The central character of circuit for telecommunication of time multiplex telephone central mainly - PCM lines whose channels are time multiplex time in part to call D.And information and in part for the transmission of information of sinalizacao

摘要

At an output (d) of a space-division/time-division multiplexer (A), an additional time-division multiplexer (B) is connected with its input (b1), the output (b2) of which is connected to an input (g) of the space-division/time-division multiplexer (A). The additional time-division multiplexer (B) operates with a circulating cycle which corresponds to one superframe. It is used for switching the partial signalling information. IMAGE