Patent ID: 6628664
Filing Date: 2003-09-30
Classification: H04M,H04Q

Abstract:
A telecommunications system comprising:an at least partially digital telephone link having an analog end portion; first and second modems disposed along the link; and analog/digital devices disposed along the link intermediate the modems which are operative to support communications between said first and second modems substantially at bit rates in excess of 28.8 Kbps; an analog signal interface operative to receive an analog signal representation of digital data from a transmission source associated with one of said first and second modems; a codec and a third modem, both arranged to receive said analog signal in parallel; a processor operative to receive digitized data from said third modem and provide said digitized data to a fourth modem; a selector operative to receive digitized data from either of said codec and said fourth modem and is operative to selectively provide either of: said digitized data received from said codec based on the absence of a modem training signal received at said third modem; and said digitized data received from said fourth modem based on the detection of a modem training signal received at said third modem; and digital transmission apparatus operative to digitally transmit said digitized data received from said selector, wherein said selector selectively provides said digitized data to said digital transmission apparatus based on at least one predefined selection criterion.