This invention presents a multimode xDSL line card adaptive activation
method, comprising the following steps: A) A master controller is
installed and configured with multiple templates based on the modes of
operation supported by a line card, and forwards templates to said line
card; B) The line card receives templates forwarded by the master
controller and activates the line card communications chip; C) The
communications chip communicates with the remote CPE and decides on a
mode of operation according to a handshake protocol; D) The line card
employs a corresponding template according to the mode of operation
chosen in Step C, and practices circuit activation with the CPE. This
invention solves the existing problems in current multimode xDSL
technology of poor compatibility and inability to adapt effectively.