On Fri, Dec 27, 2019 at 2:00 PM Greg Troxel <g...@lexort.com> wrote: > Dovid Bender <do...@telecurve.com> writes: > > > So long as the tcp socket is open your SBC should send the call back over > > the same socket. Now it can be that your SBC is seeing the socket as > > timing out. If you are using Kamailio you can have it send tcp keep > alives > > every so often so that the socket stays up. > > SBC? > > I am curious if the "reuse registration TCP connection" is required by > standards or if it is merely obviously good practice. > > I have had this problem too with asterisk 16.5.0 > > This is not the first recommendation I have seen to use kamailio as a > proxy for asterisk, for these sorts of issues as well as clients that > change addresses. Unfortunately the "jsr pc, set_up_kamailo" subroutine > call is still executing so I can't say if things work right then... >
There is a specification for doing it, but it's not required by the main SIP RFC. In fact the main one states that you're supposed to establish an outgoing connection to the address in the Contact header. In practice, though, this is futile as generally NAT Is in use so you can't connect back and thus you reuse the connection. The chan_sip module should do this automatically, while chan_pjsip will do this if "rewrite_contact" is set to yes. -- Joshua C. Colp Asterisk Technical Lead Sangoma Technologies Check us out at www.sangoma.com and www.asterisk.org
-- _____________________________________________________________________ -- 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
