System is MICS w\6.1 XC software running 22 channels on a T-1 thru a DTI card.

Channels/trunks 1-5 are set as DID, 6 & 7 set as E & M, 8-22 are set as loop start. Outgoing voice calls are on channels 6-12 in line pool A.

I'm getting the following errors:
EVT 820-041112
EVT 820-000502
EVT 820-010502

The manual says event 820 is a "Line driver problem". Can anyone shed more light on this problem as to what it really means and possible causes\solutions? :shrug:

Any help would be greatly appreciated. Thanks.

The problem with the world is that the intelligent people are full of doubts, while the stupid ones are full of confidence - Charles Bukowski