[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 08:40 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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---------------------------------------------------------------------- 
 file - 11-08-07 08:40  
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This was discussed on the asterisk-dev mailing list a few months ago.
Originally we had it set at 100ms but dropped it to 80ms after
documentation and experience from others was provided to indicate that was
the "best" duration. 

Issue History 
Date Modified   Username       Field                    Change               
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11-08-07 08:40  file           Note Added: 0073378                          
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