[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:                     acknowledged
Asterisk Version:           SVN 
JIRA:                       SWP-578 
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:              2009-12-21 11:18 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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 (0115565) alecdavis (reporter) - 2009-12-21 11:18
 https://issues.asterisk.org/view.php?id=16473#c115565 
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Dec 22 06:16:28 astrid kernel: [24869551.561215] VPM450: echo cancellation
for 64 channels
Dec 22 06:16:34 astrid kernel: [24869557.413249] VPM450: hardware DTMF
disabled.
Dec 22 06:16:34 astrid kernel: [24869557.413253] VPM450: Present and
operational servicing 2 span(s)
Dec 22 06:16:34 astrid kernel: [24869557.413257] Completed startup!
Dec 22 06:16:34 astrid kernel: [24869557.416551] About to enter startup!
Dec 22 06:16:34 astrid kernel: [24869557.416551] TE2XXP: Span 2 configured
for CCS/HDB3/CRC4
Dec 22 06:16:34 astrid kernel: [24869557.417509] SPAN 2: Primary Sync
Source
Dec 22 06:16:34 astrid kernel: [24869557.417510] Completed startup! 

Issue History 
Date Modified    Username       Field                    Change               
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2009-12-21 11:18 alecdavis      Note Added: 0115565                          
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