Hi, A bulk registration has been added to the "location" table:*************************** 1. row *************************** id: 113 ruid: uloc-55808d5a-33bc-1 username: pbx domain: NULL contact: sip:pbx@10.10.10.157:5060;bnc received: NULL path: NULL expires: 2015-06-17 10:08:42 q: -1.00 callid: 1-15061@10.10.10.157 cseq: 2last_modified: 2015-06-17 09:08:42 flags: 0 cflags: 0 user_agent: SIPp/Win32 socket: udp:10.10.10.160:5060 methods: NULL instance: NULL reg_id: 01 row in set (0.00 sec) An outgoing call (SIPOUT) is made from a 10-digit number of the pbx: Request-Line: INVITE sip:9191111111@example.net:5060 SIP/2.0From: sipp sip:8181111111@home.net;tag=1To: sip:9191111111@example.net:5060Proxy-Authorization: Digest username="pbx",realm="myhome.net",uri="sip:10.10.10.160:5060",nonce="???",response="??",algorithm=MD5 Even though I changed the value of $fU to "pbx", Kamailio does not authenticate the username and response with a 407 "Proxy Auth Required" response: route[AUTH] {... if (is_method("REGISTER") || from_uri==myself) { # authenticate requests $var(fU) = $fU; $fU = "pbx"; if (!auth_check("$fd", "subscriber", "1")) { auth_challenge("$fd", "0"); exit; } # user authenticated - remove auth header if(!is_method("REGISTER|PUBLISH")) consume_credentials(); } ... $fU = $var(fU); #!endif return;} Is this the correct approach to process outgoing call for bulk registration username?Any help in this regard would be greatly appreciated Thanks,Al