Activation of multiple xDSL modems with implicit channel probe

摘要

A communication apparatus at a remote location is connectable to a communication apparatus at a central location. The apparatus includes a negotiation data transmitter that transmits negotiation data to the communication apparatus at the central location. The negotiation data includes an identification field that includes at least modulation independent information, a standard information field that includes at least modulation dependent information, and a non-standard information field that includes information other than information associated with the identification field and information associated with the standard information field.