| abstract |
(57) [Summary] [PROBLEMS] To notify timing information for specifying a period affected by crosstalk from an adjacent line from a station side to a subscriber side. In A Digital subscriber line transmission (xDSL), during the training carried out prior to data communication, including timing information T 1 for specifying a period affected by crosstalk from the adjacent line to the training symbol sequence 500, the training The station apparatus notifies the subscriber unit of the symbol sequence. The phase of training symbol 501 changes (A → B) to insert the timing information T 1 into the training symbol sequence. |