Networks
.
Digit
9
0
KP
ST
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
Better than: < 1/2500 calls
Test:
10 digit calls
nominal frequency @ -23 dBmO
ON/OFF = 50 ms/50ms
KP duration 100 ms
SNR = -20 dB
all digits
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
MF signaling 845
Backward direction
DOD-Tx, DID-Rx
1100 Hz + 1500 Hz
1300 Hz + 1500 Hz
1100 Hz + 1700 Hz
1500 Hz + 1700 Hz
900 Hz + 1700 Hz
1300 Hz + 1700 Hz
700 Hz + 1700 Hz
provides the operating