Using Asterisk 13.3.2 on CentOS7 and pjproject 2.4, I can't make asterisk try to send a register. I have configured my pjsip.conf similar to https://wiki.asterisk.org/wiki/display/AST/res_pjsip+Configuration+Examples#res_pjsipConfigurationExamples-ASIPtrunktoyourserviceprovider,includingoutboundregistration my pjsip.conf: http://pastebin.com/raw.php?i=EA0PEcrb using tcpdump, I never even see a packet sent from asterisk trying to register. on the asterisk console: asterisk13*CLI> pjsip show registrations No objects found. asterisk13*CLI> pjsip show contacts Contact: <Aor/ContactUri...................................> <Status....> <RTT(ms)..> ======================================================================================== Contact: provider1/sip:1XXXNNNYYYY at sip.provider1.com Unknown nan asterisk13*CLI> pjsip list aors Aor: <Aor..............................................> <MaxContact> ======================================================================================== Aor: provider1 0 FYI, I can modify pjsip.conf to add configuration for a softphone to register to asterisk - that works fine. Can someone give me a clue on how to make this outbound registration happen ?