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Summary:ASTERISK-15508: [patch] Missing fallback to audio fax feature when T.38 re-INVITE failed for 1.4
Reporter:Kristijan Vrban (vrban)Labels:
Date Opened:2010-01-25 07:21:20.000-0600Date Closed:2010-06-01 09:54:11
Priority:MinorRegression?No
Status:Closed/CompleteComponents:Channels/chan_sip/T.38
Versions:Frequency of
Occurrence
Related
Issues:
Environment:Attachments:( 0) t38_fallback_to_audio_v2_unlcean_and_experimental.patch
( 1) t38_fallback_to_audio_v3.patch
( 2) t38_fallback_to_audio.patch
Description:When a  T.38 re-INVITE failed with an 488 or 606 answer, we should fallback to audio fax by send a re-re-INVITE without T.38. The function is backported from 1.6 asterisk. Some people say this is a feature, other say that it is a bug that 1.4 does not fallback to audio. Here is the patch.
Comments:By: Leif Madsen (lmadsen) 2010-01-29 15:30:05.000-0600

Russell has agreed this is a bug, so I'm moving this up to Ready for Testing
By: Kristijan Vrban (vrban) 2010-02-09 10:05:10.000-0600

Relationship:
https://issues.asterisk.org/view.php?id=8677
By: Kristijan Vrban (vrban) 2010-02-11 03:42:30.000-0600

this issue is in relationship with:
https://issues.asterisk.org/view.php?id=16795

Without ASTERISK-15597 this patch is only half done
By: Kristijan Vrban (vrban) 2010-02-11 06:14:35.000-0600

hello, the new (high grade experimental) patch is working in my lab, and 1.4 chan_sip procures a fallback to audio fax between a T.38 re-INVITE B-side (a asterisk-1.6 with app_fax) and the A-side that dont talk T.38
By: haggard (haggard) 2010-02-16 05:04:51.000-0600

Hello,

I can confirm that fallback to audio fax after receiving cause 606 is now working with 1.4.29 and this patch.
By: Digium Subversion (svnbot) 2010-06-01 09:54:07

Repository: asterisk
Revision: 266579

U   branches/1.4/channels/chan_sip.c

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r266579 | pabelanger | 2010-06-01 09:54:05 -0500 (Tue, 01 Jun 2010) | 18 lines

Missing fallback to audio fax feature when T.38 re-INVITE failed

When a T.38 re-INVITE failed with an 488 or 606 answer, we should
fallback to audio fax by send a re-re-INVITE without T.38. The
function is backported from 1.6 asterisk.

(closes issue ASTERISK-15597)
Reported by: vrban

(closes issue ASTERISK-15508)
Reported by: vrban
Patches:
     t38_fallback_to_audio_v3.patch uploaded by vrban (license 756)
Tested by: lmadsen, vrban, haggard

https://reviewboard.asterisk.org/r/514/


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http://svn.digium.com/view/asterisk?view=rev&revision=266579