[Asterisk-Users] audio delay over time on Zap to SIP

[mattf]

I already have one unanswered ticket open with them right now, guess I'll
call them on this one.

I had one of the 410's with the sync problem and this is very different from
that.

One more piece of information to confuse things. I have been in on 5 meetme
conferences this morning with a Zap channel a Sipura phone and a Grandstream
phone on both servers. And on the 405 server I can actually hear the delay
happening to the Sipura through the Grandstream, and it won't happen on the
400 server.

And yes the Sipura's have the same firmware(I've tried upgrading that too).
And the time that the delay starts is random, some time between 5 minutes
and a half hour. It seems to happen faster when the system is under heavy
load.

I'm going to try swapping motherboards tonight if I can't figure this out.

Thanks,

MATT---



-----Original Message-----
From: Scott Stingel [mailto:scott at evtmedia.com]
Sent: Friday, July 30, 2004 10:54 AM
To: asterisk-users at lists.digium.com
Subject: RE: [Asterisk-Users] audio delay over time on Zap to SIP


Matt-

Just checking:  have you contacted Digium about this problem?  I know in the
past Mark S  referred (on the bug list) to a firmware bug that caused frame
sync problems in T1 mode.  The problem was with the TE410P, not the TE405P,
and was back in Feb, but who knows?

I'm not sure where you're located, but I have found that a telephone call to
Digium works better than email for things like this.

Regards
Scott 


Scott M. Stingel
President,
Emerging Voice Technology, Inc.
Palo Alto California & London England
www.evtmedia.com 

-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of mattf
Sent: Friday, July 30, 2004 7:44 AM
To: 'asterisk-users at lists.digium.com'
Subject: [Asterisk-Users] audio delay over time on Zap to SIP

Hello,

We have one production server that is identically configured to another
production server except for the fact that they each use a different type of
digium quad T1 card(one has T400P and one has TE405P).

The server with the 405 has been developing delay problems with Sipura
SPA-2000 phone adapters after a call has gone on for 15-30 minutes (up to 1
second audio delay). I asked Sipura and they say their adapters have a
non-configurable jitter buffer of upto 1 second and that the Sipura is not
the cause of the problem.

The server with the 400 has identical hardware/network card/Slackware
9.1/Asterisk CVS 2004-07-28/on the same network and has no delay problems
with Sipura adapters whatsoever.

I have completely wiped the 405 server twice and replaced the network card
and the delay always comes back. I am hoping it isn't the 405 card, but
that's the only thing that's different from one server to the other.

Does anyone have any suggestions?

Thanks,

MATT---
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