[asterisk-bugs] [Asterisk 0018431]: Regression - T.38 no longer functions

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=18431 
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Reported By:                globalnetinc
Assigned To:                
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Project:                    Asterisk
Issue ID:                   18431
Category:                   Channels/chan_sip/T.38
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     acknowledged
Asterisk Version:           SVN 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): 1.8 
SVN Revision (number only!): 297607 
Request Review:              
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Date Submitted:             2010-12-06 21:43 CST
Last Modified:              2010-12-20 15:59 CST
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Summary:                    Regression - T.38 no longer functions
Description: 
Fax calls fail.  Modems never acan complete the trin.

maxdatagram is ignored

t38pt_udptl=yes,redundancy,maxdatagram=200

is set in the sip.conf file the peers

this is the invite from the ATA
INVITE sip:8884732963 at 172.16.0.4:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.255.2:5060;branch=z9hG4bK-5e239d89;rport
From: The Johnson Company
<sip:4065877430 at 172.16.0.4>;tag=dc054a6d8968ca5bo1
To: <sip:8884732963 at 172.16.0.4>;tag=as78c8bd8c
Remote-Party-ID: The Johnson Company
<sip:4065877430 at 172.16.0.4>;screen=yes;party=calling
Call-ID: 5f8ff155-63701093 at 192.168.255.2
CSeq: 103 INVITE
Max-Forwards: 70
Authorization: Digest
username="4065877430",realm="asterisk",nonce="2a864f78",uri="sip:8884732963 at 172.16.0.4:5060",algorithm=MD5,response="68727e467a7265f353f4528567397463"
Contact: The Johnson Company <sip:4065877430 at 172.16.0.59:5060>
Expires: 30
User-Agent: Linksys/SPA2102-5.2.10
Content-Length: 265
Content-Type: application/sdp

v=0
o=- 2664756 2664756 IN IP4 172.16.0.59
s=-
c=IN IP4 172.16.0.59
t=0 0
m=image 16446 udptl t38
a=T38FaxVersion:0
a=T38MaxBitRate:14400
a=T38FaxRateManagement:transferredTCF
a=T38FaxMaxBuffer:200
a=T38FaxMaxDatagram:200
a=T38FaxUdpEC:t38UDPRedundancy


Here is what comes out of Asterisk to the trunk provider

INVITE sip:18884732963 at 66.62.196.101:5060;transport=udp SIP/2.0
Via: SIP/2.0/UDP 216.166.168.4:5060;branch=z9hG4bK2ba7f248
Max-Forwards: 70
From: "The Johnson Company" <sip:4065877430 at 216.166.168.4>;tag=as1474ad27
To: <sip:18884732963 at 66.62.196.101>;tag=f51b80c154cc3e34cc79c473e7e19ed1
Contact: <sip:4065877430 at 216.166.168.4:5060>
Call-ID: 2119ea362e8f33da1e22c71623993b59 at 216.166.168.4:5060
CSeq: 103 INVITE
User-Agent: Asterisk PBX
Require: timer
Session-Expires: 1800;refresher=uac
Min-SE: 90
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO,
PUBLISH
Supported: replaces, timer
X-asterisk-Info: SIP re-invite (External RTP bridge)
Remote-Party-ID: "The Johnson Company"
<sip:4065877430 at 216.166.168.4>;party=calling;privacy=off;screen=no
Content-Type: application/sdp
Content-Length: 266

v=0
o=root 1572151211 1572151212 IN IP4 216.166.168.4
s=Asterisk PBX
c=IN IP4 216.166.168.4
t=0 0
m=image 14370 udptl t38
a=T38FaxVersion:0
a=T38MaxBitRate:14400
a=T38FaxRateManagement:transferredTCF
a=T38FaxMaxDatagram:788
a=T38FaxUdpEC:t38UDPRedundancy

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---------------------------------------------------------------------- 
 (0129814) globalnetinc (reporter) - 2010-12-20 15:59
 https://issues.asterisk.org/view.php?id=18431#c129814 
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What needs to be done so this can be looked at?  No FAX is an issue.  If
there is something that has not been provided please let me know. 

Issue History 
Date Modified    Username       Field                    Change               
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2010-12-20 15:59 globalnetinc   Note Added: 0129814                          
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