UNIVERSIAL SIGNAL TRANSCEIVING CIRCUIT

摘要

The R2/MFC(multi-frequency compelled)/DTMF(dual tone multi- frequency)/ CCT(continuity check tone) combined signal receiving circuit of common signal transmission-receiving circuit pack comprises: a digital signal processor (1) executing the signal detecting algorithm for detecting the signal data provided from the switch network; a low EP ROM (2) and a high EP ROM (3) recording the algorithm of the DSP (1); a clock generator (4) providing the operating clock; a reset logic (15) for resetting the DSP (1) by reset signal; a multiplexor transmitting the signal data provided from the switch network to DSP (1); a third state logic gate (7); an input RAM (8) receiving the operating mode information provided from controller.