method for rahmensynchronisierung the switching of a pcm time multiplex - telecommunications system.

摘要

The synchronisation control monitors the incoming serial data flow for periodic detection of each frame beginning word to detect the time frames for the information channels, with a control frame provided by the transmitted beginning bits for the start of each time frame. A correct binary combination is verified within a time slot which corresponds to the length of the control frame, with the bit positions of the detected frame beginning words being marked. The procedure is repeated until no more unmarked bit positions are left, with the exchange reception stage synchronised with the marked bit positions.