On 06/05/2013 01:32 PM, Khoa Pham wrote: > How can we leverage pjsip to enable Push to talk function ? > > In a Push to talk, only one can talk at a time > > > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org I've implemented PTT in two different ways: PTT request via DTMF: User sends a certain DTMF tone which the remote interprets as "I want to talk". Any other DTMF tone releases PTT. If PTT is granted, the user hears a short beeptone (generated using the tonegen facility in PJ) so they know that they can talk. This solution is good if you have to support third party SIP clients. SIP MESSAGE: If you're connecting two SIP peers (both of which are under your control (meaning you wrote them)) you can implement your own protocol for signalling things like PTT, SQU and so on using SIP MESSAGE as a transport. Regards, Andy
