i tried dlg_bridge, but found some problems. first, if i didn't define tm module param fr_inv_timer_avp, i got these kind of errors to syslog:

Jul 22 10:28:53 localhost /usr/sbin/sip-router[15075]: INFO: INVITE sip:jh@test.fi by untrusted sip:controller@kamailio.org from <192.98.101.10> Jul 22 10:28:53 localhost /usr/sbin/sip-router[15073]: INFO: <core> [tcp_main.c:1919]: tcp_send: quick connect for 0xb3331098 Jul 22 10:28:53 localhost /usr/sbin/sip-router[15075]: ERROR: <core> [usr_avp.c:159]: ERROR:avp:add_avp: 0 ID or NULL NAME AVP! Jul 22 10:28:53 localhost /usr/sbin/sip-router[15075]: ERROR: tm [t_serial.c:430]: setting of fr_inv_timer_avp failed Jul 22 10:28:53 localhost /usr/sbin/sip-router[15075]: ERROR: Cannot get contacts for INVITE sip:jh_test_fi@192.98.101.10:5074;transport=udp!

nowhere in dialog module docs is mentioned that tm fr_inv_timer_avp would need to be defined. is defining fr_inv_timer_avp mandatory in order to make dlg_bridge to work?

after i defined this avp, and give command

mi dlg_bridge sip:jh@test.fi sip:test@test.fi sip:192.98.101.10:5060

sip:jh@test.fi rings, but when twinkle answers, it does not receive a refer.

when sip:jh@test.fi then ends the call, by sending bye, i noticed that bye goes to sip:kamailio.org:5060 (contact uri in invite) although i have defined

modparam("dialog", "bridge_controller", "sip:click2dial@192.98.101.10:5060")

finally, if these issues get solved, is it even in theory possible to add an "extra headers" parameter to dlg_bridge mi command?

-- juha