Same thing has happened to me many a time. AMI/B8ZS misconfigures are so common it is the first thing I expect when errors suddenly occur. Of course they say "no problem found" and miracously the ...

I have a T1 terminated on an Adtran Netvanta 3200. This circuit is flapping regularly - I count 20+ loss of frame events in the last hour. The ISP tells me that the LEC/telco is testing clean up to ...