Nortel Networks Circuit Card - Manual (Page 375)

NT5K21 XMFC/MFE card Page 375 of 906
Circuit Card Description and Installation
XMFE sender and receiver specifications
Tables 145 and Table 146 on page 376 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.
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
Table 145
XMFE sender specifications
Forward frequencies in OG mode: 700, 900, 1100, 1300, 1500 Hz
Forward frequencies in IC mode: 1900 Hz
Frequency tolerance: +/- 0.25% from nominal
Power level at each frequency: Selectable: 1 of 16 levels
Level tolerance: +/- 1.0 dB
Harmonic Distortion and Intermodulation: 35 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 2 of 2)