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

[Steve Kann]

Rich Adamson wrote:

>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..