!!! Please note, that this debug log was captured with aor contact=sip:vpbx400015767.mangosip.ru:5060 setting in pjsip.conf !!!

[Sep 22 10:20:02] DEBUG[16599]: pjsip:0 <?>:          endpoint Request msg OPTIONS/cseq=23977 (tdta0x9f66168) created.
[Sep 22 10:20:02] DEBUG[16599]: config.c:3544 ast_parse_arg: extract int from [0] in [-2147483648, 2147483647] gives [0](0)
[Sep 22 10:20:02] DEBUG[16599]: config.c:3544 ast_parse_arg: extract int from [0] in [-2147483648, 2147483647] gives [0](0)
[Sep 22 10:20:02] DEBUG[16599]: config.c:3544 ast_parse_arg: extract int from [0] in [-2147483648, 2147483647] gives [0](0)
[Sep 22 10:20:02] DEBUG[16599]: res_pjsip.c:3075 endpt_send_request: 0x9f3fce4: Wrapper created
[Sep 22 10:20:02] DEBUG[16599]: res_pjsip.c:3106 endpt_send_request: 0x9f3fce4: Set timer to 30000 msec
[Sep 22 10:20:02] DEBUG[16599]: pjsip:0 <?>:      tsx0x9f671d4 .Transaction created for Request msg OPTIONS/cseq=23977 (tdta0x9f66168)
[Sep 22 10:20:02] DEBUG[16599]: pjsip:0 <?>:      tsx0x9f671d4 Sending Request msg OPTIONS/cseq=23977 (tdta0x9f66168) in state Null
[Sep 22 10:20:02] DEBUG[16599]: pjsip:0 <?>:     sip_resolve.c .Starting async DNS A query: target=vpbx400015767.mangosip.ru, transport=Unspecified, port=5060
[Sep 22 10:20:02] DEBUG[16599]: pjsip:0 <?>:      tsx0x9f671d4 .State changed from Null to Calling, event=TX_MSG