[asterisk-bugs] [Asterisk 0017253]: Inband DTMF Double digits being sent.

[Asterisk Bug Tracker]

The following issue has been SUBMITTED. 
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https://issues.asterisk.org/view.php?id=17253 
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Reported By:                kenlee
Assigned To:                
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Project:                    Asterisk
Issue ID:                   17253
Category:                   Core/RTP
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Asterisk Version:           1.6.1.18 
JIRA:                        
Regression:                 No 
Reviewboard Link:           https://reviewboard.asterisk.org/r/625/ 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!): 230383 
Request Review:              
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Date Submitted:             2010-04-27 12:01 CDT
Last Modified:              2010-04-27 12:01 CDT
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Summary:                    Inband DTMF Double digits being sent.
Description: 
When dtmfmode is set to inband for SIP, and a zap channel is bridged with
the SIP channel, and the user on the zap channel side presses a digit, you
can hear the DTMF digit twice in the audio stream. This happens while
Asterisk is parsing the DTMF. For a fraction of a second, while the end
user generated DTMF is being detected, the DTMF is passed inband. Once the
DTMF is detected Asterisk silences it and regenerates it. Sensitive
machines like auto attendants pick up both the brief end user generated
tone as well as the full length asterisk generated tone and ultimately
perceive each digit twice.
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Issue History 
Date Modified    Username       Field                    Change               
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2010-04-27 12:01 kenlee         New Issue                                    
2010-04-27 12:01 kenlee         Asterisk Version          => 1.6.1.18        
2010-04-27 12:01 kenlee         Regression                => No              
2010-04-27 12:01 kenlee         Reviewboard Link          =>
https://reviewboard.asterisk.org/r/625/
2010-04-27 12:01 kenlee         SVN Branch (only for SVN checkouts, not tarball
releases) => N/A             
2010-04-27 12:01 kenlee         SVN Revision (number only!) => 230383          
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