[Telepathy] [Bug 15770] New: Add a way to signal cancellation of a call

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=15770

           Summary: Add a way to signal cancellation of a call
           Product: Telepathy
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: telepathy-spec
        AssignedTo: telepathy at lists.freedesktop.org
        ReportedBy: sjoerd at luon.net


Some PBX systems can, on an incoming call, ring multiple extensions. When one
of the extensions picks up, the call to the others is cancelled. Extensions can
be softphones, in which case the cancellation is signaled to them (SIP has a
way to do this, jingle doesn't, don't know about others).

When this happens the UI is expected to not log such a call as a missed call.
Obviously to make this happen we need some way in telepathy to signal this. In
telepathy-sofiasip this is done by using the self-handle as actor in the
MembersChanged signal on the Media channel. Which is obviously far too subtle.

Maybe a Channel_Group_Change_Reason_Cancelled should be added?


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