DIGITAL-LINE INTERFACE DEVICE AND METHOD OF PABX

摘要

a voice channel time slot generating board (52) which generates the mode of the voice transmission; a voice and data channel time slot generating board (54) which generates the mode of the channel which transmits the voice and data simultaneously; a card recognition board (18) which recognizes the kind of card; a mode selection board (50) which selects the output of the voice channel time slot generating board, or the voice and data channel time slot generating board.