[Asterisk-Users] Frame slip on Wildcard TDM400P?

[Trent Tuggle]

Hello,

I have a question about frame slippage problems and how to resolve 
them; can anyone help?

I am using a Wildcard TDM400P to connect to analog phones, and placing 
IAX2 terminated calls to PSTN through VoicePulse Connect! service.

(I know they have problems, and frankly I'm moving my business 
elsewhere, but I don't yet have any other accounts, and it's unpleasant 
how few providers support LNP.)

Anyway, I recently started noticing frame slip problems. (loud, brief 
buzz, almost exactly every 6 seconds, on the dot.)  It only occurs when 
I am using the phone connected to my TDM card -- when I play music on 
hold, or use a SIP phone, there's no problem whatsoever!!

I don't have any other cards, and the system has been working well for 
many months (with occasional problems with VoicePulse Connect!) and 
this problem just started when I upgraded from 1.0.5 to 1.0.7.

Is there any possible problem introduced by the upgrade?  Is there some 
possible problem introduced with a misconfiguration somewhere on my 
side?    I'm not sure exactly how IAX2 and the TDM card interplay with 
the clock syncing that VoicePulse must maintain -- is it even possible 
that I'm causing the problem?

Much thanks in advance for any information, pointers, hints, or 
recommendations that anyone can provide!

-Trent Tuggle