Patent ID: 7418030

Claim:
A communication system, comprising: a first transceiver operable to communicate according to a digital subscriber line standard; and a second transceiver operable to communicate according to the digital subscriber line standard with the first transceiver, the first and the second transceivers operable to perform an initialization, including a handshake portion with a plurality of handshake meessages, a channel analysis portion, and a training portion, the first and second transceivers negotiating a plurality of iterations of the training portion, wherein each iteration of the training portion by the first transceiver includes a first signal sequence and a first message sequence the first signal sequence including a plurality of first signals, the first transceiver operable to adjust the length of at least some of the first signals and each iteration of the training portion by the second transceiver includes a second signal sequence and a second message sequence, the second signal sequence including a plurality of second signals, the second transceiver operable to adjust the length of at least some of the second signals and wherein a first handshake message identifies an initial value of a pseudo-random binary sequence, the initial value of the pseudo-random binary sequence being used to generate at least a part of the first signal sequence and the second signal sequence.