Hello, Just one remark - Kamailio can play audio: https://kamailio.org/docs/modules/stable/modules/rtpproxy.html#rtpproxy.f.r… http://kamailio.org/docs/modules/stable/modules/rtp_media_server.html#rtp_m… Cheers, Henning -- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.com -----Original Message----- From: sr-users <sr-users-bounces(a)lists.kamailio.org> On Behalf Of Daniel Tryba Sent: Wednesday, December 4, 2019 4:47 PM To: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> Subject: Re: [SR-Users] Vendor Specific RBT Call Flow On Wed, Dec 04, 2019 at 02:25:33PM +0000, Hamid Hashmi wrote: [RBT call flow] Kamailio itself cannot AFAIK. You need to have something that plays audio. Maybe it can be implemented with rtpengine/proxy directly but for me the easiest way would be to parallel fork to something like asterisk that uses a 183 progress to play(back) any audio (and will never answer). _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users