[asterisk-bugs] [Asterisk 0013209]: DTMF RFC2833 via SIP is not working

Tue Dec 9 13:47:08 CST 2008

A NOTE has been added to this issue. 
====================================================================== 
http://bugs.digium.com/view.php?id=13209 
====================================================================== 
Reported By:                ip-rob
Assigned To:                file
====================================================================== 
Project:                    Asterisk
Issue ID:                   13209
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     ready for review
Asterisk Version:           1.4.21.2 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
====================================================================== 
Date Submitted:             2008-07-31 08:23 CDT
Last Modified:              2008-12-09 13:47 CST
====================================================================== 
Summary:                    DTMF RFC2833 via SIP is not working
Description: 
Using provider bandwidth.com which support RFC2833.  Configure outbound
trunk to use dtmfmode=rfc2833 and we receive double digits on a different
asterisk servers IVR.  American Express IVR does not accept any digits
(used main customer service line to test entering credit card number). 
Other IVR functions do not work.

Changing to inband works but inband should not be required by
bandwidth.com, they support rfc2833.

Configuration is using SIP devices and SIP trunks only.  A search in issue
tracker found similar problems in January of 2008 but no currently open
issues.
======================================================================
Relationships       ID      Summary
----------------------------------------------------------------------
has duplicate       0013458 [patch] Timestamp in DTMF does not matc...
related to          0013265 RFC2833 mangled from Sonus when RTP str...
====================================================================== 

---------------------------------------------------------------------- 
 (0096025) svnbot (reporter) - 2008-12-09 13:47
 http://bugs.digium.com/view.php?id=13209#c96025 
---------------------------------------------------------------------- 
Repository: asterisk
Revision: 162204

U   branches/1.4/main/rtp.c

------------------------------------------------------------------------
r162204 | file | 2008-12-09 13:47:03 -0600 (Tue, 09 Dec 2008) | 7 lines

Make sure that the timestamp for DTMF is not the same as the previous
voice frame and do not send audio when transmitting DTMF as this confuses
some equipment.
(closes issue http://bugs.digium.com/view.php?id=13209)
Reported by: ip-rob
Patches:
      13209.diff uploaded by file (license 11)
Tested by: ip-rob, bujones

------------------------------------------------------------------------

http://svn.digium.com/view/asterisk?view=rev&revision=162204 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2008-12-09 13:47 svnbot         Checkin                                      
2008-12-09 13:47 svnbot         Note Added: 0096025                          
======================================================================