[asterisk-bugs] [Asterisk 0016473]: [patch] app_background fails to reliably detect DTMF when echocan module is enabled

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=16473 
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Reported By:                alecdavis
Assigned To:                
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Project:                    Asterisk
Issue ID:                   16473
Category:                   Core/PBX
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Asterisk Version:           SVN 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): 1.6.1 
SVN Revision (number only!): 235424 
Request Review:              
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Date Submitted:             2009-12-19 21:31 CST
Last Modified:              2009-12-20 18:39 CST
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Summary:                    [patch] app_background fails to reliably detect DTMF
when echocan module is enabled
Description: 
DTMF is sucessfully detected 100% of the time by disabling the echocan
module by inserting the following line in /etc/modprobe.d/dahdi
  options wct4xxp vpmsupport=0

Seems like app_background and other like applications need to disbale EC
while it's waiting for DTMF digits.
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 (0115491) alecdavis (reporter) - 2009-12-20 18:39
 https://issues.asterisk.org/view.php?id=16473#c115491 
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uploaded bug16473_channel_echocan_switch.diff.txt

adds to 'echocan' parameter to function CHANNEL()

Workaround for our current echocan module issue, we need the echocan for
speech 
calls, but echocan messes with DTMF detection.

dialplan:
[ivr2-bdt-day]
  exten => s,1,Verbose(0,'${CALLERID(num)}' IVR MAIN-DAY)
  <b><u>exten => s,n,Set(CHANNEL(echocan)=0)</u></b>
  exten => s,n,Background(silence/1)
  exten => s,n,Background(bdt/mainbdt-day)
  exten => s,n,Background(silence/5)
  exten => s,n,Verbose(0,'${CALLERID(num)}' Nothing Pressed, Default to
OPERATOR)
  <b><u>exten => s,n,Set(CHANNEL(echocan)=1)</u></b>
  exten => s,n,Dial(${TRUNK}/5066)
... 

Issue History 
Date Modified    Username       Field                    Change               
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2009-12-20 18:39 alecdavis      Note Added: 0115491                          
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