Modem signal detecting system for adaptive differential pcm...

Details Modem signal detecting system for adaptive differential pcm... Modem signal detecting system for adaptive differential pcm...

H - Electricity

04

M

379/2, 340/73

H04M 3/22 (2006.01) H04L 1/00 (2006.01) H04L 27/00 (2006.01)

Patent

CA 2029749

ABSTRACT OF THE DISCLOSURE A modem signal detecting system for an adaptive differential code modulation system, which is intended for detecting a modem training signal, comprises a comparison and decision circuit which receives an input signal from a signal power calculator and compares a signal power level during a silent period and a training period of a modem training signal. The comparison and decision circuit then decides whether or not the transmission quality of the transmission line is suitable for the modem communication.

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