CLOCK SYNCHRONIZATION METHOD FOR SYNCHRONOUS COMMUNICATION OF MODEM TO OPERATE COMPONENTS OF TRANSMITTING SIDE AND RECEIVING SIDE BY UNIQUE NETWORK SYNCHRONIZATION CLOCK WITHIN SYSTEM AND SYNCHRONOUS TRANSMISSION/RECEPTION APPARATUS USING THE SAME

摘要

Purpose: the synchronous communication of one modem of method for synchronizing time is arranged to carry out real time communication and by preventing a data delay phenomenon from preventing loss of data due to a low operation phenomenon using an identical synchronous transfer/reception device by the component of one transmitting side of a unique network synchronous clock operation and a reciever within a kind of system. Construction: identical clock is supplied to a coding/decoding unit (11) and a modem (12) for encoding and decoding transmission data. Modem encodes transmission data according to clock and transmits the data after coding by a PSTN (20). Clock is extracted from the data received after the coding by PSTN. Identical clock is supplied to a coding/decoding unit (31) and a modem (32) by using the clock of extraction.