METHOD FOR COMMUNICATION OF DATA AND VOICE BETWEEN PRIVATE BRANCH OF EXCHANGES AND PRIVATE BRANCH OF EXCHANGE

摘要

PROBLEM TO BE SOLVED: To economically and easily conduct PHS extension telephone voice communication and enterprise PHS data communication via a high speed digital channel among private branch of exchanges.;SOLUTION: A high speed digital channel interface circuit 8 applies voice compensation to an analog voice signal and Mkbit/s voice data corresponding to a PHS slave set into Nkbit/s voice data (e.g. M=2N=64), applies speed expansion to speed compression Nkbit/s PIAFS system data in Mkbit/s band to Nkbit/s, and an Mkbit/s monitor control signal of its signal part only is speed-expanded into Nkbit/s and the data are time division multiplexed in the same time slot on the high speed digital channel.;COPYRIGHT: (C)2000,JPO