diff -r 1a6714c53019 -r cce62ebc198e radioengine/utils/inc/mradiosystemeventdetectorobserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/radioengine/utils/inc/mradiosystemeventdetectorobserver.h	Tue Aug 31 15:15:02 2010 +0300
@@ -0,0 +1,70 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:
+*
+*/
+
+#ifndef MRADIOSYSTEMEVENTDETECTOROBSERVER_H
+#define MRADIOSYSTEMEVENTDETECTOROBSERVER_H
+
+// Class declaration
+/**
+*
+*  Observer for the call and network state. Implementer will be notified each time the state has changed
+*/
+NONSHARABLE_CLASS( MRadioSystemEventDetectorObserver )
+    {
+public:
+
+    /**
+    * This callback notifies when networks comes up.
+    */
+    virtual void NetworkUpCallbackL() = 0;
+
+    /**
+    * This callback notifies when network goes down.
+    */
+    virtual void NetworkDownCallbackL() = 0;
+
+    /**
+    * This callback notifies when call becomes active.
+    */
+    virtual void CallActivatedCallbackL() = 0;
+
+    /**
+    * This callback notifies when call becomes deactive.
+    */
+    virtual void CallDeactivatedCallbackL() = 0;
+
+    /**
+    * This callback notifies when audio resources become available.
+    */
+    virtual void AudioResourcesAvailableL() = 0;
+
+    /**
+    * This callback notifies when audio auto resuming is forbidden.
+    */
+    virtual void AudioAutoResumeForbiddenL() = 0;
+
+    /**
+    * This callback notifies when an error occured
+    * @param aError an error code
+    */
+    virtual void ErrorCallbackL( TInt aError ) = 0;
+
+    };
+
+#endif // MRADIOSYSTEMEVENTDETECTOROBSERVER_H
+
+