Abstract: Known ADPCM transcoders use processors for coding and decoding, which are time and power consuming. Such a known ADPCM transcoder comprising one processor for coding and decoding can handle four channels, while according to DECT twelve channels need to be available, which requires three known ADPCM transcoders. By delaying signals in an ADPCM transcoder, it is no longer necessary to use processors, but, instead of said processors, logic elements can be used, which is very advantageous, because of such an ADPCM transcoder being able to handle sixteen channels.

Abstract: Time-division switch under the control of a control arrangement in which at least one processor (3) and a clock (4) are associated and including a data bus (5) operation of which is time-shared between equipment access modules (2A to 2E) which are connected to said data bus. Each unit is provided with two content-addressable memories (6A to 6E, 7A to 7E) which are dynamically programmed by the control arrangement to send and to receive data with different frame structures during time slots the number and temporal positions of which are defined by said control arrangement on the data bus and on a particular time-division multiplex link (1A to 1E) linking the relevant equipment access module to the item of equipment it serves.