A transmission system taking account of the requirements of the different kinds of traffic carried, and a corresponding transmitter and receiver

摘要

The system uses indicators accompanying data in transit to ensure priority to appropriate blocks. The transmission system comprises a transmitter (11) sending information which comprises both telephone blocks and data blocks to at least one receiver (13,14,15). The transmitter includes a selection system enabling transmission of telephone blocks when required to do so, but transmission of data blocks when telephone blocks are not available. Indicators are generated to accompany the flux of information indicating the type of data contained within each position of the data flux. The indicators comprise a succession of frames of identical length each comprising a useful load field, and a signalling field.