[Asterisk-Users] Distorted VM with iax2 with ilbc and jitterbuffer - bug?

[Rich Adamson]

> >Two asterisk boxes 150 miles apart, both cvs-head as of this morning
> >(and since Sept 27th), connected via iax2 with low-utilized ds3 internet,
> >C7960 calls exten on remote system (also C7960), and call goes to VM.
> >No other calls in either system (eg, no load).
> >
> >Both boxes have iax config'ed as:
> > trunk=yes
> > allow=ilbc
> > jitterbuffer=yes
> >Recorded VM messages are very distorted.
> >
> >Changing only jitterbuffer=no (and * restart), recorded VM messages are
> >very clean. With jitterbuffer=yes and trunk=no, messages are very clean.
> >
> >Both boxes config'ed as:
> > trunk=yes
> > allow=gsm
> > jitterbuffer=yes
> >Recorded VM messages are very clean.
> >
> >Conclusion: looks like the combination of trunk=yes and jitterbuffer=yes
> >with ilbc is causing the distorted VM messages. Normal answered calls
> >have no distortion.
> >
> >Is this an unacceptable iax config or does this represent a bug?
> >(Problem can be recreated at will and is very consistent.)
> >
>
> 
> Try using trunktimestamps as well..

That didn't help at all; exactly same distorted vm audio.

An example from the iax.conf looks like this:
[npi-out]
type=peer
username=coz-in                                                               
secret=mysecret                                                        
auth=plaintext                                              
host=1.2.3.4
trunk=yes
trunktimestamps=yes
jitterbuffer=yes
disallow=all
allow=ilbc

Note: using type=user and type=peer on both cvs-head systems. Normal
calls sound fine, but recorded vm messages are distorted.

Any other thoughts?

Rich