Establishing stereo telephone connection - using integrated digital communication system for coualing two useful data channels and signalling channel

摘要

The method is designed for several persons sharing a connection or line and two data channels and a signalising channel are available in the integrated communication system. Stereo telephone equipment (SFA,SFB) with access to both data channels (B1,B2) is provided. For each channel, a speaking unit (FE1,FE2) with its own microphone (M1,M2) and loudspeakers (L1,L2) is provided. During communications along the data channel, synchronising recognition signs are transmitted at the start. At regular intervals phase comparisons are made. USE/ADVANTAGE - Several people can be connected, i.e. suitable for conferences.