Hello Everyone, I would like to implement PTT using the pjsip stack; how can i do it? I want a software solution so muting/unmuting the mic is not in my options. Thank you. Paul Mungai, Software Engineer, Worked on Failed & Successful projects. Cell: +254-738-138556 | +254-716-444781 Blog: http://paulmungai.wordpress.com LinkedIn: http://www.linkedin.com/in/paulmungai Jay Leno <http://www.brainyquote.com/quotes/authors/j/jay_leno.html> - "Don't forget Mother's Day. Or as they call it in Beverly Hills, Dad's Third Wife Day."

Hi Paul, we have looked into this and tried both SIP based and RTPC based solution and the conclusions so far is that it must be based on RTCP otherwise you will get to long delays on floor control mechanism. The next step for us is to implement TBCP or similar to do this. Hopes this helps. Cheers / Olle _____ From: pjsip-bounces@lists.pjsip.org [mailto:pjsip-bounces@lists.pjsip.org] On Behalf Of Paul Mungai Sent: den 12 maj 2009 18:42 To: pjsip@lists.pjsip.org Subject: [pjsip] Push To Talk Implementation Hello Everyone, I would like to implement PTT using the pjsip stack; how can i do it? I want a software solution so muting/unmuting the mic is not in my options. Thank you. Paul Mungai, Software Engineer, Worked on Failed & Successful projects. Cell: +254-738-138556 | +254-716-444781 Blog: http://paulmungai.wordpress.com LinkedIn: http://www.linkedin.com/in/paulmungai Jay Leno <http://www.brainyquote.com/quotes/authors/j/jay_leno.html> - "Don't forget Mother's Day. Or as they call it in Beverly Hills, Dad's Third Wife Day."

TBCP messages are currently not supported by the PJMedia stack. I had a similar problem where i needed to use TBCP(RTCP APP) msgs for a similar kind of PTT application. So had to hack around by defining my own callbacks at the application level and letting the PJMedia stream layer call it after passing the needed PKT from the transport layer. Regards Manjeet --- On Tue, 5/12/09, Olle Frimanson <olle.frimanson@keystream.se> wrote: From: Olle Frimanson <olle.frimanson@keystream.se> Subject: Re: [pjsip] Push To Talk Implementation To: "'pjsip list'" <pjsip@lists.pjsip.org> Date: Tuesday, May 12, 2009, 11:40 PM Hi Paul, we have looked into this and tried both SIP based and RTPC based solution and the conclusions so far is that it must be based on RTCP otherwise you will get to long delays on floor control mechanism.   The next step for us is to implement TBCP or similar to do this.   Hopes this helps.   Cheers / Olle   From: pjsip-bounces@lists.pjsip.org [mailto:pjsip-bounces@lists.pjsip.org] On Behalf Of Paul Mungai Sent: den 12 maj 2009 18:42 To: pjsip@lists.pjsip.org Subject: [pjsip] Push To Talk Implementation   Hello Everyone, I would like to implement PTT using the pjsip stack; how can i do it? I want a software solution so muting/unmuting the mic is not in my options. Thank you. Paul Mungai, Software Engineer, Worked on Failed & Successful projects. Cell: +254-738-138556 | +254-716-444781 Blog: http://paulmungai.wordpress.com LinkedIn: http://www.linkedin.com/in/paulmungai Jay Leno  - "Don't forget Mother's Day. Or as they call it in Beverly Hills, Dad's Third Wife Day." _______________________________________________ Visit our blog: http://blog.pjsip.org pjsip mailing list pjsip@lists.pjsip.org http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org

Hi Paul & List, I've just implemented PTT/SQU over RTP for a client. The big advantaged are: * you can negotiate an additional dynamically numbered payload type through SDP (e.g 102/radio-event), just like RFC2833 DTMF is. That way you only send your events to peers that advertise it, and stay fully standard compliant and compatible to other SIP devices. * it's guaranteed to be in sync w/the voice data. * at 8kHz for G711 and some processing delays, you can stay well below 50ms end-to-end latency, which is usually good enough. RTCP isn't really that ideal I think... you have to attach your custom data to sender/receiver reports, which messes up the reporting intervals. I'll see if I can publish patches of the relevant changes in the media layer -- there wasn't much to do, really, i pretty much followed what's done for DTMF. hope that helps, Klaus On May 13, 2009, at 7:04 AM, manjeet wrote: > > TBCP messages are currently not supported by the PJMedia stack. I > had a similar problem where i needed to use TBCP(RTCP APP) msgs for > a similar kind of PTT application. So had to hack around by defining > my own callbacks at the application level and letting the PJMedia > stream layer call it after passing the needed PKT from the transport > layer. > > Regards > Manjeet > > > --- On Tue, 5/12/09, Olle Frimanson <olle.frimanson@keystream.se> > wrote: > From: Olle Frimanson <olle.frimanson@keystream.se> > Subject: Re: [pjsip] Push To Talk Implementation > To: "'pjsip list'" <pjsip@lists.pjsip.org> > Date: Tuesday, May 12, 2009, 11:40 PM > > Hi Paul, we have looked into this and tried both SIP based and RTPC > based solution and the conclusions so far is that it must be based > on RTCP otherwise you will get to long delays on floor control > mechanism. > > > The next step for us is to implement TBCP or similar to do this. > > > Hopes this helps. > > > Cheers / Olle > > > From: pjsip-bounces@lists.pjsip.org [mailto:pjsip-bounces@lists.pjsip.org > ] On Behalf Of Paul Mungai > Sent: den 12 maj 2009 18:42 > To: pjsip@lists.pjsip.org > Subject: [pjsip] Push To Talk Implementation > > > Hello Everyone, > > I would like to implement PTT using the pjsip stack; how can i do > it? I want a software solution so muting/unmuting the mic is not in > my options. > > Thank you. > > Paul Mungai, > Software Engineer, > Worked on Failed & Successful projects. > > Cell: +254-738-138556 | +254-716-444781 > Blog: http://paulmungai.wordpress.com > LinkedIn: http://www.linkedin.com/in/paulmungai > Jay Leno - "Don't forget Mother's Day. Or as they call it in > Beverly Hills, Dad's Third Wife Day." > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip@lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip@lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org