[asterisk-bugs] [JIRA] (ASTERISK-20284) The DIAL application does not cause asterisk to start reading packets if we have sent a "Session Progress" and the other end has sent a Re-INVITE.

[Joshua Colp (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-20284?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joshua Colp updated ASTERISK-20284:
-----------------------------------

    Assignee:     (was: John Covert)

> The DIAL application does not cause asterisk to start reading packets if we have sent a "Session Progress" and the other end has sent a Re-INVITE.
> --------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: ASTERISK-20284
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20284
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/Interoperability
>    Affects Versions: 10.6.1, 10.7.0, 13.18.4
>         Environment: Mac OS X 10.4.11 PowerPC
>            Reporter: John Covert
>         Attachments: ReinviteBug.txt, TraceAndLog-20284.tar.gz
>
>
> If the SIP channel has sent a "Session Progress" and the other end has sent a Re-INVITE, when the call is answered in the Dial application, one-way transmission results.
> Given the following dialplan:
> [inbound]
> exten => _X!,1,Dial(SIP/x28,120,m(5xbring))
> or
> exten => _X!,1,Progress
> exten => _X!,n,Playback(pls-wait,noanswer)
> exten => _X!,n,Dial(SIP/x28)
> All works fine as long as the calling SIP endpoint does not issue a Re-INVITE.
> However, if the calling system (also Asterisk 10.7.0) issues a Re-INVITE, the calling party can hear the called party, but the called party cannot hear the caller.
> A SIP trace (attached) shows that the SIP dialogue is correct.
> The tcpdump output shows that the calling party's packets are arriving at the interface.
> An RTP trace shows that Asterisk is not reading the incoming packets.
> A unacceptable workaround is to "Answer" the call before issuing the Dial command; this, of course, is bad because it provides a false answer condition on the trunk.



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