WebAPI/WebTelephony

Proposed API

navigator.telephony would return an object with the following interface

 interface Telephony : EventTarget {
   TelephonyCall dial(DOMString number); // Returns a object in "dialing" state
   attribute boolean muted;           // Should these live on the call/group?
   attribute boolean speakerOn;
   attribute double speakerVolume;
   attribute boolean doNotDisturb;    // Automatically drops calls. Not sure if needed. Only seems needed
                                      // if supported as a network feature.
 
   attribute any active; // Either a call or a group
 
   readonly attribute TelephonyCall[] liveCalls;
   readonly attribute CallGroup[] liveGroups;
 
   void startTone(DOMString tone);
   void stopTone();
   void sendTones(DOMString tones,
                  [optional] unsigned long toneDuration,
                  [optional] unsigned long intervalDuration);
 
   attribute Function onincoming;
 }
 
 interface TelephonyCall : EventTarget {
   readonly attribute DOMString number;
 
   readonly attribute DOMString readyState;
   // "dialing", "ringing", "busy", "connecting", "connected", "disconnecting", "disconnected", "incoming"

   attribute Function onreadystatechange;
   attribute Function onringing;
   attribute Function onbusy;
   attribute Function onconnecting;
   attribute Function onconnected;
   attribute Function ondisconnecting;
   attribute Function ondisconnected;
   
   void answer(); // Should this make the call the active one?
   void disconnect();
 
   // void hold(); These need to be made async. Also not sure if they are needed with a proper async 3-way API
   // void resume();
 }
 
 interface CallEvent : Event {
   readonly attribute TelephonyCall call;
 }