Nortel Networks 553-3001-211 Manual Do Utilizador

 NT5K21 XMFC/MFE card

Tables 140 and  Table 141 on 

 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

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.