DSL COMMUNICATION SYSTEM, DSL COMMUNICATION APPARATUS, AND DSL COMMUNICATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a DSL communication system whereby the information of an ISDL signal can be transmitted / received through even a DSL subscriber line without degrading communication quality.;SOLUTION: When receiving IDSL signals from IDSL ports 141, 241 via LTs 142, 242, CTs 143, 243 extract ping-pong frame signals from the received IDSL signals, store the signals to a transmission buffer of a RAM 13, integrate the ping-pong frame signals from the received IDSL signal stored in the transmission buffer into the DSL signals and transmit resulting signals via DSLs 151, 251 after the storage to the transmission buffer. When receiving the DSL signals from the DSL ports 151, 251, MODEMs 152, 252 separate the ping-pong frame signals from the received IDSL signals, superimpose the separated ping-pong frame signals on the IDSL signals in matching with a period equivalent to 400Hz and transmit the resulting signals via the IDSL ports 141, 241.;COPYRIGHT: (C)2004,JPO