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Note
titleA, B, C, D tones

Make sure to expect (and handle) the DTMF tones A , B , C , and D; these are very rare nowadays but they are still possible to send (e.g., someone has an old device with the extra ABCD column). See DTMF for more.

dtmf_type

string For inband DTMF, start_dtmf must be used in the dialplan.

Usage

Code Block
languagexml
themeConfluence
<action application="set" data="dtmf_type=info"/>


Code Block
languagexml
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<action application="set" data="dtmf_type=rfc2833"/>

Status
colourYellow
titleTODO
 RFC 2833 is obsoleted by RFC 4733.

Code Block
languagexml
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<action application="set" data="dtmf_type=none"/>