def node_restore_all(self, flag=0) :
    """
        Restores a all device from the configuration in ISY

        args :
            flag             0 or 1

        Flag :
            0 = All shall be restored from the configuration files in ISY
            1 = Does not regenerate groups/scenes - good for testing

        raise:
            IsyResponseError :  if Error in ISY responce
    """
    return self.soapcomm("RestoreDevices", flag=flag)