I add this to tk10x server vode and realize run this function by special command to server.

    // ------------------------------------------------------------------------

    private byte[] CheckDevicesFunction(String s)
    {
    	Print.logWarn("CheckDevicesFunction Realization\n");

    	long TimeStampDiffConst = 1000;

    	String fld[] = StringTools.parseString(s, ',');

    	String mobileID = null;
    	mobileID = StringTools.trim(fld[1]);
        if (StringTools.isBlank(mobileID)) {
            Print.logError("'imei:' value is missing");
            return null;
        }
        long serverTimeStamp = StringTools.parseLong(fld[2], 0L);
        Print.logInfo("******Server Event Timestamp  : " + serverTimeStamp);

        Device device = DCServerFactory.loadDeviceByPrefixedModemID(UNIQUEID_PREFIX, mobileID);
        if (device == null) {
            return null; // errors already displayed
        }
        long ReadLastEventTimestamp = device.getLastEventTimestamp();
        Print.logInfo("******Read Last Event Timestamp  : " + ReadLastEventTimestamp);

        if (( serverTimeStamp - ReadLastEventTimestamp ) > TimeStampDiffConst)
        {
        	if (device.getDeviceLostSignal() == true)
        	{
        		// we already send notification, signal level not restored
        		device.setNotificationFlag(true);
        		Print.logInfo("******Notification already send, not sending twice\n ");
        	}
        	else
        	{
        		device.setDeviceLostSignal(true);
        		device.setNotificationFlag(false);
        		Print.logInfo("******Notification not yet send, setting flag to notification\n ");
        	}
        } else
        {
        	device.setDeviceLostSignal(false);
        	device.setNotificationFlag(true);
        	Print.logInfo("******Device not losting signal\n ");
        }
        /* save device changes */
        try {
            //DBConnection.pushShowExecutedSQL();
            device.updateChangedEventFields();
        } catch (DBException dbe) {
            Print.logException("Unable to update Device: " + mobileID, dbe);
        } finally {
            //DBConnection.popShowExecutedSQL();
        }
        return null;
    }