[SR-Users] TOPOS contact issue on RE-INVITE

Daren FERREIRA darencrew at hotmail.com
Thu Dec 29 21:45:39 CET 2016


Hello,

I made lots of tests in order to make Kamailio act as a topology hiding proxy,
but i always got problems when using topos to store needed Route and Record-Route informations.

I thought that was because of possible error(s) playing with :
- socket binding
- destination tweaking
that may have lead to transaction breaking, so i decided to use NAT mode (even if that only can be temporary).

My problem is the same. I have not found any way to influence TOPOS on the domain it use on the « Contact » header.

Everything is getting well, iPs on Contact Header are toggled between external and internal sides, until RE-INVITE.
From there, Contact domain are no more toggled, and so:
- Public IP appear on Private side : i can manage my divide to force it to reply to the sender of the request instead of the contact
- Private IP appear on Public side : i can’t do anything to make the external side ignore contact’s domain

I wonder if that is a bug, related to RE-INVITE, or if there is any variable i can change to say topos which domain to be advertised on Contact headers?




		PUBLIC NETWORK SIDE										RFC6598 NETWORK SIDE
									—————————
									|				|
PROVIDER Y.Y.Y.Y———————X.X.X.X—|    	KAMAILIO	]—100.64.10.1————————	100.64.10.2 ASTERISK (or anything else)
									|				|
									—————————



20:58:46.215911 IP 100.64.10.2.5060 > 100.64.10.1.5060: SIP, length: 1004
INVITE sip:+0598 at 100.64.10.1;user=phone SIP/2.0
Via: SIP/2.0/UDP 100.64.10.2:5060;branch=z9hG4bK38ea6539;rport
Max-Forwards: 70
From: "FAX" <sip:+9997 at 100.64.10.2>;tag=as4cfa9905
To: <sip:+0598 at 100.64.10.1;user=phone>
Contact: <sip:+9997 at 100.64.10.2:5060>
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 102 INVITE
User-Agent: Asterisk PBX 13.13.1
Date: Thu, 29 Dec 2016 19:59:36 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
P-Access-Network-Info: GSTN;operator-specific-GI=320615200;network-provided
P-Asserted-Identity: <sip:+9997 at voip-connect.fr;user=phone>
Content-Type: application/sdp
Content-Length: 246

v=0
o=root 79038203 79038203 IN IP4 100.64.10.2
s=Asterisk PBX 13.13.1
c=IN IP4 100.64.10.2
t=0 0
m=audio 13564 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
a=maxptime:150
a=sendrecv

20:58:46.216642 IP 100.64.10.1.5060 > 100.64.10.2.5060: SIP, length: 375
SIP/2.0 100 trying -- your call is important to us
Via: SIP/2.0/UDP 100.64.10.2:5060;branch=z9hG4bK38ea6539;rport=5060;received=100.64.10.2
From: "FAX" <sip:+9997 at 100.64.10.2>;tag=as4cfa9905
To: <sip:+0598 at 100.64.10.1;user=phone>
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 102 INVITE
Content-Length: 0


20:58:46.222391 IP X.X.X.X.5060 > Y.Y.Y.Y.5060: SIP, length: 1040
INVITE sip:+0598 at Y.Y.Y.Y:5060 SIP/2.0
Via: SIP/2.0/UDP X.X.X.X;branch=z9hG4bK0cec.841e0d4a4e7897fd734b985f81a15580.0
Max-Forwards: 69
From: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
To: <sip:+0598 at Y.Y.Y.Y;user=phone>
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 102 INVITE
User-Agent: Asterisk PBX 13.13.1
Date: Thu, 29 Dec 2016 19:59:36 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
P-Access-Network-Info: GSTN;operator-specific-GI=320615200;network-provided
P-Asserted-Identity: <sip:+9997 at voip-connect.fr;user=phone>
Content-Type: application/sdp
Content-Length: 264
Contact: <sip:btpsh-58656af1-769f-1 at X.X.X.X>

v=0
o=root 79038203 79038203 IN IP4 X.X.X.X
s=Asterisk PBX 13.13.1
c=IN IP4 X.X.X.X
t=0 0
m=audio 57810 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
a=maxptime:150
a=sendrecv
a=nortpproxy:yes

20:58:46.234592 IP Y.Y.Y.Y.5060 > X.X.X.X.5060: SIP, length: 290
SIP/2.0 100 Trying
Via: SIP/2.0/UDP X.X.X.X;branch=z9hG4bK0cec.841e0d4a4e7897fd734b985f81a15580.0
From: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
To: <sip:+0598 at Y.Y.Y.Y;user=phone>
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 102 INVITE


20:58:46.548771 IP Y.Y.Y.Y.5060 > X.X.X.X.5060: SIP, length: 718
SIP/2.0 183 Session Progress
Via: SIP/2.0/UDP X.X.X.X;branch=z9hG4bK0cec.841e0d4a4e7897fd734b985f81a15580.0
From: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
To: <sip:+0598 at Y.Y.Y.Y;user=phone>;tag=SDc8s1299-016500890000adc2
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 102 INVITE
Content-Length: 216
Contact: <sip:+0598 at Y.Y.Y.Y:5060;user=phone;transport=udp>
Content-Disposition: session;handling=required
Content-Type: application/sdp

v=0
o=- 1510281183 168103904 IN IP4 Y.Y.Y.Z
s=-
c=IN IP4 Y.Y.Y.Z
t=0 0
m=audio 17818 RTP/AVP 8 101
a=sendrecv
a=ptime:20
a=rtpmap:101 telephone-event/8000
a=maxptime:30
a=silenceSupp:off - - - -

20:58:46.554903 IP 100.64.10.1.5060 > 100.64.10.2.5060: SIP, length: 719
SIP/2.0 183 Session Progress
From: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
To: <sip:+0598 at Y.Y.Y.Y;user=phone>;tag=SDc8s1299-016500890000adc2
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 102 INVITE
Content-Length: 232
Content-Disposition: session;handling=required
Content-Type: application/sdp
Via: SIP/2.0/UDP 100.64.10.2:5060;received=100.64.10.2;branch=z9hG4bK38ea6539;rport=5060
Contact: <sip:atpsh-58656af1-769f-2 at 100.64.10.1>

v=0
o=- 1510281183 168103904 IN IP4 100.64.10.1
s=-
c=IN IP4 100.64.10.1
t=0 0
m=audio 62130 RTP/AVP 8 101
a=sendrecv
a=ptime:20
a=rtpmap:101 telephone-event/8000
a=maxptime:30
a=silenceSupp:off - - - -
a=nortpproxy:yes

20:58:47.735919 IP Y.Y.Y.Y.5060 > X.X.X.X.5060: SIP, length: 709
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP X.X.X.X;branch=z9hG4bK0cec.841e0d4a4e7897fd734b985f81a15580.0
From: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
To: <sip:+0598 at Y.Y.Y.Y;user=phone>;tag=SDc8s1299-016500890000adc2
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 102 INVITE
Content-Length: 216
Contact: <sip:+0598 at Y.Y.Y.Y:5060;user=phone;transport=udp>
Content-Disposition: session;handling=required
Content-Type: application/sdp

v=0
o=- 1510281183 168103904 IN IP4 Y.Y.Y.Z
s=-
c=IN IP4 Y.Y.Y.Z
t=0 0
m=audio 17818 RTP/AVP 8 101
a=sendrecv
a=ptime:20
a=rtpmap:101 telephone-event/8000
a=maxptime:30
a=silenceSupp:off - - - -

20:58:47.741229 IP 100.64.10.1.5060 > 100.64.10.2.5060: SIP, length: 710
SIP/2.0 180 Ringing
From: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
To: <sip:+0598 at Y.Y.Y.Y;user=phone>;tag=SDc8s1299-016500890000adc2
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 102 INVITE
Content-Length: 232
Content-Disposition: session;handling=required
Content-Type: application/sdp
Via: SIP/2.0/UDP 100.64.10.2:5060;received=100.64.10.2;branch=z9hG4bK38ea6539;rport=5060
Contact: <sip:atpsh-58656af1-769f-2 at 100.64.10.1>

v=0
o=- 1510281183 168103904 IN IP4 100.64.10.1
s=-
c=IN IP4 100.64.10.1
t=0 0
m=audio 62130 RTP/AVP 8 101
a=sendrecv
a=ptime:20
a=rtpmap:101 telephone-event/8000
a=maxptime:30
a=silenceSupp:off - - - -
a=nortpproxy:yes

20:58:48.050762 IP Y.Y.Y.Y.5060 > X.X.X.X.5060: SIP, length: 709
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP X.X.X.X;branch=z9hG4bK0cec.841e0d4a4e7897fd734b985f81a15580.0
From: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
To: <sip:+0598 at Y.Y.Y.Y;user=phone>;tag=SDc8s1299-016500890000adc2
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 102 INVITE
Content-Length: 216
Contact: <sip:+0598 at Y.Y.Y.Y:5060;user=phone;transport=udp>
Content-Disposition: session;handling=required
Content-Type: application/sdp

v=0
o=- 1510281183 168103904 IN IP4 Y.Y.Y.Z
s=-
c=IN IP4 Y.Y.Y.Z
t=0 0
m=audio 17818 RTP/AVP 8 101
a=sendrecv
a=ptime:20
a=rtpmap:101 telephone-event/8000
a=maxptime:30
a=silenceSupp:off - - - -

20:58:48.056175 IP 100.64.10.1.5060 > 100.64.10.2.5060: SIP, length: 710
SIP/2.0 180 Ringing
From: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
To: <sip:+0598 at Y.Y.Y.Y;user=phone>;tag=SDc8s1299-016500890000adc2
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 102 INVITE
Content-Length: 232
Content-Disposition: session;handling=required
Content-Type: application/sdp
Via: SIP/2.0/UDP 100.64.10.2:5060;received=100.64.10.2;branch=z9hG4bK38ea6539;rport=5060
Contact: <sip:atpsh-58656af1-769f-2 at 100.64.10.1>

v=0
o=- 1510281183 168103904 IN IP4 100.64.10.1
s=-
c=IN IP4 100.64.10.1
t=0 0
m=audio 62130 RTP/AVP 8 101
a=sendrecv
a=ptime:20
a=rtpmap:101 telephone-event/8000
a=maxptime:30
a=silenceSupp:off - - - -
a=nortpproxy:yes

20:58:52.811066 IP Y.Y.Y.Y.5060 > X.X.X.X.5060: SIP, length: 774
SIP/2.0 200 OK
Via: SIP/2.0/UDP X.X.X.X;branch=z9hG4bK0cec.841e0d4a4e7897fd734b985f81a15580.0
From: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
To: <sip:+0598 at Y.Y.Y.Y;user=phone>;tag=SDc8s1299-016500890000adc2
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 102 INVITE
Content-Length: 216
Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,INFO
Contact: <sip:+0598 at Y.Y.Y.Y:5060;user=phone;transport=udp>
Accept-Encoding: identity
Content-Disposition: session;handling=required
Content-Type: application/sdp

v=0
o=- 1510281183 168103904 IN IP4 Y.Y.Y.Z
s=-
c=IN IP4 Y.Y.Y.Z
t=0 0
m=audio 17818 RTP/AVP 8 101
a=sendrecv
a=ptime:20
a=rtpmap:101 telephone-event/8000
a=maxptime:30
a=silenceSupp:off - - - -

20:58:52.818381 IP 100.64.10.1.5060 > 100.64.10.2.5060: SIP, length: 775
SIP/2.0 200 OK
From: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
To: <sip:+0598 at Y.Y.Y.Y;user=phone>;tag=SDc8s1299-016500890000adc2
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 102 INVITE
Content-Length: 232
Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,INFO
Accept-Encoding: identity
Content-Disposition: session;handling=required
Content-Type: application/sdp
Via: SIP/2.0/UDP 100.64.10.2:5060;received=100.64.10.2;branch=z9hG4bK38ea6539;rport=5060
Contact: <sip:atpsh-58656af1-769f-2 at 100.64.10.1>

v=0
o=- 1510281183 168103904 IN IP4 100.64.10.1
s=-
c=IN IP4 100.64.10.1
t=0 0
m=audio 62130 RTP/AVP 8 101
a=sendrecv
a=ptime:20
a=rtpmap:101 telephone-event/8000
a=maxptime:30
a=silenceSupp:off - - - -
a=nortpproxy:yes

20:58:52.819315 IP 100.64.10.2.5060 > 100.64.10.1.5060: SIP, length: 446
ACK sip:atpsh-58656af1-769f-2 at 100.64.10.1 SIP/2.0
Via: SIP/2.0/UDP 100.64.10.2:5060;branch=z9hG4bK18c31028;rport
Max-Forwards: 70
From: "FAX" <sip:+9997 at 100.64.10.2>;tag=as4cfa9905
To: <sip:+0598 at 100.64.10.1;user=phone>;tag=SDc8s1299-016500890000adc2
Contact: <sip:+9997 at 100.64.10.2:5060>
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 102 ACK
User-Agent: Asterisk PBX 13.13.1
Content-Length: 0


20:58:52.825894 IP X.X.X.X.5060 > Y.Y.Y.Y.5060: SIP, length: 491
ACK sip:+0598 at Y.Y.Y.Y:5060;user=phone;transport=udp SIP/2.0
Via: SIP/2.0/UDP X.X.X.X;branch=z9hG4bK0cec.d149220aa711a5230da51bfea457d8bc.0
Max-Forwards: 69
From: "FAX" <sip:+9997 at 100.64.10.2>;tag=as4cfa9905
To: <sip:+0598 at 100.64.10.1;user=phone>;tag=SDc8s1299-016500890000adc2
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 102 ACK
User-Agent: Asterisk PBX 13.13.1
Content-Length: 0
Contact: <sip:btpsh-58656af1-769f-1 at X.X.X.X>


20:59:00.388481 IP Y.Y.Y.Y.5060 > X.X.X.X.5060: SIP, length: 910
INVITE sip:btpsh-58656af1-769f-1 at X.X.X.X <sip:btpsh-58656af1-769f-1 at X.X.X.X> SIP/2.0
Via: SIP/2.0/UDP Y.Y.Y.Y:5060;branch=z9hG4bKm3trae309oacrlkm13h0sb0000g00.1
To: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
From: <sip:+0598 at Y.Y.Y.Y;user=phone>;tag=SDc8s1299-016500890000adc2
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 1 INVITE
Content-Length: 273
Max-Forwards: 69
Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,INFO
Contact: <sip:+0598 at Y.Y.Y.Y:5060;user=phone;transport=udp>
Accept-Encoding: identity
Content-Disposition: session;handling=required
Content-Type: application/sdp

v=0
o=- 1510281183 168103905 IN IP4 Y.Y.Y.Z
s=-
c=IN IP4 Y.Y.Y.Z
t=0 0
m=image 17818 udptl t38
a=T38FaxVersion:0
a=T38MaxBitRate:14400
a=T38FaxRateManagement:transferredTCF
a=T38FaxMaxBuffer:1800
a=T38FaxMaxDatagram:260
a=T38FaxUdpEC:t38UDPRedundancy

20:59:00.390679 IP X.X.X.X.5060 > Y.Y.Y.Y.5060: SIP, length: 420
SIP/2.0 100 trying -- your call is important to us
Via: SIP/2.0/UDP Y.Y.Y.Y:5060;branch=z9hG4bKm3trae309oacrlkm13h0sb0000g00.1;rport=5060
To: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
From: <sip:+0598 at Y.Y.Y.Y;user=phone>;tag=SDc8s1299-016500890000adc2
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 1 INVITE
Content-Length: 0


20:59:00.395723 IP 100.64.10.1.5060 > 100.64.10.2.5060: SIP, length: 890
INVITE sip:+9997 at 100.64.10.2:5060 SIP/2.0
Via: SIP/2.0/UDP 100.64.10.1;branch=z9hG4bK720b.88d9cf77da5d6f5fa4aac2c5623d8ac4.0
To: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
From: <sip:+0598 at Y.Y.Y.Y;user=phone>;tag=SDc8s1299-016500890000adc2
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 1 INVITE
Content-Length: 289
Max-Forwards: 68
Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,INFO
Accept-Encoding: identity
Content-Disposition: session;handling=required
Content-Type: application/sdp
Contact: <sip:btpsh-58656af1-769f-1 at X.X.X.X>

v=0
o=- 1510281183 168103905 IN IP4 100.64.10.1
s=-
c=IN IP4 100.64.10.1
t=0 0
m=image 62130 udptl t38
a=T38FaxVersion:0
a=T38MaxBitRate:14400
a=T38FaxRateManagement:transferredTCF
a=T38FaxMaxBuffer:1800
a=T38FaxMaxDatagram:260
a=T38FaxUdpEC:t38UDPRedundancy
a=nortpproxy:yes

20:59:00.397160 IP 100.64.10.2.5060 > 100.64.10.1.5060: SIP, length: 580
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 100.64.10.1;branch=z9hG4bK720b.88d9cf77da5d6f5fa4aac2c5623d8ac4.0;received=100.64.10.1;rport=5060
From: <sip:+0598 at Y.Y.Y.Y;user=phone>;tag=SDc8s1299-016500890000adc2
To: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 1 INVITE
Server: Asterisk PBX 13.13.1
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Contact: <sip:+9997 at 100.64.10.2:5060>
Content-Length: 0


20:59:00.397344 IP 100.64.10.2.5060 > 100.64.10.1.5060: SIP, length: 875
SIP/2.0 200 OK
Via: SIP/2.0/UDP 100.64.10.1;branch=z9hG4bK720b.88d9cf77da5d6f5fa4aac2c5623d8ac4.0;received=100.64.10.1;rport=5060
From: <sip:+0598 at Y.Y.Y.Y;user=phone>;tag=SDc8s1299-016500890000adc2
To: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 1 INVITE
Server: Asterisk PBX 13.13.1
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Contact: <sip:+9997 at 100.64.10.2:5060>
Content-Type: application/sdp
Content-Length: 266

v=0
o=root 79038203 79038204 IN IP4 100.64.10.2
s=Asterisk PBX 13.13.1
c=IN IP4 100.64.10.2
t=0 0
m=image 4882 udptl t38
a=T38FaxVersion:0
a=T38MaxBitRate:14400
a=T38FaxRateManagement:transferredTCF
a=T38FaxMaxDatagram:1400
a=T38FaxUdpEC:t38UDPRedundancy

20:59:00.405004 IP X.X.X.X.5060 > Y.Y.Y.Y.5060: SIP, length: 874
SIP/2.0 200 OK
From: <sip:+0598 at Y.Y.Y.Y;user=phone>;tag=SDc8s1299-016500890000adc2
To: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 1 INVITE
Server: Asterisk PBX 13.13.1
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Content-Type: application/sdp
Content-Length: 285
Via: SIP/2.0/UDP Y.Y.Y.Y:5060;rport=5060;branch=z9hG4bKm3trae309oacrlkm13h0sb0000g00.1
Contact: <sip:atpsh-58656af1-769f-2 at 100.64.10.1>

v=0
o=root 79038203 79038204 IN IP4 X.X.X.X
s=Asterisk PBX 13.13.1
c=IN IP4 X.X.X.X
t=0 0
m=image 57810 udptl t38
a=T38FaxVersion:0
a=T38MaxBitRate:14400
a=T38FaxRateManagement:transferredTCF
a=T38FaxMaxDatagram:1400
a=T38FaxUdpEC:t38UDPRedundancy
a=nortpproxy:yes

20:59:00.896864 IP 100.64.10.2.5060 > 100.64.10.1.5060: SIP, length: 875
SIP/2.0 200 OK
Via: SIP/2.0/UDP 100.64.10.1;branch=z9hG4bK720b.88d9cf77da5d6f5fa4aac2c5623d8ac4.0;received=100.64.10.1;rport=5060
From: <sip:+0598 at Y.Y.Y.Y;user=phone>;tag=SDc8s1299-016500890000adc2
To: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 1 INVITE
Server: Asterisk PBX 13.13.1
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Contact: <sip:+9997 at 100.64.10.2:5060>
Content-Type: application/sdp
Content-Length: 266

v=0
o=root 79038203 79038204 IN IP4 100.64.10.2
s=Asterisk PBX 13.13.1
c=IN IP4 100.64.10.2
t=0 0
m=image 4882 udptl t38
a=T38FaxVersion:0
a=T38MaxBitRate:14400
a=T38FaxRateManagement:transferredTCF
a=T38FaxMaxDatagram:1400
a=T38FaxUdpEC:t38UDPRedundancy

20:59:00.904049 IP X.X.X.X.5060 > Y.Y.Y.Y.5060: SIP, length: 874
TSIP/2.0 200 OK
From: <sip:+0598 at Y.Y.Y.Y;user=phone>;tag=SDc8s1299-016500890000adc2
To: "FAX" <sip:+9997 at X.X.X.X>;tag=as4cfa9905
Call-ID: 1c9fb2447f3f72732a83aafa6a3e3017 at 100.64.10.2:5060
CSeq: 1 INVITE
Server: Asterisk PBX 13.13.1
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Content-Type: application/sdp
Content-Length: 285
Via: SIP/2.0/UDP Y.Y.Y.Y:5060;rport=5060;branch=z9hG4bKm3trae309oacrlkm13h0sb0000g00.1
Contact: <sip:atpsh-58656af1-769f-2 at 100.64.10.1>

v=0
o=root 79038203 79038204 IN IP4 X.X.X.X
s=Asterisk PBX 13.13.1
c=IN IP4 X.X.X.X
t=0 0
m=image 57810 udptl t38
a=T38FaxVersion:0
a=T38MaxBitRate:14400
a=T38FaxRateManagement:transferredTCF
a=T38FaxMaxDatagram:1400
a=T38FaxUdpEC:t38UDPRedundancy
a=nortpproxy:yes


And so on until timeout and BYE


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sip-router.org/pipermail/sr-users/attachments/20161229/4667ca6f/attachment.html>


More information about the sr-users mailing list