Nortel Networks Circuit Card - Manual (Page 374)

Page 374 of 906 NT5K21 XMFC/MFE card
553-3001-211 Standard 3.00 August 2005
XMFC sender and receiver specifications
Table 143 and Table 144 provide the operating requirements for the NT5K21
XMFC/MFE card. These specifications conform to CCITT R2
recommendations: Q.441, Q.442, Q.451, Q.454, and Q.455.
Table 143
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 144
XMFC receiver specifications (Part 1 of 2)
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:
Norwegian requirement
rejected:
difference of 5 dB between adjacent frequencies
difference of 7 dB between non-adjacent frequencies
difference of 12 dB (for unloaded CO trunks)
difference of 20 dB between any two frequencies
Operating time: < 32 msec.
Release time: < 32 msec.