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Configuring ISDN

Configuring ISDN on a router involves setting up a number of global and interface commands. Some are mandatory, and some are optional. The "Scenarios" section discusses both kinds.

Typical tasks are as follows:

• Global parameters (mandatory) Specify the switch type used by the CO. They set up static routes to various ISDN destinations and select conditions for initiating an ISDN call, such as interesting traffic.

• Interface parameters (mandatory) Configure interface options, assign the interface to a dialer group, and map ISDN calls to the appropriate destinations.

• Other parameters (optional) Include idle timers and response times to a call.

Most of these tasks aren't arranged in that particular order. You will probably go back and forth between configuration modes while setting up your ISDN.

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