[asterisk-bugs] [Asterisk 0012849]: DTMF detection issue in GSM gateway

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=12849 
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Reported By:                jankrishnan
Assigned To:                
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Project:                    Asterisk
Issue ID:                   12849
Category:                   Addons/General
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           1.4.17 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             06-13-2008 03:54 CDT
Last Modified:              06-14-2008 09:33 CDT
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Summary:                    DTMF detection issue in GSM gateway
Description: 
I am using the GSM gateway(MV-370) for communication with mobile network
from asterisk. In detail,
SIM card is placed in MV-370,
Configured one sip account for this gateway in asterisk, so whenever i
making the from outside to this gateway, it will be landed on configured
sip account. I designed the dialplan is such a way to get the dtmf(Read()
application in asterisk) from the remote end. But, here when pressing the
dtmf digits from remote end, it is not detected. Always saying that no
digits has been pressed,

sip.conf configuration,
;GSM VOIP Gateway MV-370
[103]
type=friend
username=103
secret=103
context=gateway
dtmfmode=inband
host=dynamic
nat=never
canreinvite=no
insecure=very
qualify=yes
disallow=all
allow=ulaw
allow=alaw

in the above i tried with the dtmfmode as info and rfc2833, but i got the
same result.

could you please direct or suggest me in a right direction?

Thanks in advance,
jankrishnan
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---------------------------------------------------------------------- 
 Corydon76 - 06-14-08 09:33  
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You might try recording the audio with Monitor or MixMonitor and listen to
the stream to see if you're hearing the DTMF at all.  You could also turn
on DTMF logging in logger.conf to see if Asterisk is detecting any in the
stream.

Several GSM gateways have a history of generating DTMF tones that are not
to-spec.  It's also possible that when changing the DTMF type, the gateway
needs a reboot before it will start delivering the different method of
DTMF. 

Issue History 
Date Modified   Username       Field                    Change               
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06-14-08 09:33  Corydon76      Note Added: 0088713                          
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