[asterisk-bugs] [Asterisk 0015096]: DTMF occurs in every calls without user press keyboard of telephone

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=15096 
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Reported By:                rodrigopassos
Assigned To:                
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Project:                    Asterisk
Issue ID:                   15096
Category:                   Core/PBX
Reproducibility:            random
Severity:                   major
Priority:                   normal
Status:                     new
Asterisk Version:           1.4.24 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2009-05-13 10:29 CDT
Last Modified:              2009-05-21 21:56 CDT
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Summary:                    DTMF occurs in every calls without user press
keyboard of telephone
Description: 
When a call is in progress in my PBX Server, all side of that call, listen
one beep. This beep is a dtmf.  This DTMF is aleatory, and when PBX stay
over demand, this problem occurs with more frequence. All devices, IP
Phone, ATA and TE420P can listen this DTMF, and when a do call, the problem
occurs when this call is between sip to sip, sip to pstn and pstn to sip.
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 (0105275) rodrigopassos (reporter) - 2009-05-21 21:56
 https://issues.asterisk.org/view.php?id=15096#c105275 
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This problem occurs in all calls. I have 150 (ATA) of the chinese
manufacturer 30 IP Phones Grandtstream BT201 and 5 IP Phones Grandstream
BT1200. The DeadAGI is in using alone to solve a problem with Asterisk CDR,
becouse the transfer attended transfer and blind transfer has problems in
creation of the consistent CDR information.
I did a test to more simple in initial instalation, but the problem
persist. From that time to come, I do many, many search in the Internet and
i don´t find the solution. The initial instalation, I did in 1.4.23
version, after, I did one downgrade to 1.4.22 and now using 1.4.24. I
don´t know what more I do to solve my problem. I did one analysis with
tcpdump, and I open this packet captured in Wireshark to see where this
DTMF is generated and i can see the DTMF is generate in the packet sent by
the ATA to Asterisk, and in the rebuild of the RTP packet, I can listen in
the packet sent by the Asterisk to ATA and this is obvious. Do you know if
the dmtf rfc2833 could be sent one incorrect information to Asterisk?
The packets captured could be see in Dump_Fidelity.pdf. 

Issue History 
Date Modified    Username       Field                    Change               
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2009-05-21 21:56 rodrigopassos  Note Added: 0105275                          
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