[Asterisk-Users] Re: IAX Inbound Sound Quality

[Brian Dingman]

The ironic thing here is that dtmf works fine for my VP Connect DID's.
Go Figure. Also outgoing call quality is perfectly fine in and out for
me. The ONLY issue I have is with incoming call's incoming audio not
being very crisp throughout the call. I had there regualr service with
this SAME number and did not have any issues like this. IMHO it looks
like the problem is on their end.


On Mon, 24 Jan 2005 09:57:51 -0500, Mark Eissler <mark at mixtur.com> wrote:
> 
> On Jan 22, 2005, at 10:49 PM, Michael Graves wrote:
> >
> > I notice that all four of my IAX2 based termination providers send
> > incomming calls in trunking mode. You can tells since the command IAX2
> > Show Registry reports all the connections to port 8617. This is
> > something that is determined at their end. In trunk mode I beleive that
> > the jitter buffer is not effective.
> >
> 
> IIRC the jitter buffer is currently broken in trunk mode and should be
> turned off.
> 
> http://www.voip-info.org/wiki-Asterisk+bandwidth+iax2
> 
> An alternative for testing is to set trunk=no in iax.conf. I've had to
> do that for my VPC trunks because I've also found that outbound faxing
> seems to be broken with trunking turned on (at least to VPC).
> 
> > FWIW, I had similar problems with VPC so I switched to Sixtel.net. No
> > such problems anymore.
> >
> 
> VPC must still be using quite a lot of custom code or routing their
> calls in some weird way because I've found two problems with them so
> far while using IAX2:
> 
> 1) The fax problem mentioned above.
> 
> 2) Inbound DTMF is quite broken. (They are working on a fix and said it
> would be at least 30 days...but then in December they said it would
> take 2 weeks...). What a drag.
> 
> -mark