3Com 10014299 manual Modem Function Provided by 3Com Routers, Modem Script

52 CONFIGURING MODEM

This chapter covers the following topics:

■Modem Function Provided by 3Com Routers

■Configuring a Modem

■Displaying and Debugging a Modem

■Modem Configuration Examples

■Troubleshooting

Modem Function Provided by 3Com Routers

Modem Script

To offer the optimal flexibility, 3Com routers provide the following modem management functions:

■Provide the scripts (modem script) for modem management to enable the user to better control the modems connected to the router. A modem script can be executed by the following two means:

■Executes a modem script directly through the script-stringcommand to initialize the modem or other configurations.

■Triggers the modem script with particular events, such as router startup, modem dial-in connection, and the start-chatcommand.

■Using the script along with the related commands can enhance the remote configuration function of router. If the asynchronous serial interface works in flow mode, the user can establish a remote connection to the interface through the dumb terminal or modem dialup, to configure and manage the router.

■Directly send AT commands to the modem via the serial interface for managing the modem.

■Interwork with the equipment of other equipment vendors. That is, the asynchronous serial interfaces of the participating parties are working in the flow mode and interconnected through modems.

■Provides rich debugging information for modem monitoring and maintenance.

3Com routers provide t modem scripts, which are mainly used for:

■Flexibly controlling the modems of different models. For example, using different initialization AT commands able to interoperate with 3Com routers.

■Implementing the interactive login to remote systems. Interactive negotiation of the scripts can enable the system enters different link states. For example, after the asynchronous serial interfaces on the two routers set up a connection through the modem, routers can negotiate the protocol to be encapsulated with the physical link and its operating parameters.