NT5K21 XMFC/MFE card Page 363 of 894

Table 139

XMFC receiver specifications (Part 2 of 2)

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

Tables 140 and Table 141 on page 364 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.

Table 140

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.

 

 

Circuit Card Description and Installation

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Nortel Networks 553-3001-211 manual Xmfe sender and receiver specifications, Xmfc receiver specifications Part 2
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