[asterisk-bugs] [JIRA] (ASTERISK-28661) chan_iax jitterbuffer growing when time sources not in sync

[Kevin Harwell (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-28661?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=249089#comment-249089 ] 

Kevin Harwell commented on ASTERISK-28661:
------------------------------------------

Please post the output from
{noformat}
*CLI> iax2 show channels
{noformat}
As well please enable general debugging[1] in the Asterisk log (at least level 2), iax debugging, and jitterbuffer debugging. Jitterbuffer debugging can be enabled by issuing the following on the CLI:
{noformat}
*CLI> iax2 set debug jb on
{noformat}
Note you can disable the jitterbuffer debugging using the following:
{noformat}
*CLI> iax2 set debug jb off
{noformat}
Then attach the full Asterisk log to this issue.

Also please attach your _iax.conf_, or at least the relevant portions from it.

[1] https://wiki.asterisk.org/wiki/display/AST/Collecting+Debug+Information

Thanks!



> chan_iax jitterbuffer growing when time sources not in sync
> -----------------------------------------------------------
>
>                 Key: ASTERISK-28661
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-28661
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_iax2
>    Affects Versions: 16.4.0
>            Reporter: Kirsty Tyerman
>
> I have two asterisk servers, Server A and Server B. These two servers are peered via IAX. When I make a call between Server A and Server B I am experiencing poor audio quality and the jitter buffer on one end is continuously growing. 
> Server A's time is approximatley 10 minutes behind Server B.
> I have a PJSIP client registered to Server B call a PJSIP client registered to Server A. The call is established via IAX between Server A and Server B.
> I have the IAX jitter buffers enabled on both Server A and Server B with trunktimestamps=yes.
> When I establish the call, the "iax2 show channels" on Server A (date is behind) shows the "JitBuf" constantly growing. The max jitter buffer is 4000ms. It seems as though the jitter buffer is not handling the system clock being wrong when it should rely on the trunk timestamps that is relative to iax and disregard any system clocks.



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