Hello Mark, Have you given TSILO module a try?
https://kamailio.org/docs/modules/5.2.x/modules/tsilo.html On Thu, Feb 7, 2019 at 12:18 Mark Hall <[email protected]> wrote: > Hi, > > > > I am using Kamailio as a gateway for inbound calls to a group of Asterisk > servers. > > > > One particular call scenario involves matching pairs of calls. Originally > I was just sending the calls through to Asterisk for processing (including > the ‘matching up’), but there is a further requirement that the first > received call must not be answered until its matching call arrives – and > this is a little awkward in Asterisk, especially if there will be many > calls. > > > > I thought of t_suspend/t_continue functionality in Kamailio. I have > implemented this: > > > > CallA arrives. > > Send 180-ringing > > Use ds_select_dst() to choose an Asterisk to handle the paired calls > > Store destination and other data in an htable so that I can match the call > later. > > Invoke t_suspend() for CallA. > > > > What I have implemented when the matching call arrives is this: > > > > CallB arrives (and some logic matches it to the suspended CallA). > > Invoke t_continue(‘id’,’label’,’CONTINUE_CALL’); so that CallA is now > released and the route ends in t_relay() to send it on to Asterisk. > > Set $du on CallB to match the destination, then t_relay() this call to > send it on to the same Asterisk. > > > > The solution almost works, but there is a problem. > > > > The t_relay() for CallA is fine, and the call is forwarded. > > > > When the script runs the t_relay() for CallB, I get this logged: > ERROR: tm [t_fwd.c:1728]: t_forward_nonack(): no branches for forwarding > > ERROR: sl [sl_funcs.c:362]: sl_reply_error(): stateless error reply used: > I'm terribly sorry, server error occurred (6/SL) > > > > AND after each call I notice an extra transaction stuck in Kamailio (when > I use kamctl rpc tm.list). > > Can anyone point out where my Kamailio/SIP understanding has let me down? > > Many Thanks, > > Mark Hall > > > > > > > _______________________________________________ > Kamailio (SER) - Users Mailing List > [email protected] > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users >
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