My vendor isn't alot of help. I've notified them last week, still positive response. The vendor's tech knows less than I do, God bless him. This opt 11 works off an 81 in our data center. We had a change in service this past month, we "upgraded" to Ethernet from ATM. That's when the problem started. We've checked and re-checked the Cisco 2851, which emulates the D channel to the opt 11.
We've changed out the front-end 2851 at the data center and the campus, the next thing is testing the fiber and the new jumpers added. Thanks for the help.