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The sendTones() method of the Telephony Interface generates multiple DTMF tones, with a specified duration for each tone, and an optional delay before generation starts. The tones are sent to the currently active call.
API B2G Certified DOM Firefox OS Method Mobile Non-standard Reference Référence sendTones Telephony


The startTone() method of the Telephony Interface begins generating the tone for the specified DTMF character. The tone is sent to the currently active call, and continues to sound until a corresponding call to Telephony.stopTone().
API B2G DOM DOM Reference Firefox OS Method Mobile Reference Référence Telephony WebAPI


The state read-only property of the TelephonyCallGroup interface returns a DOMString indicating the state of the call group.
API B2G Certified Firefox OS Mobile Non-standard Property Reference Référence State state Telephony TelephonyCallGroup

Media formats supported by the HTML audio and video elements

The <audio> and <video> elements provide support for playing audio and video media without requiring plug-ins. Video codecs and audio codecs are used to handle video and audio, and different codecs offer different levels of compression and quality. A container format is used to store and transmit the coded video and audio (both together, the case of a video with a soundtrack). Many combinations of codecs and container formats exist, although only a handful of these are relevant on the Web.
file formats Firefox HTML HTML5 Media media formats Reference Video video


The CallEvent interface of the Web Telephony API represents events related to telephone calls.
API B2G CallEvent Event Events events Firefox OS Interface Mobile Non-standard Reference Référence Telephony WebAPI