void considerAddingVDNMonitorCallObservers(Object monitored) {
		if ((monitored instanceof TSDevice)) {
			TSDevice monitoredTSDevice = (TSDevice) monitored;
			if (monitoredTSDevice.isPredictiveCallsViaDeviceMonitorSet()) {
				addDeviceObservers(monitoredTSDevice, null, null,
						monitoredTSDevice.callsViaAddressMonitorThreads, true);
			}
		}
	}