COMMUNICATION SYSTEM USING DSL COEXISTENT WITH TCM-ISDN LINE AND FRAME SYNCHRONIZATION METHOD THEREOF

摘要

PURPOSE: A communication system using a DSL(Digital Subscriber Line) coexistent with a TCM(Time-Compression Multiplexing)-ISDN(Integrated Service Digital Network) line and a frame synchronization method thereof are provided to obtain the hyper-frame synchronization in an initialization process by using the DSL. CONSTITUTION: A communication system using a DSL coexistent with a TCM-ISDN line includes a demodulator, a buffer(623), and a frame synchronizer(626). The demodulator are used for converting signals within a time domain to signals within a frequency domain. The buffer(623) is used for receiving the signals through the DSL and providing the received signal to the demodulator along a frame boundary. The frame synchronizer(626) is used for determining the frame synchronization by using the phase information received from the demodulator. The frame synchronizer(626) changes the frame boundary when the frame synchronization is not completed.