COMMUNICATION SYSTEM USING ISDN LINE

摘要

PROBLEM TO BE SOLVED: To send/receive data accurately even in the case of communication using pluralities of B channels at the same time by absorbing a difference in a propagation delay time among pluralities of the B channels. SOLUTION: The communication system connecting with an ISDN line 422 with pluralities of B channels is provided with a B channel data storage circuit 412 that stores reception data on the B channels of the ISDN line 422 and a data storage input output control circuit 416 that is a control means controlling the B channel data storage circuit 412 and transmits received data stored in the B channel data storage circuit 412 when identifying a head of the received data in a prescribed timing, and absorbs a difference in propagation delay between the received data from the B channel data storage circuit 412 and the received data from the other B channel and a changeover circuit 417 synthesizes them.