[asterisk-bugs] [JIRA] (ASTERISK-26333) Problems with Blind Transfer, PJSIP (Aastra 6869i)

[George Joseph (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-26333?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

George Joseph updated ASTERISK-26333:
-------------------------------------

    Target Release Version/s: 14.6.0

> Problems with Blind Transfer, PJSIP (Aastra 6869i)
> --------------------------------------------------
>
>                 Key: ASTERISK-26333
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26333
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: pjproject/pjsip
>            Reporter: Matthias Binder
>            Assignee: Unassigned
>      Target Release: 13.17.0, 14.6.0
>
>         Attachments: asterisk capture + 6869i syslog.zip, capture-asterisk-good-case-chansip.pcap, chan_pjsip2.JPG, chan_pjsip.JPG, chan_sip.JPG, patch-for-awesome-transfers.diff, syslog-good-cas-chansip.pcap
>
>
> Sangoma told me to open a issue in the asterisk tracker.
> We cannot do PJSIP Blind Transfers on the Mitel 6869i Phone.
> The Problem is already analysed by Mitel Support and they made a Statement about the problem and showed up a workaround for this problem.
> The asterisk pjsip needs to be changed to solve the Problem.
> http://community.freepbx.org/t/problems-with-blind-transfer-pjsip-aastra-6869i/34393/20
> {quote}
> HI there,
> After having a look at the sip traces I have come to the following conclusion:
> The Problem:
> The channel drivers CHAN_SIP and CHAN_PJSIP seem to implement the REFER method differently.
> -- CHAN_SIP responds the REFER with an "202 Accepted" followed by a "200 OK" in NOTIFY sip/frag body as soon as Asterisk knows that the user can be reached.
> https://issues.asterisk.org/jira/secure/attachment/54361/chan_sip.JPG
> -- On the other hand CHAN_PJSIP notifies all the progress details of the C user e.g. Trying, Ringing etc. It sends a "200 OK" ONLY if the called user answers the call.
> https://issues.asterisk.org/jira/secure/attachment/54360/chan_pjsip.JPG
> https://issues.asterisk.org/jira/secure/attachment/54362/chan_pjsip2.JPG
> This leads to the stated issue because in case of Blind Transfer, Mitel Phones expect a "200 OK" after REFER has been accepted. Otherwise the line is kept busy. This is by-design with no intension to change it at the moment.
> {quote}



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