RTCDTMFSender interface provides a mechanism for transmitting DTMF codes on a WebRTC
RTCPeerConnection. You gain access to the connection's
RTCDTMFSender through the
RTCRtpSender.dtmf property on the audio track you wish to send DTMF with.
The primary purpose for WebRTC's DTMF support is to allow WebRTC-based communication clients to be connected to a public-switched telephone network (PSTN) or other legacy telephone service, including extant voice over IP (VoIP) services. For that reason, DTMF can't be used between two WebRTC-based devices, because there is no mechanism provided by WebRTC for receiving DTMF codes.
DOMStringwhich contains the list of DTMF tones currently in the queue to be transmitted (tones which have already been played are no longer included in the string). See
toneBufferfor details on the format of the tone buffer.
EventHandlerto handle the
tonechangeevent, which is sent each time an outbound tone starts or finishes playing.
insertDTMF()starts sending the specified tones. Calling
insertDTMF()replaces any already-pending tones from the
toneBuffer. You can abort sending queued tones by specifying an empty string (
"") as the set of tones to play.
|WebRTC 1.0: Real-time Communication Between Browsers |
The definition of 'RTCDTMFSender' in that specification.
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