| 摘要 |
The invention defines a method for providing an xDSL broadband transmission service between a central office and a customer premises equipment which comprises the steps: initiating a handshaking procedure between the central office and the customer premises equipment, determining an xDSL transmission standard for providing the xDSL broadband transmission service, utilizing a non standard information field during the handshaking procedure to indicate a support of a safeguard mode between the central office and the customer premises equipment, and initiating the safeguard mode, in case no synchronization is established or synchronization is lost between the central office and the customer premises equipment after the handshaking procedure. |
