G250-DS1 PRI signalling group drops

[jtierney]

We have CM3.1.4 @ the core and 28_17 FW on the 250. The AT&T PRI D-channel drops randomly and we need to reset the embedded MM (resetting the D channel in ASA does not work)to restore service. This has happened on 2 GW's (we replaced it under warantee) and on FW from 26_31 and 27_27. Is there an ID'd issue with this hardware?

 

[nollski]

is the sync source set at the G250

 

[jtierney]

Call me Mr. Dumass. YES, it has been set for a while. I should have mentioned. Sorry.

 

[nollski]

Have you listed measurments to see if you are getting slips on that DS1

 

[jtierney]

Yep, but it only seems to crop up right before we lose the D channel.

 

[Mitch672]

sounds to me like it is AT&T, why would you think it's a problem with the gateway? I would call AT&T, and tell them to FIX their PRI

The "list measurements ds1 log 001v4" (or whatever mg/slot your MM710 is in) log should be enough to prove you are getting frame slips (or whatever) before the trouble begins.


Mitch

AVAYA Certified Expert

 

[jtierney]

I would usually completely agree with you. I have another PRI 15 miles away with the same service on a G350 w/o the same issues. When that one has issues, the worst I've had to do is busy/release the D channel. I wasn;t sure if anyone else out there had experienced similar issues specifially with the 250-ds1

 

[Mitch672]

what does the "list measurements" show? You can have 1 circuit with virtually no problems, yet have another one that is very unreliable... I still suspect AT&T is your issue.

Mitch

AVAYA Certified Expert

 

[jtierney]

I am running daily logs right now and am seeing some slips and a couple of misframes. They come in clusters and I want to get a 4-5 day spread to see if they there is a time of day correspondance. Again, I appreciate the thoughts and the bottom line for me was not really whether AT&T was the culprit..just that this embedded DS1 board is behaving differently when it DOES come time to implement busies/resets/etc than the TN464/767 or MM710's. Thanks again.