[root@freepbx asterisk]# tail -f /var/log/asterisk/full
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.5.174:5060;rport=5060;branch=z9hG4bKPjeb977f8d-62b7-4953-8a5e-2c0b4775e25e
From: <sip:208@192.168.5.174>;tag=73bd4ac1-d672-4ede-9acb-4d4b0e11c3f8
To: <sip:208@192.168.5.175>;tag=871868361
Call-ID: 2ad11ca6-fa38-4f0b-820e-cb6990ddb4c7
CSeq: 20361 OPTIONS
User-Agent: Yealink SIP-T46S 66.86.0.15
Content-Length: 0




[2022-09-04 19:00:42] VERBOSE[26822] res_pjsip_logger.c: <--- Transmitting SIP request (468 bytes) to UDP:199.87.144.75:5080 --->
OPTIONS sip:17778503917@sip.callcentric.net SIP/2.0
Via: SIP/2.0/UDP 45.31.19.242:5060;rport;branch=z9hG4bKPj79a092d0-e188-4992-91e2-e5a6fcf23f43
From: <sip:17778503917@sip.callcentric.net>;tag=0f00f80f-ff70-48a9-bef9-14a002ce1461
To: <sip:17778503917@sip.callcentric.net>
Contact: <sip:17778503917@45.31.19.242:5060>
Call-ID: 3471f90d-91bc-41df-a260-0fb829daaed0
CSeq: 27393 OPTIONS
Max-Forwards: 70
User-Agent: FPBX-16.0.21.9(18.13.0)
Content-Length:  0


[2022-09-04 19:00:42] VERBOSE[2224] res_pjsip_logger.c: <--- Received SIP response (304 bytes) from UDP:199.87.144.75:5080 --->
SIP/2.0 200 Ok
v: SIP/2.0/UDP 45.31.19.242:5060;rport;branch=z9hG4bKPj79a092d0-e188-4992-91e2-e5a6fcf23f43
f: <sip:17778503917@sip.callcentric.net>;tag=0f00f80f-ff70-48a9-bef9-14a002ce1461
t: <sip:17778503917@sip.callcentric.net>
i: 3471f90d-91bc-41df-a260-0fb829daaed0
CSeq: 27393 OPTIONS
l: 0


[2022-09-04 19:00:48] VERBOSE[26822] res_pjsip_logger.c: <--- Transmitting SIP request (597 bytes) to UDP:199.87.144.75:5080 --->
REGISTER sip:sip.callcentric.net SIP/2.0
Via: SIP/2.0/UDP 45.31.19.242:5060;rport;branch=z9hG4bKPj61e0b9f3-3459-43d0-99d7-ab53ef93e650
From: <sip:17778503917@sip.callcentric.net>;tag=9471b182-3de0-4358-95db-4a8fe9a07baf
To: <sip:17778503917@sip.callcentric.net>
Call-ID: 79fe7f73-47a2-4eed-bb08-bc768cb8266b
CSeq: 64624 REGISTER
Contact: <sip:17778503917@45.31.19.242:5060;line=dwbhcya>
Expires: 3600
Allow: OPTIONS, INVITE, ACK, BYE, CANCEL, UPDATE, PRACK, REGISTER, SUBSCRIBE, NOTIFY, PUBLISH, MESSAGE, REFER
Max-Forwards: 70
User-Agent: FPBX-16.0.21.9(18.13.0)
Content-Length:  0


[2022-09-04 19:00:48] VERBOSE[2224] res_pjsip_logger.c: <--- Received SIP response (374 bytes) from UDP:199.87.144.75:5080 --->
SIP/2.0 200 Ok
v: SIP/2.0/UDP 45.31.19.242:5060;rport=1169;branch=z9hG4bKPj61e0b9f3-3459-43d0-99d7-ab53ef93e650
f: <sip:17778503917@sip.callcentric.net>;tag=9471b182-3de0-4358-95db-4a8fe9a07baf
t: <sip:17778503917@sip.callcentric.net>
i: 79fe7f73-47a2-4eed-bb08-bc768cb8266b
CSeq: 64624 REGISTER
m: <sip:17778503917@45.31.19.242:5060;line=dwbhcya>;expires=70
l: 0