Patent ID: 7406028

Claim:
A method of communicating data across a channel that experiences near-end cross talk (NEXT) interference and far-end cross talk (FEXT) interference in alternate intervals, the method comprising: determining N F , a number of bits per symbol usable in a FEXT-only mode of operation; determining N S , a number of bits per symbol usable in a single mode of operation; determining N F-LO , a number of bits per FEXT symbol usable in a reduced-carrier-number mode; determining N N-LO , a number of bits per NEXT symbol usable in the reduced-carrier number mode; combining N F-LO and N N-LO to determine whether a dual mode of operation in the reduced-carrier number mode provides a higher data rate than the data rates available in the FEXT-only mode and single mode; and configuring a modem to transmit using the mode having a highest data rate.