diff -r 000000000000 -r 6474c204b198 dom/telephony/ipc/PTelephony.ipdl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/telephony/ipc/PTelephony.ipdl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,101 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set sw=2 ts=8 et ft=cpp : */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+include protocol PContent;
+include protocol PTelephonyRequest;
+include TelephonyTypes;
+
+namespace mozilla {
+namespace dom {
+namespace telephony {
+
+struct EnumerateCallsRequest
+{
+  // empty.
+};
+
+struct DialRequest
+{
+  uint32_t clientId;
+  nsString number;
+  bool isEmergency;
+};
+
+union IPCTelephonyRequest
+{
+  EnumerateCallsRequest;
+  DialRequest;
+};
+
+sync protocol PTelephony {
+  manager PContent;
+  manages PTelephonyRequest;
+
+child:
+  NotifyCallError(uint32_t aClientId, int32_t aCallIndex, nsString aError);
+
+  NotifyCallStateChanged(uint32_t aClientId, IPCCallStateData aData);
+
+  NotifyCdmaCallWaiting(uint32_t aClientId, nsString aNumber);
+
+  NotifyConferenceCallStateChanged(uint16_t aCallState);
+
+  NotifyConferenceError(nsString aName, nsString aMessage);
+
+  NotifySupplementaryService(uint32_t aClientId, int32_t aCallIndex,
+                             uint16_t aNotification);
+
+parent:
+  /**
+   * Sent when the child no longer needs to use PTelephony.
+   */
+  __delete__();
+
+  /**
+   * Sent when the child makes an asynchronous request to the parent.
+   */
+  PTelephonyRequest(IPCTelephonyRequest request);
+
+  RegisterListener();
+
+  UnregisterListener();
+
+  HangUpCall(uint32_t aClientId, uint32_t aCallIndex);
+
+  AnswerCall(uint32_t aClientId, uint32_t aCallIndex);
+
+  RejectCall(uint32_t aClientId, uint32_t aCallIndex);
+
+  HoldCall(uint32_t aClientId, uint32_t aCallIndex);
+
+  ResumeCall(uint32_t aClientId, uint32_t aCallIndex);
+
+  ConferenceCall(uint32_t aClientId);
+
+  SeparateCall(uint32_t aClientId, uint32_t aCallIndex);
+
+  HoldConference(uint32_t aClientId);
+
+  ResumeConference(uint32_t aClientId);
+
+  StartTone(uint32_t aClientId, nsString aTone);
+
+  StopTone(uint32_t aClientId);
+
+  sync GetMicrophoneMuted()
+    returns (bool aMuted);
+
+  SetMicrophoneMuted(bool aMuted);
+
+  sync GetSpeakerEnabled()
+    returns (bool aEnabled);
+
+  SetSpeakerEnabled(bool aEnabled);
+};
+
+} /* namespace telephony */
+} /* namespace dom */
+} /* namespace mozilla */