I Changed my default DTMF Mode to RFC2833 but I Still Having Problems with the DTMF (Using Asterisk)

If you have upgraded Asterisk to 1.4 version you might have problems with the DTMF. To fix this issue you should add to sip.conf the parameter 'rfc2833compensate=yes' to fix the DTMF issue.

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KB » Troubleshooting» DTMF