[asterisk-bugs] [JIRA] (ASTERISK-30162) when chan_iax is used to relay calls, no ringing indication is played

[Asterisk Team (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-30162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=259822#comment-259822 ] 

Asterisk Team commented on ASTERISK-30162:
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> when chan_iax is used to relay calls, no ringing indication is played
> ---------------------------------------------------------------------
>
>                 Key: ASTERISK-30162
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-30162
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_iax2
>    Affects Versions: 18.13.0
>            Reporter: Jaco Kroon
>            Severity: Major
>
> simplest reproduction:
> d1 <= SIP => a1 <= IAX/2 => a2 <= SIP => d2.
> d1 sends INVITE to a1 (to connect with d2).
> a1 sends back 100 Trying.
> a1 sends IAX/2 call establishment to a2
> a2 acks this.
> a2 generates INVITE to d2.
> d2 responds with 100 Trying
> d2 sends 180 Ringing.
> a2 sends RINGING indication to a1.
> a1 drops RINGING indication.
> This seems to happen because at the time RINGING is sent, no media is established, and as such the frame is dropped due to no compatible media.
> Issue introduced by 1b62831f2cfe5dcaa519885dd96b645fc05728e7 (as far as I can tell).
> We do use IAX/2 Jitter Buffer, not sure if this happens without JB.
> https://gerrit.asterisk.org/c/asterisk/+/18689 was already generated.  This does solve the problem, however, as per feedback, the patch may well be incomplete.



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