Entire trunk group resetting/dropping calls at 2 minute intervals

[josiecza]

I have a trunk group on an s8500 ess. One DS1 with 23 bearer channels. The trunks are on a PRI, b8zs, esf, Protocol version a. Currently using a TN464G with a integrated CSU. I have swapped the board and CSU. I am getting no errors on "list meas ds1 log" report, no errors or alarms on DS1 board, Trunks, Sig group, or Synch. All tests pass. Trunks show in service/idle. As I watch a real time trunk report on CMS I see that the trunks are dropping at 2 minute intervals like clock work. The time in CMS resets to zero seconds and 2 minutes it happens again. Any calls that are connected are dropped as well. Any Suggestions?

 

[mikeydidit]

Have you upgraded the firmware on the TN464GP. I would start their. I have been seeing a lot of problems that are being resolved with the firmware upgades.

"Wise men speak because they have something to say; Fools because they have to say something."
(Plato)

 

[josiecza]

Problem was resolved. After being told by the provider that it was not their issue, We had them put traces on the d channel. Turns out the d channel had been re-provisioned for NFAS while we were provisioned for FAS.