| 摘要 |
An application implemented at customer premises equipment automatically detects the network-layer protocol used at the head end of a DSL connection and configures the DSL modem driver for that protocol. The application sets the DSL modem driver to one of the possible protocols for the type (e.g., WAN or LAN) of driver being used and attempts to connect to a server at the head end. If a response is received from the head end, then the application reads the headers on the responsive message to determine whether the protocol at the head end is consistent with the protocol that the DSL modem is set to. If the protocols are consistent, then the settings are loaded onto the driver. If no response is received from the head end when the application attempts to connect to the server, then the application initiates a series of commands for the purpose of eliciting a response from the head end. If the protocol is not consistent or no response is elicited, then the DSL modem is set to another protocol, and the application again attempts to connect to the server at the head end. These steps are repeated until either the correct head-end network-layer protocol is found, or the possible protocols are exhausted.
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