[asterisk-bugs] [Asterisk 0016389]: [patch] busydetect incorrectly hangs up incoming call due to incoming DTMF seen as busy pattern.

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=16389 
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Reported By:                alecdavis
Assigned To:                alecdavis
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Project:                    Asterisk
Issue ID:                   16389
Category:                   Channels/chan_dahdi
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     assigned
Asterisk Version:           I did not set the version :( 
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:             2009-12-03 17:54 CST
Last Modified:              2009-12-20 02:52 CST
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Summary:                    [patch] busydetect incorrectly hangs up incoming
call due to incoming DTMF seen as busy pattern.
Description: 
We're using WCTDM FXO modules for an IVR application/voicemail to a legacy
PABX.

Users, and the legacy PABX sends DTMF digits, after dialing voice mail.

Users have these programmed into their phones, dial main number then
pause, then dial known extension. The legacy PABX sends DTMF sequences
immediately the call is answered, to advise VoiceMail that the call is from
inside/out, a forwarded call due to non-answer etc.

Asterisk see's these repeated tone on/off patterns as busy signal and
hangs up.
Having busydetect on is required, as with signalling=fxs_ls requires it.
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 (0115472) alecdavis (reporter) - 2009-12-20 02:52
 https://issues.asterisk.org/view.php?id=16389#c115472 
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Console output: Showing user repeatably pressing the "7" key.
With debug print, also with the code commented out that actually resets
the historicsilence and historicnoise buffers.
 
    -- <DAHDI/5-1> Playing 'invalid.gsm' (language 'en')
[Dec 20 21:47:52] WARNING[31440]: dsp.c:1413 ast_dsp_process: DTMF
Detected - Should Reset busydetector
[Dec 20 21:47:52] WARNING[31440]: dsp.c:1413 ast_dsp_process: DTMF
Detected - Should Reset busydetector
[Dec 20 21:47:53] WARNING[31440]: dsp.c:1413 ast_dsp_process: DTMF
Detected - Should Reset busydetector
  == Spawn extension (ivr2-bdt-night, i, 2) exited non-zero on
'DAHDI/5-1'
    -- Executing [h at ivr2-bdt-night:1] Verbose("DAHDI/5-1", "0,'' IVR-NIGHT
 Hangup") in new stack 

Issue History 
Date Modified    Username       Field                    Change               
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2009-12-20 02:52 alecdavis      Note Added: 0115472                          
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