I have 2 DS'3 (channelized) coming into this box. no one changed anything on the router but with a remote site outage complaint, I called the telco and they fixed their problem,tested this DS-1 on this DS3 and ever since I've been showing an amber alarm and this trouble ""interface is up, line protocol is down(looped)"
The telco confirmed that they did not leave their loop up....HELP!!! I've restarted the interface etc. but nothing happens.