{

    /** 

    * Protected destructor. Object cannot be deleted from client.

    * @since S60 3.2

    */

    virtual ~MCCETransferInterface() {};

    /**

    * Attended transfer to given address. 

    * Actual result like status, events and errors come via MCCECallObserver class.

    * Afterwards both calls will be disconnected from CCE side.

    * @param aTransferTarget Transfer target address. Always takes active call, address is not used

    * at the moment!

    * @return KErrArgument transfer address was illegal.

    * @return KErrNotFound existing active call was not found with given address. 

    * @return KErrNotReady if this call is not on-hold state and the other in connected state

    * @return KErrNotSupported Current plug-in does not support transfer functionality.

    * @pre Two calls exist. This call is in state MCCECallObserver::ECCEStateHold and the other in 

    * MCCECallObserver::ECCEStateConnected

    * @since S60 3.2

    */

    virtual TInt AttendedTransfer( const TDesC& aTransferTarget ) = 0;

    /**

    * Unattended transfer to given address. Call is requested to be transferred to given address.

    * Afterwards call will be disconnected from CCE side. If transfer fails a new incoming call 

    * will be received to reconnect to recipient. Reconnected call is initiated from recipient end.

    * Actual result like status, events and errors come via MCCECallObserver class.

    * This is not used for CS.

    * @since S60 3.2

    * @param aTransferTarget Address of the target

    */

    virtual TInt UnattendedTransfer( const TDesC& aTransferTarget ) = 0;

    /**

    * Accept incoming unattended transfer request from the call remote party.

    * @since Series 60 3.2

    * @param aAccept Boolean value is transfer accepted or not.

    */

    virtual TInt AcceptTransfer( const TBool aAccept ) = 0;

    /**

    * @since Series 60 3.2

    * @param none

    * @return New recipient for the call after transfer

    */

    virtual const TDesC& TransferTarget() const = 0;

    };