On 12.12.18 at 19:43 Joshua C. Colp wrote: > On Wed, Dec 12, 2018, at 12:31 PM, Michael Maier wrote: > > <snip> > >> >> The problem: The extension doesn't create a ringback locally, because >> it most probably expects it to >> be sent by the callee - but the callee doesn't send anything (not >> surprising, because there has been >> no SDP). >> >> Or should Asterisk create the ringback (Asterisk doesn't send any RTP >> package)? Or should the phone >> create the ringback itself because there is a 180 Ringing (even if it >> contains SDP)? >> >> I'm wondering: Why does Asterisk create a 183 to the extension >> containing SDP if the callee didn't >> provide any SDP? >> >> >> So many questions ... . Could somebody please shine some light on it? >> What's going wrong here? > > The core doesn't communicate whether progress includes media or not, so the > PJSIP channel driver (and even chan_sip) assumes media is there. What should > happen in chan_pjsip is that it would send inband ringing and not a 180 > Ringing with SDP, but that is not currently implemented and I don't think > this particularly interaction has come up before to cause it to be > implemented. I'd therefore suggest raising an issue[1] with the SIP trace.
https://issues.asterisk.org/jira/browse/ASTERISK-28208 Thanks, Michael -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- Check out the new Asterisk community forum at: https://community.asterisk.org/ New to Asterisk? Start here: https://wiki.asterisk.org/wiki/display/AST/Getting+Started asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
