[asterisk-bugs] [Asterisk 0013405]: [patch] T38 gateway

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=13405 
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Reported By:                dafe_von_cetin
Assigned To:                
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Project:                    Asterisk
Issue ID:                   13405
Category:                   Applications/app_fax
Reproducibility:            N/A
Severity:                   feature
Priority:                   normal
Status:                     confirmed
Asterisk Version:           SVN 
JIRA:                       SWP-115 
Regression:                 No 
Reviewboard Link:           https://reviewboard.asterisk.org/r/459/ 
SVN Branch (only for SVN checkouts, not tarball releases):  trunk 
SVN Revision (number only!): 140548 
Request Review:              
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Date Submitted:             2008-08-30 16:44 CDT
Last Modified:              2010-03-09 07:29 CST
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Summary:                    [patch] T38 gateway
Description: 
Hi all,

I'm sending you patch containing new application app_faxgateway.c
("FaxGateway") which is able to mediate T30 to T38 and vice versa.
Feature is using spands library (I used spandsp-0.0.4pre18 and
spandsp-0.0.5pre4).

Best regards
Daniel.

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 (0119177) klaus3000 (reporter) - 2010-03-09 07:29
 https://issues.asterisk.org/view.php?id=13405#c119177 
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Hi! I justed uploaded a new patch:

This patch is for 1.6.2.5 - I tried with trunk too but I did not managed
to get anything working with trunk - not even T38 passthrough. Further
trunk has a new fax backend, thus the patch must be ported to this new
frontend.

The new patch is based on asterisk-1.6.2-faxgw.patch. It adds some
handling of T.38 control frames to actually trigger the t38-gateway. I also
reworked the code for better readability. Integration in Dial() was skipeed
as IMO either it should be standalone or directly inplemented in Dial().

I tested:

1. FerrariFaxServer<--DAHDI-->Asterisk<--SIP/T.38-->SPA3102-5.1.10
2. Hylafax/IAXModem<---IAX--->Asterisk<--SIP/T.38-->SPA3102-5.1.10

Both setups, in each case 10 pages in&out, worked.

The only thing I recognized was that fax transmission is always non-ECM
(although the clients are known to support ECM). Maybe the T38 negotiation
parameters needs to be adopted  --> help appreciated. 

Issue History 
Date Modified    Username       Field                    Change               
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2010-03-09 07:29 klaus3000      Note Added: 0119177                          
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