> Hi Dale, > > I know they are, unfortunately, following the "wide" SIP standard. > > Since media is relayed though sipX, Media Relay, when > sipXBridge is used, I was wondering if it was possible to get > an event when first media arrives? This in not relevant for a > normal sipX deployment, but very relevant for us who have a > big application using sipX.
In the world of software anything is possible I guess but there are currently no existing hooks in any of the sipXecs components that would allow you to generate such an event today. > -----Original Message----- > From: WORLEY, Dale R (Dale) [mailto:dwor...@avaya.com] > Sent: 25 July 2010 10:30 > To: Sven Evensen; sipx-users@list.sipfoundry.org > Subject: RE: Never get 180 Ringing > > ________________________________________ > From: sipx-users-boun...@list.sipfoundry.org > [sipx-users-boun...@list.sipfoundry.org] On Behalf Of Sven > Evensen [sven.even...@onrelay.com] > > We are engaged with a large mobile operator and are using > there own SIP trunk infrastructure, a CS2K (with ISUP > interface to the PSTN) and ACME packet. > The problem is that their SIP trunk is configured to give 183 > with SDP immediately upon receiving the outgoing INVITE. > After that it is opened for early media, but we never get 180 > Ringing, only 200 OK when destination answers. Somewhere > between 183 and 200 media changes from silence to ring tone > (or announcement). > > We are dependant on receiving correct alerting notification > when destination is ringing. So the question is, can we in > sipX some how detect when the media stream starts (assuming > there is silence suppression)? > ________________________________________ > > Within the sipXecs architecture, the UAs are expected to > handle the media processing; the sipXecs processes handle > signaling but not media. > > Within the SIP standards, their behavior is correct -- the > far-end is not required to provide a 180 response before > proving early media or before the 200 response. Indeed, the > far-end need not provide *any* response before providing > early media. (Ugh.) > > So your UA will have to detect when the media stream starts. > > Dale > _______________________________________________ > sipx-users mailing list sipx-users@list.sipfoundry.org List > Archive: http://list.sipfoundry.org/archive/sipx-users > Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-users > sipXecs IP PBX -- http://www.sipfoundry.org/ > _______________________________________________ sipx-users mailing list sipx-users@list.sipfoundry.org List Archive: http://list.sipfoundry.org/archive/sipx-users Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-users sipXecs IP PBX -- http://www.sipfoundry.org/
