Method and apparatus for converting time-division data signals received on an incoming trunk to time-division data signals of different format for transmission over an outgoing trunk

摘要

Methods and apparatus for converting time-division data signals received over an incoming trunk having v.sub.e channels into time- division data signals for transmission over an outgoing trunk having v. sub.s channels (where v.sub.s v.sub.e).PPThe device includes means for storing the data bits contained in each incoming frame; means for reading at an intermediate frequency f.sub.i, during read enable periods, the stored data bits corresponding to v.sub.e busy outgoing channels and for evenly distributing v.sub.s -v.sub.e free outgoing channels amongst the v.sub.e busy outgoing channels, during read inhibit periods; and means for transmitting at a frequency f.sub.s the data bits read at the intermediate frequency f.sub.i.PP This device may advantageously be used in PCM telephone exchanges.