That was very helpful, thank you - hopefully some of this makes sense to you:
<— SIP read from UDP:54.172.60.0:5060 —>
INVITE sip:[email protected] SIP/2.0
Record-Route: sip:54.172.60.0:5060;lr;ftag=07806895_6772d868_880c190f-6d95-4e0b-9a2f-4bdd30c0dcbd
From: sip:[email protected];tag=07806895_6772d868_880c190f-6d95-4e0b-9a2f-4bdd30c0dcbd
To: sip:[email protected];user=phone
CSeq: 10671 INVITE
Max-Forwards: 61
Accept: application/sdp,application/isup,application/dtmf,application/dtmf-relay,multipart/mixed
P-Asserted-Identity: sip:[email protected]:5060
Content-Disposition: session;handling=required
Diversion: sip:[email protected];reason=unconditional
Call-ID: [email protected]
Via: SIP/2.0/UDP 54.172.60.0:5060;branch=z9hG4bK1885.27995573.0
Via: SIP/2.0/UDP 172.18.12.238:5060;branch=z9hG4bK880c190f-6d95-4e0b-9a2f-4bdd30c0dcbd_6772d868_1759432507970079
Contact: sip:[email protected]:5060;transport=udp
Allow: INVITE,ACK,CANCEL,BYE,UPDATE,OPTIONS
User-Agent: Twilio Gateway
X-Twilio-AccountSid: ACe8281c857a15388463f36c20ad518e2c
X-Twilio-ApiVersion: 2010-04-01
Content-Type: application/sdp
X-Twilio-CallSid: CA882c85f5006eb8a853241caa42972b2e
Content-Length: 248
v=0
o=- 297680592 297680592 IN IP4 54.172.60.107
s=Twilio Media Gateway
c=IN IP4 54.172.60.107
t=0 0
m=audio 14180 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
a=maxptime:20
a=ptime:20
<------------->
— (21 headers 12 lines) —
Sending to 54.172.60.0:5060 (NAT)
Sending to 54.172.60.0:5060 (NAT)
Using INVITE request as basis request - [email protected]
Found peer ‘Twilio-DID2’ for ‘+18584494633’ from 54.172.60.0:5060
<— Reliably Transmitting (NAT) to 54.172.60.0:5060 —>
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 54.172.60.0:5060;branch=z9hG4bK1885.27995573.0;received=54.172.60.0;rport=5060
Via: SIP/2.0/UDP 172.18.12.238:5060;branch=z9hG4bK880c190f-6d95-4e0b-9a2f-4bdd30c0dcbd_6772d868_1759432507970079
From: sip:[email protected];tag=07806895_6772d868_880c190f-6d95-4e0b-9a2f-4bdd30c0dcbd
To: sip:[email protected];user=phone;tag=as6eb0a430
Call-ID: [email protected]
CSeq: 10671 INVITE
Server: FPBX-13.0.61.1(13.7.2)
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
WWW-Authenticate: Digest algorithm=MD5, realm=“asterisk”, nonce="07943769"
Content-Length: 0
<------------>
Scheduling destruction of SIP dialog ‘[email protected]’ in 32000 ms (Method: INVITE)
<— SIP read from UDP:54.172.60.0:5060 —>
ACK sip:[email protected] SIP/2.0
Via: SIP/2.0/UDP 54.172.60.0:5060;branch=z9hG4bK1885.27995573.0
From: sip:[email protected];tag=07806895_6772d868_880c190f-6d95-4e0b-9a2f-4bdd30c0dcbd
Call-ID: [email protected]
To: sip:[email protected];user=phone;tag=as6eb0a430
CSeq: 10671 ACK
Max-Forwards: 70
User-Agent: Twilio Gateway
Content-Length: 0
<------------->
— (9 headers 0 lines) —
<— SIP read from UDP:54.172.60.1:5060 —>
INVITE sip:[email protected] SIP/2.0
Record-Route: sip:54.172.60.1:5060;lr;ftag=77775662_6772d868_e34c4dde-a6a9-4e25-a605-52ef420ef0ba
From: sip:[email protected];tag=77775662_6772d868_e34c4dde-a6a9-4e25-a605-52ef420ef0ba
To: sip:[email protected];user=phone
CSeq: 10671 INVITE
Max-Forwards: 61
Accept: application/sdp,application/isup,application/dtmf,application/dtmf-relay,multipart/mixed
P-Asserted-Identity: sip:[email protected]:5060
Content-Disposition: session;handling=required
Diversion: sip:[email protected];reason=unconditional
Call-ID: [email protected]
Via: SIP/2.0/UDP 54.172.60.1:5060;branch=z9hG4bK871f.b22a5ea1.0
Via: SIP/2.0/UDP 172.18.20.158:5060;branch=z9hG4bKe34c4dde-a6a9-4e25-a605-52ef420ef0ba_6772d868_1759423577477287
Contact: sip:[email protected]:5060;transport=udp
Allow: INVITE,ACK,CANCEL,BYE,UPDATE,OPTIONS
User-Agent: Twilio Gateway
X-Twilio-AccountSid: ACe8281c857a15388463f36c20ad518e2c
X-Twilio-ApiVersion: 2010-04-01
Content-Type: application/sdp
X-Twilio-CallSid: CA882c85f5006eb8a853241caa42972b2e
Content-Length: 250
v=0
o=- 1121804728 1121804728 IN IP4 54.172.60.108
s=Twilio Media Gateway
c=IN IP4 54.172.60.108
t=0 0
m=audio 10850 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
a=maxptime:20
a=ptime:20
<------------->
— (21 headers 12 lines) —
Sending to 54.172.60.1:5060 (NAT)
Sending to 54.172.60.1:5060 (NAT)
Using INVITE request as basis request - [email protected]
Found peer ‘Twilio-DID1’ for ‘+18584494633’ from 54.172.60.1:5060
<— Reliably Transmitting (NAT) to 54.172.60.1:5060 —>
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 54.172.60.1:5060;branch=z9hG4bK871f.b22a5ea1.0;received=54.172.60.1;rport=5060
Via: SIP/2.0/UDP 172.18.20.158:5060;branch=z9hG4bKe34c4dde-a6a9-4e25-a605-52ef420ef0ba_6772d868_1759423577477287
From: sip:[email protected];tag=77775662_6772d868_e34c4dde-a6a9-4e25-a605-52ef420ef0ba
To: sip:[email protected];user=phone;tag=as20f1440a
Call-ID: [email protected]
CSeq: 10671 INVITE
Server: FPBX-13.0.61.1(13.7.2)
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
WWW-Authenticate: Digest algorithm=MD5, realm=“asterisk”, nonce="4370b110"
Content-Length: 0
<------------>
Scheduling destruction of SIP dialog ‘[email protected]’ in 32000 ms (Method: INVITE)
<— SIP read from UDP:54.172.60.1:5060 —>
ACK sip:[email protected] SIP/2.0
Via: SIP/2.0/UDP 54.172.60.1:5060;branch=z9hG4bK871f.b22a5ea1.0
From: sip:[email protected];tag=77775662_6772d868_e34c4dde-a6a9-4e25-a605-52ef420ef0ba
Call-ID: [email protected]
To: sip:[email protected];user=phone;tag=as20f1440a
CSeq: 10671 ACK
Max-Forwards: 70
User-Agent: Twilio Gateway
Content-Length: 0
<------------->
— (9 headers 0 lines) —
<— SIP read from UDP:54.172.60.2:5060 —>
INVITE sip:[email protected] SIP/2.0
Record-Route: sip:54.172.60.2:5060;lr;ftag=05624185_6772d868_9abbe9d4-bd8b-417c-bd0b-377dee05d5a3
From: sip:[email protected];tag=05624185_6772d868_9abbe9d4-bd8b-417c-bd0b-377dee05d5a3
To: sip:[email protected];user=phone
CSeq: 10671 INVITE
Max-Forwards: 61
Accept: application/sdp,application/isup,application/dtmf,application/dtmf-relay,multipart/mixed
P-Asserted-Identity: sip:[email protected]:5060
Content-Disposition: session;handling=required
Diversion: sip:[email protected];reason=unconditional
Call-ID: [email protected]
Via: SIP/2.0/UDP 54.172.60.2:5060;branch=z9hG4bK92e4.5716d602.0
Via: SIP/2.0/UDP 172.18.3.254:5060;branch=z9hG4bK9abbe9d4-bd8b-417c-bd0b-377dee05d5a3_6772d868_1759444306188282
Contact: sip:[email protected]:5060;transport=udp
Allow: INVITE,ACK,CANCEL,BYE,UPDATE,OPTIONS
User-Agent: Twilio Gateway
X-Twilio-AccountSid: ACe8281c857a15388463f36c20ad518e2c
X-Twilio-ApiVersion: 2010-04-01
Content-Type: application/sdp
X-Twilio-CallSid: CA882c85f5006eb8a853241caa42972b2e
Content-Length: 248
v=0
o=- 1440637182 1440637182 IN IP4 54.172.60.72
s=Twilio Media Gateway
c=IN IP4 54.172.60.72
t=0 0
m=audio 19360 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
a=maxptime:20
a=ptime:20
<------------->
— (21 headers 12 lines) —
Sending to 54.172.60.2:5060 (NAT)
Sending to 54.172.60.2:5060 (NAT)
Using INVITE request as basis request - [email protected]
Found peer ‘Twilio-DID4’ for ‘+18584494633’ from 54.172.60.2:5060
<— Reliably Transmitting (NAT) to 54.172.60.2:5060 —>
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 54.172.60.2:5060;branch=z9hG4bK92e4.5716d602.0;received=54.172.60.2;rport=5060
Via: SIP/2.0/UDP 172.18.3.254:5060;branch=z9hG4bK9abbe9d4-bd8b-417c-bd0b-377dee05d5a3_6772d868_1759444306188282
From: sip:[email protected];tag=05624185_6772d868_9abbe9d4-bd8b-417c-bd0b-377dee05d5a3
To: sip:[email protected];user=phone;tag=as53e00658
Call-ID: [email protected]
CSeq: 10671 INVITE
Server: FPBX-13.0.61.1(13.7.2)
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
WWW-Authenticate: Digest algorithm=MD5, realm=“asterisk”, nonce="77e6bf23"
Content-Length: 0
<------------>
Scheduling destruction of SIP dialog ‘[email protected]’ in 32000 ms (Method: INVITE)
<— SIP read from UDP:54.172.60.2:5060 —>
ACK sip:[email protected] SIP/2.0
Via: SIP/2.0/UDP 54.172.60.2:5060;branch=z9hG4bK92e4.5716d602.0
From: sip:[email protected];tag=05624185_6772d868_9abbe9d4-bd8b-417c-bd0b-377dee05d5a3
Call-ID: [email protected]
To: sip:[email protected];user=phone;tag=as53e00658
CSeq: 10671 ACK
Max-Forwards: 70
User-Agent: Twilio Gateway
Content-Length: 0
<------------->