Patent ID: 7012954

Claim:
A communication apparatus selectively connectable to a central communication apparatus to perform a full duplex communication utilizing a Digital Subscriber Line (xDSL) modem, comprising: a communicator that transmits a plurality of Capability List Request (CLR) signals to the central communication apparatus, said plurality of CLR signals including a capabilities list of the communication apparatus, said plurality of CLR signals further requesting that the central communication apparatus transmit a capabilities list of the central communication apparatus to the communication apparatus; and said communicator transmitting acknowledge (ACK) signals when a plurality of Capability List (CL) signals, that include the capabilities list of the central communication apparatus, are received by the communication apparatus from the central communication apparatus, and thereafter transmitting to the central communication apparatus a plurality of Mode Select (MS) signals designating a particular communication mode, wherein first frequencies utilized by said plurality of CLR signals and said plurality of MS signals differ from second frequencies utilized by said plurality of signals, said plurality CLR signals carrying identical data with an identical timing but having different carrier frequencies, said plurality of MS signals carrying identical data with an identical timing but having different carrier frequencies.