We have cisco 2503 routers deployed in all of our bank branches. There's to 
serial ports and one BRIO (ISDN Dial-up port).

The serial port connects to a 56kb frame relay link. So a normal status of the 
router should show serial port up and BRIO down. When the 56kb link goes down 
the BRIO should dial-up to get the branch back online.

I need help with writing a rule set that will cover the above scenerio. Any 
help would be much appreciated, since I'm very green at writing rule sets.