Re: [SR-Users] Re-invite problems with t.38?

20 Apr 2010

Hi Espen, can you provide the traces with proper line break?

E.g. I always use

"ngrep -W byline -t -q -P "" any-pattery port 5060"

regards
klaus

Am 17.04.2010 21:39, schrieb Espen Berg:
...
  Den 15.04.2010 13:27, skrev Klaus Darilion:

   How would
you have written it? 
 I prefer this logic:

 ...
 if (loose_route()) {
 if (!has_totag()) {
 xlog("L_WARN","$ci loose_route request without to-tag, 403...\n");
 sl_send_reply("403", "out-of-dialog loose_route not allowed");
 exit;
 }
 ... loose..route..processing
 ... NAT traversal...rtpproxy....
 t_relay();
 }
 ...
 initial call setup ...
 ... 
 Nice :)

    Trace the scenario with ngrep and take a look at the
SDPs if they are
 rewritten properly. 
 I'm not able to spot any errors, the only error I'm able to see is that
 it seems to work one way.

 If A sends a fax to B

 This works with T.38:
 asterisk A <-> sipprovider <-> our trunk <-> kamailio/rtpp <->
asterisk
 <-> asterisk B (our asterisk)

 This fails with T.38, but works with G.711:
 asterisk B -> asterisk -> kamailio/rtpp -> our trunk -> asterisk ->
 asterisk A

 Could also be an Asterisk (A: 1.6.2.5/tested with 1.6.2.7rc, B: 1.6.2.6)
 or FFA bug. But if I try to send the FAX directly via SIP from A <-> B
 without the proxy everything works OK, so therefore I believe the
 problem are related to my kamailio configuration. 
 Post the ngrep dump of the 2 different processes. 
 I have been debugging this problem little bit more. The re-invite test
 showed precisely the same with x-lite on hold as
 with t.38 re-invite.

 If I call out and place a call on hold, I'm able to continue the call
 for about 20 seconds until the call was aborted. If
 I call into the same extension there are no problems to continue the
 call after "on hold". So just as the fax, the problem
 only occurs for outgoing calls, not inbound. I also tested with a
 cellular phone, just to eliminate the other end.

 Here are some ncat captures of the t.38 scenario that fails.

 ASTERISK B:

#############################################################################################################################$

 U PUBLIC-IP-TO-PROXY:5060 -> IP-TO-ASTERISK:5060
 INVITE sip:FAXNUMBER@IP-TO-ASTERISK:5060 SIP/2.0..Via: SIP/2.0/UDP
 PUBLIC-IP-TO-PROXY;branch=z9hG4bK61a.7e6809b3.0..Vi
 a: SIP/2.0/UDP
 IP-TO-SONUS-TRUNK:5060;branch=z9hG4bK02B5afc10d34f983f6e..From:
 <sip:SENDTONUMBER@PUBLIC-IP-TO-PROXY>;tag=gK02b1
 6fe7..To: "FAX"
 <sip:FAXNUMBER@PUBLIC-IP-TO-PROXY>;tag=as56fa57a3..Call-ID:
 15180894487146a33b3f3bac366bc0bb@PUBLIC-IP-TO-PROXY
 ..CSeq: 17055 INVITE..Max-Forwards: 70..Allow:
 INVITE,ACK,CANCEL,BYE,REFER,INFO,SUBSCRIBE,NOTIFY,PRACK,UPDAT
 E,OPTIONS,MESSAGE,PUBLISH..Accept: application/sdp, application/isup,
 application/dtmf, application/dtmf-relay,
 multipart/mixed..Contact:
 <sip:SENDTONUMBER@IP-TO-SONUS-TRUNK:5060>..Supported:
 timer..Session-Expires: 1800;refresher=uas.
 .Min-SE: 90..Content-Length: 323..Content-Disposition: session;
 handling=required..Content-Type: application/sdp
 ....v=0..o=Sonus_UAC 23586 20272 IN IP4 IP-TO-SONUS-TRUNK..s=SIP Media
 Capabilities..c=IN IP4 PUBLIC-IP-TO-PROXY..t=0 0..m=
 image 35298 udptl

t38..a=T38FaxVersion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxM

axBuffer:262..a=T38FaxMaxDatagram:176..a=T38FaxUdpEC:t38UDPRedundancy..a=sendrecv..a=nortpproxy:yes..

 ###
 U IP-TO-ASTERISK:5060 -> PUBLIC-IP-TO-PROXY:5060
 SIP/2.0 200 OK..Via: SIP/2.0/UDP
 PUBLIC-IP-TO-PROXY;branch=z9hG4bK61a.7e6809b3.0;received=PUBLIC-IP-TO-PROXY..Via:
 SIP/2.
 0/UDP IP-TO-SONUS-TRUNK:5060;branch=z9hG4bK02B5afc10d34f983f6e..From:
 <sip:SENDTONUMBER@PUBLIC-IP-TO-PROXY>;tag=gK02b16fe7..To:
 "FAX" <sip:FAXNUMBER@PUBLIC-IP-TO-PROXY>;tag=as56fa57a3..Call-ID:
 15180894487146a33b3f3bac366bc0bb@PUBLIC-IP-TO-PROXY..CS
 eq: 17055 INVITE..Server: Asterisk PBX 1.6.2.6..Allow: INVITE, ACK,
 CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIF
 Y, INFO..Supported: replaces, timer..Require: timer..Session-Expires:
 1800;refresher=uas..Contact: <sip:FAXNUMBER@
 IP-TO-ASTERISK>..Content-Type: application/sdp..Content-Length:
 276....v=0..o=root 1138957066 1138957067 IN IP4 IP-TO-ASTERISK
 ..s=Asterisk PBX 1.6.2.6..c=IN IP4 IP-TO-ASTERISK..t=0 0..m=image 4400
 udptl t38..a=T38FaxVersion:0.

.a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxDatagram:1400..a=T38FaxUdpEC:t38UDPRedu

 ndancy..

#############################################################################################################################$

 KAMAILIO PROXY ETH0:

 U PUBLIC-IP-TO-PROXY:5060 -> IP-TO-ASTERISK:5060
 INVITE sip:FAXNUMBER@IP-TO-ASTERISK:5060 SIP/2.0..Via: SIP/2.0/UDP
 PUBLIC-IP-TO-PROXY;branch=z9hG4bK6d41.d083efb2.0..Via: SIP/2.0/UDP
 IP-TO-SONUS-TRUNK:5060;branch=z9hG4bK02B44d12570046e38f1..From:
 <sip:SENDTONUMBER@PUBLIC-IP-TO-PROXY>;tag=gK02ec0fad.
 .To: "FAX" <sip:FAXNUMBER@PUBLIC-IP-TO-PROXY>;tag=as6196c897..Call-ID:
 58b69aef10209bf30e38c5371ebb29cf@PUBLIC-IP-TO-PROXY..CSeq: 15775
 INVITE..Max-Forwards: 70..Allow:
 INVITE,ACK,CANCEL,BYE,REFER,INFO,SUBSCRIBE,NOTIFY,PRACK,UPDATE,OPTIONS,M
 ESSAGE,PUBLISH..Accept: application/sdp, application/isup,
 application/dtmf, application/dtmf-relay, multipart/mixed..Contact:
 <sip:SENDTONUMBER@IP-TO-SONUS-TRUNK:5060>..Supported:
 timer..Session-Expires: 1800;refresher=uas..Min-SE: 90..Cont
 ent-Length: 322..Content-Disposition: session;
 handling=required..Content-Type: application/sdp....v=0..o=Sonus_UAC
 9775 15421 IN IP4 IP-TO-SONUS-TRUNK..s=SIP Media Capabilities..c=IN IP4
 PUBLIC-IP-TO-PROXY..t=0 0..m=image 35292 udptl t38..a

=T38FaxVersion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxBuffer:262..a=T38FaxMaxDatagram:176..a=T38FaxUdpEC:t38UDPRedundancy..a=sendrecv..a=nortpproxy:yes..

 ###
 U IP-TO-ASTERISK:5060 -> PUBLIC-IP-TO-PROXY:5060
 SIP/2.0 200 OK..Via: SIP/2.0/UDP
 PUBLIC-IP-TO-PROXY;branch=z9hG4bK6d41.d083efb2.0;received=PUBLIC-IP-TO-PROXY..Via:
 SIP/2.0/UDP
 IP-TO-SONUS-TRUNK:5060;branch=z9hG4bK02B44d12570046e38f1..From:
 <sip:SENDTONUMBER@PUBLIC-IP-TO-PROXY>;tag=gK02ec0fad..To: "FAX
 " <sip:FAXNUMBER@PUBLIC-IP-TO-PROXY>;tag=as6196c897..Call-ID:
 58b69aef10209bf30e38c5371ebb29cf@PUBLIC-IP-TO-PROXY..CSeq: 15775
 INVITE..Server: Asterisk PBX 1.6.2.6..Allow: INVITE, ACK, CANCEL,
 OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO..Su
 pported: replaces, timer..Require: timer..Session-Expires:
 1800;refresher=uas..Contact:
 <sip:FAXNUMBER@IP-TO-ASTERISK>..Content-Type:
 application/sdp..Content-Length: 276....v=0..o=root 1675681328
 1675681329 IN IP4 IP-TO-ASTERISK..s=
 Asterisk PBX 1.6.2.6..c=IN IP4 IP-TO-ASTERISK..t=0 0..m=image 4852 udptl

t38..a=T38FaxVersion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxDatagram:1400..a=T38FaxUdpEC:t38UDPRedundancy..

 KAMAILIO PROXY ETH1:

 U IP-TO-SONUS-TRUNK:5060 -> LOCAL-IP-TO-PROXY:5060
 INVITE sip:FAXNUMBER@IP-TO-ASTERISK:5060 SIP/2.0..Via: SIP/2.0/UDP
 IP-TO-SONUS-TRUNK:5060;branch=z9hG4bK02B48cc1116e608d4ed..From:
 <sip:SENDTONUMBER@PUBLIC-IP-TO-PROXY>;tag=gK02f86d27..To: "FAX"
 <sip:FAXNUMBER@PUBLIC-IP-TO-PROXY>;tag=as279d4a05..Call-I
 D: 101766785455b9020d350d300cb15082@PUBLIC-IP-TO-PROXY..CSeq: 24873
 INVITE..Max-Forwards: 70..Allow:

INVITE,ACK,CANCEL,BYE,REFER,INFO,SUBSCRIBE,NOTIFY,PRACK,UPDATE,OPTIONS,MESSAGE,PUBLISH..Accept:
 application/sdp, application/isup, appl
 ication/dtmf, application/dtmf-relay, multipart/mixed..Contact:
 <sip:SENDTONUMBER@IP-TO-SONUS-TRUNK:5060>..Route:
 <sip:LOCAL-IP-TO-PROXY:5060;r2=on;lr;ftag=as279d4a05>..Route:
 <sip:PUBLIC-IP-TO-PROXY:5060;r2=on;lr;ftag=as279d4a05>..Supported: timer..
 Session-Expires: 1800;refresher=uas..Min-SE: 90..Content-Length:
 301..Content-Disposition: session; handling=required..Content-Type:
 application/sdp....v=0..o=Sonus_UAC 18853 20363 IN IP4
 IP-TO-SONUS-TRUNK..s=SIP Media Capabilities..c=IN
 IP4 RTP-IP-TO-SONUSTRUNK..t=0 0..m=image 7994 udptl

t38..a=T38FaxVersion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxBuffer:262..a=T38FaxMaxDatagram:176..a=T38FaxUdpEC:t38UDPRedundancy..a=sendrecv..

 ####
 U LOCAL-IP-TO-PROXY:5060 -> IP-TO-SONUS-TRUNK:5060
 SIP/2.0 200 OK..Via: SIP/2.0/UDP
 IP-TO-SONUS-TRUNK:5060;branch=z9hG4bK02B48cc1116e608d4ed..From:
 <sip:SENDTONUMBER@PUBLIC-IP-TO-PROXY>;tag=gK02f86d27..To: "FAX"
 <sip:FAXNUMBER@PUBLIC-IP-TO-PROXY>;tag=as279d4a05..Call-ID:
 101766785455b9020d350d300cb150
 82@PUBLIC-IP-TO-PROXY..CSeq: 24873 INVITE..Server: Asterisk PBX
 1.6.2.6..Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
 NOTIFY, INFO..Supported: replaces, timer..Require:
 timer..Session-Expires: 1800;refresher=uas..Contact:
 <sip:FAXNUMBER@IP-TO-ASTERISK>..Content-Type:
 application/sdp..Content-Length: 293....v=0..o=root 1135418376
 1135418377 IN IP4 IP-TO-ASTERISK..s=Asterisk PBX 1.6.2.6..c=IN IP4
 LOCAL-IP-TO-PROXY..t=0 0..m=image 35324 udptl t38..a=T38FaxVe

rsion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxDatagram:1400..a=T38FaxUdpEC:t38UDPRedundancy..a=nortpproxy:yes..

 U IP-TO-SONUS-TRUNK:5060 -> LOCAL-IP-TO-PROXY:5060
 INVITE sip:FAXNUMBER@IP-TO-ASTERISK:5060 SIP/2.0..Via: SIP/2.0/UDP
 IP-TO-SONUS-TRUNK:5060;branch=z9hG4bK02B48cc1116e608d4ed..From:
 <sip:SENDTONUMBER@PUBLIC-IP-TO-PROXY>;tag=gK02f86d27..To: "FAX"
 <sip:FAXNUMBER@PUBLIC-IP-TO-PROXY>;tag=as279d4a05..Call-I
 D: 101766785455b9020d350d300cb15082@PUBLIC-IP-TO-PROXY..CSeq: 24873
 INVITE..Max-Forwards: 70..Allow:

INVITE,ACK,CANCEL,BYE,REFER,INFO,SUBSCRIBE,NOTIFY,PRACK,UPDATE,OPTIONS,MESSAGE,PUBLISH..Accept:
 application/sdp, application/isup, appl
 ication/dtmf, application/dtmf-relay, multipart/mixed..Contact:
 <sip:SENDTONUMBER@IP-TO-SONUS-TRUNK:5060>..Route:
 <sip:LOCAL-IP-TO-PROXY:5060;r2=on;lr;ftag=as279d4a05>..Route:
 <sip:PUBLIC-IP-TO-PROXY:5060;r2=on;lr;ftag=as279d4a05>..Supported: timer..
 Session-Expires: 1800;refresher=uas..Min-SE: 90..Content-Length:
 301..Content-Disposition: session; handling=required..Content-Type:
 application/sdp....v=0..o=Sonus_UAC 18853 20363 IN IP4
 IP-TO-SONUS-TRUNK..s=SIP Media Capabilities..c=IN
 IP4 RTP-IP-TO-SONUSTRUNK..t=0 0..m=image 7994 udptl

t38..a=T38FaxVersion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxBuffer:262..a=T38FaxMaxDatagram:176..a=T38FaxUdpEC:t38UDPRedundancy..a=sendrecv..

 ####
 U LOCAL-IP-TO-PROXY:5060 -> IP-TO-SONUS-TRUNK:5060
 SIP/2.0 200 OK..Via: SIP/2.0/UDP
 IP-TO-SONUS-TRUNK:5060;branch=z9hG4bK02B48cc1116e608d4ed..From:
 <sip:SENDTONUMBER@PUBLIC-IP-TO-PROXY>;tag=gK02f86d27..To: "FAX"
 <sip:FAXNUMBER@PUBLIC-IP-TO-PROXY>;tag=as279d4a05..Call-ID:
 101766785455b9020d350d300cb150
 82@PUBLIC-IP-TO-PROXY..CSeq: 24873 INVITE..Server: Asterisk PBX
 1.6.2.6..Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
 NOTIFY, INFO..Supported: replaces, timer..Require:
 timer..Session-Expires: 1800;refresher=uas..Contact:
 <sip:FAXNUMBER@IP-TO-ASTERISK>..Content-Type:
 application/sdp..Content-Length: 293....v=0..o=root 1135418376
 1135418377 IN IP4 IP-TO-ASTERISK..s=Asterisk PBX 1.6.2.6..c=IN IP4
 LOCAL-IP-TO-PROXY..t=0 0..m=image 35324 udptl t38..a=T38FaxVe

rsion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxDatagram:1400..a=T38FaxUdpEC:t38UDPRedundancy..a=nortpproxy:yes..

 ASTERISK A:
 (REMOTE TESTSITE CONNECTED TO PHONZO, ONE PROVIDER KNOWN TO PROVIDE
 FUNCTIONING T.38 SERVICES)

 ########################
 U ASTERISK-TESTSITE-IP:5060 -> 80.232.37.178:5060
 INVITE sip:80.232.37.178:5061 SIP/2.0..Via: SIP/2.0/UDP
 85.165.146.221:5060;branch=z9hG4bK7726391b;rport..Route: <sip:80.232.37
 .178;ftag=b1ae9fe1eb7f13837782c9061d653c57;lr>..Max-Forwards: 70..From:
 <sip:47SENDTONUMBER@80.232.37.178>;tag=as61e4a63c..To: 6970
 8347
 <sip:FAXNUMBER@80.232.37.178>;tag=b1ae9fe1eb7f13837782c9061d653c57..Contact:
 <sip:SENDTONUMBER@85.165.146.221>..Call-ID: 3D1965
 63-47C711DF-AC2A9E0C-AB1DB137@80.232.37.179..CSeq: 102
 INVITE..User-Agent: none..Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFE
 R, SUBSCRIBE, NOTIFY, INFO..Supported: replaces, timer..Content-Type:
 application/sdp..Content-Length: 268....v=0..o=root 10588
 12562 1058812563 IN IP4 85.165.146.221..s=Asterisk PBX 1.6.2.5..c=IN IP4
 85.165.146.221..t=0 0..m=image 4810 udptl t38..a=T38Fa

xVersion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxDatagram:849..a=T38FaxUdpEC:t38UDPFEC..

 ######
 U 80.232.37.178:5060 -> ASTERISK-TESTSITE-IP:5060
 SIP/2.0 200 OK..Via: SIP/2.0/UDP
 85.165.146.221:5060;branch=z9hG4bK7726391b;rport=5060..Record-Route:
 <sip:80.232.37.178;ftag=a
 s61e4a63c;lr>..From:
 <sip:47SENDTONUMBER@80.232.37.178>;tag=as61e4a63c..To: FAXNUMBER
 <sip:FAXNUMBER@80.232.37.178>;tag=b1ae9fe1eb7f1
 3837782c9061d653c57..Call-ID:
 3D196563-47C711DF-AC2A9E0C-AB1DB137@80.232.37.179..CSeq: 102
 INVITE..Server: Sippy..Contact: Anon
 ymous <sip:80.232.37.178:5061>..Content-Length: 220..Content-Type:
 application/sdp....v=0..o=Sippy 144528972 1 IN IP4 80.232.37
 .178..s=SIP Call..t=0 0..m=image 17772 udptl t38..c=IN IP4
 80.232.37.179..a=T38FaxVersion:0..a=T38MaxBitRate:14400..a=T38FaxRat
 eManagement:transferredTCF..a=T38FaxMaxDatagram:72..

 _______________________________________________
 SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
 sr-users(a)lists.sip-router.org
 http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users 

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

Re: [SR-Users] Re-invite problems with t.38?