RTCRtpSender interface provides the ability to control and obtain details about how a particular
MediaStreamTrack is encoded and sent to a remote peer.
With it, you can configure the encoding used for the corresponding track, get information about the device's media capabilities, and so forth. You can also obtain access to an
RTCDTMFSender which can be used to send DTMF codes (to simulate the user pressing buttons on a telephone's dial pad) to the remote peer.