Nortel Networks Circuit Card 311 - Manual (Page 369)

Sender and receiver mode 369
Table 165
XMFC sender specifications
Forward frequencies in DOD mode: 1380, 1500, 1620, 1740, 1860, 1980 Hz
Backward frequencies in DOD mode: 1140, 1020, 900, 780, 660, 540 Hz
Frequency tolerance: +/- 0.5 Hz from nominal
Power level at each frequency: Selectable: 1 of 16 levels
Level difference between frequencies: < 0.5 dB
Harmonic Distortion and Intermodulation 37 dB below level of 1 signaling frequency
Time interval between start of 2 tones: 125 usec.
Time interval between stop of 2 tones: 125 usec.
Table 166
XMFC receiver specifications
Input sensitivity:
accepted:
rejected: -5 to -31.5 dBmONew CCITT spec.
-38.5 dBmOBlue Book
Bandwidth twist:
accepted:
rejected: fc +/- 10 Hz
fc +/- 60 Hz
Amplitude twist:
accepted: difference of 5 dB between adjacent frequencies
difference of 7 dB between non-adjacent frequencies
Norwegian requirement
rejected: difference of 12 dB (for unloaded CO trunks)
difference of 20 dB between any two frequencies
Operating time: < 32 msec.
Release time: < 32 msec.
Tone Interrupt no release: < 8 msec. Receiver on, while tone missing
Longest Input tone ignored: < 8 msec. Combination of valid frequencies
Noise rejection: S/N > 18 dB No degradation, in band white noise
S/N > 13 dB Out-of-band disturbances for CCITT
XMFE sender and receiver specifications
Table 167 "XMFE sender specifications" (page 370) and Table 168
"XMFE receiver specifications" (page 370) provide the operating
requirements for the XMFC/MFE card when it is configured as an XMFE
card. These requirements conform to French Socotel specifications
ST/PAA/CLC/CER/692.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
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