[asterisk-bugs] [Asterisk 0011190]: DTMF minimal duration and Recommendation Q.24

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=11190 
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Reported By:                slavon
Assigned To:                
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Project:                    Asterisk
Issue ID:                   11190
Category:                   Core/Internationalization
Reproducibility:            always
Severity:                   trivial
Priority:                   normal
Status:                     new
Asterisk Version:           1.4.13  
SVN Branch (only for SVN checkouts, not tarball releases): N/A  
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             11-08-2007 01:38 CST
Last Modified:              11-08-2007 08:49 CST
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Summary:                    DTMF minimal duration and Recommendation Q.24
Description: 
Hello.

i see many messages like this
[Nov  8 10:15:23] DTMF[16622]: channel.c:2416 __ast_read: DTMF begin '4'
received on SIP/87.255.5.254-08556448
[Nov  8 10:15:23] DTMF[16622]: channel.c:2420 __ast_read: DTMF begin
ignored '4' on SIP/87.255.5.254-08556448
[Nov  8 10:15:23] DTMF[16622]: channel.c:2353 __ast_read: DTMF end '4'
received on SIP/87.255.5.254-08556448, duration 58 ms
[Nov  8 10:15:23] DTMF[16622]: channel.c:2403 __ast_read: DTMF end '4' has
duration 58 but want minimum 80, emulating on SIP/87.255.5.254-08556448
[Nov  8 10:15:23] DTMF[16622]: channel.c:2442 __ast_read: DTMF end
emulation of '4' queued on SIP/87.255.5.254-08556448

I see what many DTMF < 80ms... i go to google and find
ITU-T Q.24 : Multifrequency push-button signal reception
http://www.itu.int/rec/T-REC-Q.24-198811-I/en

go to last page and see that recommended minimal signal duration = 40ms.
i change 
#define AST_MIN_DTMF_DURATION 40

and my clients is happy =)
Any comments?
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---------------------------------------------------------------------- 
 slavon - 11-08-07 08:49  
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But we have recommendations (Table A, Q.24) and if some people write Soft
(firmware to softphones) and looks to it - Asterisk and "some program" may
not work prop. 

If you think that 80ms its best value - its ok, but i think that if you up
"minimal" value you delete some devices from * support list =)

Maybe discuss again? or its final value? =) 

Issue History 
Date Modified   Username       Field                    Change               
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11-08-07 08:49  slavon         Note Added: 0073381                          
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