I used sip setup debug on, and I have this when a call is coming through. Cant understand what it says.
[Aug 23 01:30:03] Reliably Transmitting (NAT) to 192.168.1.19:53718:
[Aug 23 01:30:03] OPTIONS sip:8009@192.168.1.19:53718;rinstance=c595631f0150c715;transport=UDP SIP/2.0
[Aug 23 01:30:03] Via: SIP/2.0/UDP 192.168.1.3:5060;branch=z9hG4bK1c81a423;rport
[Aug 23 01:30:03] Max-Forwards: 70
[Aug 23 01:30:03] From: "asterisk" <sip:asterisk@192.168.1.3>;tag=as600de91a
[Aug 23 01:30:03] To: <sip:8009@192.168.1.19:53718;rinstance=c595631f0150c715;transport=UDP>
[Aug 23 01:30:03] Contact: <sip:asterisk@192.168.1.3:5060>
[Aug 23 01:30:03] Call-ID:
15686e376d000bce2b2b0a8303750fa7@192.168.1.3:5060[Aug 23 01:30:03] CSeq: 102 OPTIONS
[Aug 23 01:30:03] User-Agent: Asterisk PBX 11.22.0-vici
[Aug 23 01:30:03] Date: Mon, 22 Aug 2016 17:30:03 GMT
[Aug 23 01:30:03] Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
[Aug 23 01:30:03] Supported: replaces, timer
[Aug 23 01:30:03] Content-Length: 0
[Aug 23 01:30:03]
[Aug 23 01:30:03]
[Aug 23 01:30:03] ---
[Aug 23 01:30:03]
[Aug 23 01:30:03] <--- SIP read from UDP:192.168.1.19:53718 --->
[Aug 23 01:30:03] SIP/2.0 200 OK
[Aug 23 01:30:03] Via: SIP/2.0/UDP 192.168.1.3:5060;branch=z9hG4bK1c81a423;rport=5060
[Aug 23 01:30:03] Contact: <sip:192.168.1.19:53718>
[Aug 23 01:30:03] To: <sip:8009@192.168.1.19:53718;rinstance=c595631f0150c715;transport=UDP>;tag=41409465
[Aug 23 01:30:03] From: "asterisk"<sip:asterisk@192.168.1.3>;tag=as600de91a
[Aug 23 01:30:03] Call-ID:
15686e376d000bce2b2b0a8303750fa7@192.168.1.3:5060[Aug 23 01:30:03] CSeq: 102 OPTIONS
[Aug 23 01:30:03] Accept: application/sdp, application/sdp
[Aug 23 01:30:03] Accept-Language: en
[Aug 23 01:30:03] Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO, SUBSCRIBE
[Aug 23 01:30:03] Supported: replaces, norefersub, extended-refer, timer, X-cisco-serviceuri
[Aug 23 01:30:03] User-Agent: Z 3.3.25608 r25552
[Aug 23 01:30:03] Allow-Events: presence, kpml
[Aug 23 01:30:03] Content-Length: 0
[Aug 23 01:30:03]
[Aug 23 01:30:03] <------------->
[Aug 23 01:30:03] --- (14 headers 0 lines) ---
[Aug 23 01:30:03] Really destroying SIP dialog
'15686e376d000bce2b2b0a8303750fa7@192.168.1.3:5060' Method: OPTIONS
[Aug 23 01:30:04] Reliably Transmitting (NAT) to 69.71.197.20:5060:
[Aug 23 01:30:04] OPTIONS sip:69.71.197.20 SIP/2.0
[Aug 23 01:30:04] Via: SIP/2.0/UDP 180.191.87.171:5060;branch=z9hG4bK2cc962ae;rport
[Aug 23 01:30:04] Max-Forwards: 70
[Aug 23 01:30:04] From: "asterisk" <sip:asterisk@180.191.87.171>;tag=as6ab323d2
[Aug 23 01:30:04] To: <sip:69.71.197.20>
[Aug 23 01:30:04] Contact: <sip:asterisk@180.191.87.171:5060>
[Aug 23 01:30:04] Call-ID:
4a64468c0964f3820a4627552673581a@180.191.87.171:5060[Aug 23 01:30:04] CSeq: 102 OPTIONS
[Aug 23 01:30:04] User-Agent: Asterisk PBX 11.22.0-vici
[Aug 23 01:30:04] Date: Mon, 22 Aug 2016 17:30:04 GMT
[Aug 23 01:30:04] Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
[Aug 23 01:30:04] Supported: replaces, timer
[Aug 23 01:30:04] Content-Length: 0
[Aug 23 01:30:04]
[Aug 23 01:30:04]
[Aug 23 01:30:04] ---
[Aug 23 01:30:04] Reliably Transmitting (NAT) to 69.71.197.20:5060:
[Aug 23 01:30:04] OPTIONS sip:69.71.197.20 SIP/2.0
[Aug 23 01:30:04] Via: SIP/2.0/UDP 180.191.87.171:5060;branch=z9hG4bK1e3a964c;rport
[Aug 23 01:30:04] Max-Forwards: 70
[Aug 23 01:30:04] From: "asterisk" <sip:asterisk@180.191.87.171>;tag=as163b356e
[Aug 23 01:30:04] To: <sip:69.71.197.20>
[Aug 23 01:30:04] Contact: <sip:asterisk@180.191.87.171:5060>
[Aug 23 01:30:04] Call-ID:
6a51ddc5501479d304282b147e7f9203@180.191.87.171:5060[Aug 23 01:30:04] CSeq: 102 OPTIONS
[Aug 23 01:30:04] User-Agent: Asterisk PBX 11.22.0-vici
[Aug 23 01:30:04] Date: Mon, 22 Aug 2016 17:30:04 GMT
[Aug 23 01:30:04] Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
[Aug 23 01:30:04] Supported: replaces, timer
[Aug 23 01:30:04] Content-Length: 0
[Aug 23 01:30:04]
[Aug 23 01:30:04]
[Aug 23 01:30:04] ---
[Aug 23 01:30:04]
[Aug 23 01:30:04] <--- SIP read from UDP:69.71.197.20:5060 --->
[Aug 23 01:30:04] SIP/2.0 200 OK
[Aug 23 01:30:04] CSeq: 102 OPTIONS
[Aug 23 01:30:04] Via: SIP/2.0/UDP 180.191.87.171:5060;branch=z9hG4bK2cc962ae;rport
[Aug 23 01:30:04] From: "asterisk" <sip:asterisk@180.191.87.171>;tag=as6ab323d2
[Aug 23 01:30:04] Call-ID:
4a64468c0964f3820a4627552673581a@180.191.87.171:5060[Aug 23 01:30:04] To: <sip:69.71.197.20>;tag=220830161702
[Aug 23 01:30:04] Allow: INVITE, ACK, CANCEL, OPTIONS, BYE
[Aug 23 01:30:04] Content-Length: 0
[Aug 23 01:30:04]
[Aug 23 01:30:04] <------------->
[Aug 23 01:30:04] --- (8 headers 0 lines) ---
[Aug 23 01:30:04] Really destroying SIP dialog
'4a64468c0964f3820a4627552673581a@180.191.87.171:5060' Method: OPTIONS
[Aug 23 01:30:04]
[Aug 23 01:30:04] <--- SIP read from UDP:69.71.197.20:5060 --->
[Aug 23 01:30:04] SIP/2.0 200 OK
[Aug 23 01:30:04] CSeq: 102 OPTIONS
[Aug 23 01:30:04] Via: SIP/2.0/UDP 180.191.87.171:5060;branch=z9hG4bK1e3a964c;rport
[Aug 23 01:30:04] From: "asterisk" <sip:asterisk@180.191.87.171>;tag=as163b356e
[Aug 23 01:30:04] Call-ID:
6a51ddc5501479d304282b147e7f9203@180.191.87.171:5060[Aug 23 01:30:04] To: <sip:69.71.197.20>;tag=220830161702
[Aug 23 01:30:04] Allow: INVITE, ACK, CANCEL, OPTIONS, BYE
[Aug 23 01:30:04] Content-Length: 0
[Aug 23 01:30:04]
[Aug 23 01:30:04] <------------->
[Aug 23 01:30:04] --- (8 headers 0 lines) ---
[Aug 23 01:30:04] Really destroying SIP dialog
'6a51ddc5501479d304282b147e7f9203@180.191.87.171:5060' Method: OPTIONS
[Aug 23 01:30:06] == Manager 'sendcron' logged on from 127.0.0.1
[Aug 23 01:30:06] == Manager 'sendcron' logged off from 127.0.0.1