Hello, apparently you have a broken r-uri ($ru) or dst uri ($du), which seems to be an address without leading 'sip:'. It could be because of config file operations, not parameters. Cheers, Daniel On 02/10/14 01:13, Yuriy Gorlichenko wrote: Hello. We use 2 kamailio behind load balanser that have domain name of our system . uac settings like this: modparam("uac","restore_mode","none") modparam("uac","reg_db_url", DBURL) modparam("uac", "reg_db_table", "uacreg") modparam("uac", "reg_timer_interval", 20) modparam("uac", "reg_retry_interval", 10) modparam("uac", "reg_contact_addr", "sip.service.com:5068") modparam("uac","auth_realm_avp","$avp(s:realm)") modparam("uac","auth_username_avp","$avp(s:uname)") modparam("uac","auth_password_avp","$avp(s:passwd)") We have a trouble with registering trunks at porvider. When UAC try to register trunk We see fails like this: tm [ut.h:272]: uri2dst2(): ERROR: uri2dst: bad_uri: sip.service.com ERROR: tm [uac.c:266]: t_uac_prepare(): t_uac: no socket found ERROR: uac [uac_reg.c:746]: uac_reg_update(): failed to send request for [TRUNKNAME] What we try: advertised_address=sip.service.com alias=sip.service.com alias=kam2.service.com alias=Kam1.extern.ip.addr alias=Kam2.extern.ip.addr alias=load.balanser.ext.ipaddr These settings not resolved our issue. We have another trouble and think that it depended issues: We can call to external numbers through trunks, but call very slow. (10-15 seconds), and some operators (LIKE AT&T dropped our calls to voicemail systems and somethink like that) Our question is how to successfully register providers at UAC with this scheme. thanks for advices. _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing listsr-users@lists.sip-router.orghttp://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users -- Daniel-Constantin Mierlahttp://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users