Resurrected 424 system, rehabed C/D processor, Rev 4.3. Mix and match of self programming, and consultant.
Consultant did *all* PRI programming. He is sure its solid. Separate programmer, separate company has looked at it as well, and agrees programming is solid.
Totally stumped. One card, works fine in each slot, with one active PRI in whole system.
Does not follow card. Both cards work fine when swapped.
Other PRI works fine, in either slot. See above, both cards work fine in either location.
when Both are active together, and the second PRI is unbusied out, (trunks re-activated etc), then either it takes no calls at all, or crashes the system althogether.
So far, we have brought a Bert Tester (2000 series with full PRI decoding), and the second PRI seems clean. We couldn't interrupt the working circuit during business hours, so that will have to wait to an after hours test.
Suspictions: The carrier, is "sharing" the D channel, across the two PRI's. We do have about 200 DID's active. They won't admit to it. Maybe its the DID's spread across both PRI's.
Another suspicion. The CLEC is taking circuits from the LEC, but between one of 4 hops, they are changing formats, and then resetting formats back again. Bit stuffing and Bit stripping, have (rumor has it) played hell with DK PRIs in the past. The carrier is in the Blame game at this point, so they won't admit to anything wrong on their end.
Suggestions appreciated...
Carrier is unfamiliar with the PRI card for the DK series.