Nortel Circuit Card Installation Manual page 375

Table 144
XMFC receiver specifications (Part 2 of 2)
Tone Interrupt no release:
Longest Input tone ignored:
Noise rejection:
XMFE sender and receiver specifications
Table 145
XMFE sender specifications
Forward frequencies in OG mode:
Forward frequencies in IC mode:
Frequency tolerance:
Power level at each frequency:
Level tolerance:
Harmonic Distortion and Intermodulation:
Time interval between start of 2 tones:
Time interval between stop of 2 tones:
< 8 msec. Receiver on, while tone missing
< 8 msec. Combination of valid frequencies
S/N > 18 dB No degradation, in band white noise
S/N > 13 dB Out-of-band disturbances for CCITT
Tables 145 and Table 146 on
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.
NT5K21 XMFC/MFE card
page 376 provide the operating requirements
700, 900, 1100, 1300, 1500 Hz
1900 Hz
+/- 0.25% from nominal
Selectable: 1 of 16 levels
+/- 1.0 dB
35 dB below level of 1 signaling frequency
125 usec.
125 usec.
Circuit Card
Page 375 of 906
Description and Installation