[asterisk-bugs] [Asterisk 0011614]: [patch] T38 support for SendFax/ReceiveFax

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=11614 
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Reported By:                dimas
Assigned To:                file
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Project:                    Asterisk
Issue ID:                   11614
Category:                   Addons/New Feature
Reproducibility:            always
Severity:                   feature
Priority:                   normal
Status:                     assigned
Asterisk Version:            SVN 
SVN Branch (only for SVN checkouts, not tarball releases):  trunk 
SVN Revision (number only!): 497 
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             12-21-2007 06:57 CST
Last Modified:              01-12-2008 09:01 CST
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Summary:                    [patch] T38 support for SendFax/ReceiveFax
Description: 
Adding T38 support to SendFax/ReceiveFax applications. See Additional
Information for details.

There are two patches:
* appfax-v3.patch for asterisk-addons/trunk rev 497 - modifications to the
fax application
* asterisk-t38.patch - temporary (see below) patch for asterik/trunk
revision 94396

!IMPORTANT NOTE! This patch is considered work in progress because it
depends on not yet finished feature of Asterisk - ability to request T38
reinvite on a SIP channel.
Currently, the patch adds this ability itself (asterisk-t38.patch) but it
adds it in a very rude way. It is clearly a hack. When file finishes his
t38insanity branch and Aterisk will get official way of requesting
re-invite, I will update app_fax to use that way instead and
asterisk-t38.patch won't be needed anymore.

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---------------------------------------------------------------------- 
 irroot - 01-12-08 09:01  
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here is somthing related id like to throw out here ...

could it be possible to set/introduce a codec AST_FORMAT_T38FAX as a
possible codec and use this as the channels codec when T38 is negotiated
this way we can write a codec_t38 that will perform the transcoding bits
using steves T38 gateway bits in spandsp.this will keep the digium codebase
clean from a licencing point of view as this codec can be added to the
addons where send/recive fax is at the moment.

basicaly what a codec translator seems to do is convert a format back and
forward into SLIN that is what the t38_gateway code does so i see this as a
good marrige and the right place to put the T38 gateway bits.

this will allow calls to/from a T38 device to pass via any channel ie
Zap/mISDN with no changes required to the asterisk core if the translator
module is loaded (addons) 

Issue History 
Date Modified   Username       Field                    Change               
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01-12-08 09:01  irroot         Note Added: 0076798                          
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