| 摘要 |
A multi-mode modem for xDSL communication is disclosed. At startup, a initialization procedure is carried out to determine the capability of the remote terminal. To this purpose, initialization signals are transmitted from a central terminal and a remote terminal, which comprise identification fields, that identify the used modulation or a country code. If the remote terminal is not able to communicate according to the invention, a fallback procedure to a legacy communication mode is carried out. The transmission carriers are chosen to minimize the interference with other systems. <IMAGE> |
