[asterisk-bugs] [Asterisk 0016445]: Inband DTMF begin event not fired correctly

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=16445 
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Reported By:                frawd
Assigned To:                
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Project:                    Asterisk
Issue ID:                   16445
Category:                   Channels/General
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     acknowledged
Asterisk Version:           1.4.28-rc1 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2009-12-15 08:30 CST
Last Modified:              2009-12-16 08:36 CST
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Summary:                    Inband DTMF begin event not fired correctly
Description: 
When a channel is configured to send DTMF as Inband (SIP, DAHDI, ...), a
"DTMF begin" event is missing, leading to several errors in regenerated
DTMF length and/or sometimes duplicate or missing DTMF.
Tested on 1.4.26, 1.4.27 and 1.4.28-rc1

Maybe has some relation to bug: https://issues.asterisk.org/view.php?id=16243,
apparently working in 1.6.1.9 but
never fixed in 1.4 branch..

An explanation on: http://oss.alea-soluciones.com/trac/wiki/AsteriskDTMF
Check out section "Incorrect regeneration of DTMFs when conversion from
inband to rfc2833"
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Relationships       ID      Summary
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related to          0011968 [patch] DSP cleanup phase 2
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 (0115324) frawd (reporter) - 2009-12-16 08:36
 https://issues.asterisk.org/view.php?id=16445#c115324 
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Is there an easy way to apply just the part that detects DTMF begin
events?

Right now we're having these issues on SIP and DAHDI lines connected to
special analog equipments (elevators) communicating to their control center
by DTMF.
A good detection and regeneration of Inband DTMF with begin and end events
would resolve lots of issues (even better as I think it can work in
passthrough when detecting begin and end event). 

Issue History 
Date Modified    Username       Field                    Change               
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2009-12-16 08:36 frawd          Note Added: 0115324                          
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