Nortel Networks 311 User Manual

Sender and receiver mode

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.

accepted:
rejected:

-5 to -31.5 dBmONew CCITT spec.
-38.5 dBmOBlue Book

accepted:
rejected:

fc +/- 10 Hz
fc +/- 60 Hz

accepted:

difference of 5 dB between adjacent frequencies
difference of 7 dB between non-adjacent frequencies

Norwegian requirement
rejected:

difference of 12 dB (for unloaded CO trunks)
difference of 20 dB between any two frequencies

Operating time:

< 32 msec.

Release time:

< 32 msec.

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

and

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.

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311

01.04

Standard

Release 5.0

23 May 2008

Copyright © 2003-2008, Nortel Networks

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