How to cinfigure ISDN backup on 1841

[pgallacher]

How would I configure automatic ISDN backup on a 2841 if my T1 fails?

[thisisshanky]

There are many ways to do this. Depends on your scenario, whether you are connecting to Internet (then floating statics should work best), while if you have two locations between which your T1 and ISDN runs, then you can either use floating statics or use dialer watch.

Floating statics.

http://www.cisco.com/en/US/tech/tk801/tk133/technologies_configuration_example09186a0080093f7e.shtml

This link should cover almost every scenario - Dialer watch, profiles etc.

http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_configuration_guide_chapter09186a00800dc823.html