Patent ID: 8059704

Claim:
A digital subscriber line (DSL) transmitter adapted to be connected to a first loop in a cable bundle having a plurality of loops including a second loop supporting an active DSL loop communication, comprising: a control block operable to perform: a bit rate requirement operation configured to determine a required bit rate for the new DSL loop communication; a noise estimation operation configured to: identify a plurality of bandwidth options, each bandwidth option being associated with a different group of DMT subcarriers within and less than the total available number of DMT subcarriers which can carry the required bit rate; and calculate, for each one of the identified bandwidth options, a crosstalk noise effect of the new DSL loop communication with respect to the active DSL loop communication on the second loop if the new DSL loop communication were to use the different group of DMT subcarriers associated with the identified bandwidth option; and a noise minimization operation configured to choose one of the plurality of bandwidth options having a smallest calculated crosstalk noise effect with respect to the active DSL loop communication on the second loop; and a DSL signal generator operable to generate signals for the new DSL loop communication using the group of DMT subcarriers associated with the chosen one of the bandwidth options.