[asterisk-bugs] [Asterisk 0018611]: inband DTMF cannot be detected and trigger service execute when A and B both use u-law (the same codec)

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=18611 
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Reported By:                shihchuan
Assigned To:                
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Project:                    Asterisk
Issue ID:                   18611
Category:                   Core/RTP
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.8.1.1 
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:             2011-01-13 05:04 CST
Last Modified:              2011-01-14 00:26 CST
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Summary:                    inband DTMF cannot be detected and trigger service
execute when A and B both use u-law (the same codec)
Description: 
1. A and B both use the same codec (u-law, a-law).
When A enter *96(transfer feature key), transfer service don't be executed
but B hear dtmf tone.

2. If A and B use different codec.(A use u-law, B use a-law) 
When A enter *96(transfer feature key), transfer sevice is executed.

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 (0130481) shihchuan (reporter) - 2011-01-14 00:26
 https://issues.asterisk.org/view.php?id=18611#c130481 
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Yes, I did have put 'tT' in Dial() in these 2 cases. 

The problem is that,
when using the SAME codec in a conversation, the inband dtmf is not
detected.
I set debug level to 5 but no any debug messages about dtmf is displayed
when using the same codec.

However, if using DIFFERENT codec, debug message:'Got DTMF begin on
channel (SIP/2112-00000027)' will be shown, which is correct. 

Issue History 
Date Modified    Username       Field                    Change               
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2011-01-14 00:26 shihchuan      Note Added: 0130481                          
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