[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 
Regression:                 No 
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:              2009-07-22 08:25 CDT
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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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 (0108072) dimitripietro (reporter) - 2009-07-22 08:25
 https://issues.asterisk.org/view.php?id=13405#c108072 
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Ok, Here's my test lab : Asterisk SVN-trunk-r207680M, CentOS 5 and
spandsp-0.0.6pre12: 

<Brother MFC8220> -- <SPA2102> -- <Asterisk> -- <TDM410> -- <PSTN> ---
<FAX 2>

[GENERAL]
t38pt_udptl = yes,redundancy

udptl.conf
udptlstart=4000
udptlend=4999
T38FaxUdpEC = t38UDPRedundancy
T38FaxMaxDatagram = 400
udptlfecentries = 3
udptlfecspan = 3

extensions.conf
[faxt38]
exten => _X.,1,FaxGateway(DAHDI/G0/${EXTEN})

Asterisk and the ATA are on the same network. With or without T.38 the fax
passtrought. But when I activate T.38 I can see the channel switching to
T.38 but at the end always get : 

[Jul 22 09:10:41] DEBUG[24819]: chan_dahdi.c:3925 dahdi_disable_ec:
Disabled echo cancellation on channel 3
[Jul 22 09:10:41] NOTICE[24819]: app_fax.c:976 ast_t38_gateway: T.38
gateway exitting - channel hang up.
[Jul 22 09:10:41] DEBUG[24819]: app_fax.c:983 ast_t38_gateway: Connection
Statistics
        Bit Rate :9600
        ECM : No
        Pages : 1
[Jul 22 09:10:41] WARNING[24819]: app_fax.c:1210 t38gateway_exec:
Transmission failed
[Jul 22 09:10:41] DEBUG[24819]: channel.c:2133 ast_hangup: Hanging up
channel 'DAHDI/3-1'

Even if it's say transmission fail, I don't know what to think about it.
The transmission when throught no problem. 

Issue History 
Date Modified    Username       Field                    Change               
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2009-07-22 08:25 dimitripietro  Note Added: 0108072                          
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