[Asterisk-Users] Re: Meetme and Sipura SPA-941 -badjitter/distortion

[Dan Austin]

> It might be.  I'm going to work with one of the remote users again
tomorrow
> to see if we can get it working better.  You're also right that the
PSTN
> calls don't hear the echo, INSTEAD I hear a faint "static/waves on a
beach"
> sound whenever I talk though a PSTN set through the system to this
user.
> Pushing the packet size back to .03 makes direct calls better, but
then
> MeetMe goes screwy again.  ARG!  :-)


> Anyone have experience with the mentioned fix at:
> http://bugs.digium.com/view.php?id=5374 and Asterisk 1.2?  Does it
make call
> quality difference with SIP?  I read the whole thing thinking it was
going
> to end up saying this was a 1.2 feature, but looks like it got pushed
to
> 1.3.  Thoughts?

That patch and bug does help quite a few scenarios, but they won't help
with this problem.  MeetMe strictly assumes 20ms audio in 1.2.0.
Earlier
releases would and could process larger payloads, but the method used
was identified as a source of increasing delay.  The buffering used in
1.2.0 to send and receive audio packets from the zaptel mixing engine
now drops anything past the initial 20ms.

Check out http://bugs.digium.com/view.php?id=5697 for one possible
fix.

Dan