Generation of encrypted speech messages for digital mobile communications system contg. transcoder

摘要

A communication is sent from a source communications unit (101() to a target or destination communications unit (102) in a radio communications system (100) that includes a data path (111) for the exchange of communications and a control path (124) for simplifying the exchange along the data path. The transcoding mode has a transcoder (115) and this can be by-passed (127,129) when the request to the control path is of a certain type.