Patent ID: 7697564

Claim:
A method for Digital Subscriber Line (DSL) handshaking, the method comprises: transmitting, by a remote DSL transceiver, first signals containing even numbered carriers for a predetermined period of time to initiate the DSL handshaking to produce R-ETONES-REQ, wherein the first signals comprise a plurality of even numbered carriers eight through thirty and include periodic phase reversal; detecting, by a central office DSL transceiver, the R-ETONES-REQ to produce detected R-ETONES-REQ; determining, by the central office DSL transceiver, alignment of a hyperframe in accordance with a Time Compression Multiplexing-Integrated Service Digital Network (TCM-ISDN) Timing Reference (TTR); transmitting, by the central office DSL transceiver, first response signals containing odd numbered carriers in accordance with the alignment of the hyperframe to produce C-TONES-TTR, wherein the first response signals comprise odd numbered carriers five through thirty-one and include periodic phase reversal; acquiring, by the remote DSL transceiver, TTR synchronization in accordance with the C-TONES-TTR; upon acquiring TTR synchronization, transmitting, by the remote DSL transceiver, second signals containing even numbered carriers to produce R-TONE-TTR; in response to the R-TONE-TTR, transmitting, by the central office DSL transceiver, second response signals containing odd numbered carriers to produce C-GALF 1 -TTR; in response to the C-GALF 1 -TTR, transmitting, by the remote DSL transceiver, third signals containing even numbered carriers to produce R-FLAG 1 -TTR; and in response to the R-FLAG 1 -TTR, transmitting, by the central office DSL transceiver, third response signals containing odd numbered carriers to produce C-FLAG 1 .