>>NO SHUTDOWN would not bring Serial0 up. It is a WIC T1 that the router diagnostics indicated was OK. Will an interface come up and stay up if there is no signal?
>
>I think not. A signal must be detected. SHOW INTERFACE can help diagnose problems, but it is tricky to read the results!
>
>>Got the router back from Phoenix today. Got an image from Cisco earlier in the week. Monday I'll hook it all back up and use zModem to load the OS. Maybe then I can get it right!
>
>For a backup, I suggest you set up a TFTP (Trivial FTP) server - several free ones are available - and use COPY FLASH TFTP to make a backup copy, to a PC.
>
>We get our images erased frequently - students practice, you know - but were so far able to restore from another identical router (via a TFTP server).

Thanks for the pointers.