[asterisk-bugs] [JIRA] (ASTERISK-27994) PJSIP: Early media ringback not indicated after Progress()

[Asterisk Team (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-27994?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Asterisk Team updated ASTERISK-27994:
-------------------------------------

    Target Release Version/s: 17.0.0

> PJSIP: Early media ringback not indicated after Progress()
> ----------------------------------------------------------
>
>                 Key: ASTERISK-27994
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-27994
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_pjsip
>    Affects Versions: 13.22.0
>         Environment: Ubuntu 16.04 LTS, Asterisk 13.22.0, pjproject bundled 2.7.2
>            Reporter: Gregory Massel
>            Severity: Minor
>              Labels: pjsip
>      Target Release: 13.28.0, 16.5.0, 17.0.0
>
>         Attachments: inband_progress_no.pcap, inband_progress_no.png, inband_progress_yes.pcap, inband_progress_yes.png
>
>
> chan_pjsip doesn't handle early media correctly in all instances.
> Specifically, two issues:
> 1. When the endpoint is configured with "inband_progress = no" (default), chan_pjsip will act as chan_sip used to with progressinband=never, i.e. Even if a Progress() application is run, it will still NOT indicate ringing inband.
> e.g. Something like:
> exten => s,1,Progress()
> same => n,Playtones(!400*33/40,!0/40,!400*33/40,!0/40,!400*33/40,!0/500)
> same => n,Wait(0.25)
> same => n,StopPlayTones
> same => n,Dial(PJSIP/endpoint)
> If the dialled endpoint indicates ringing, the calling endpoint hears dead silence (after the initial tones). This is incorrect. The channel driver must provide inband ringing (despite inband_progress=no setting) because the Progress() application has been run and the media stream opened.
> chan_sip handles this correctly (if progressinband=no is set); chan_pjsip doesn't.
> 2. When the endpoint is configured with "inband_progress = yes" and the same dialplan is used, pjsip will issue TWO 183 messages to the calling endpoint, one when the Progress application is run and then a second when it receives a 180 from the dialled endpoint. This is also incorrect because, once an intial 183 has been sent and the media stream is open, no further 183 message should be sent.



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