... 3,reliable and long-lived 4,3-inch LCD video outdoor phone Achieve Functional:1, the sale point of call the ... of video door bell : through the indoor phone, Management center, set the door-phone related-parameters.8, Remote Upgrade: the system ... ,3,home Security Systems, such as: video indoor phone / video outdoor phoneoptional systems4,home wiring systems,5,home network systems ( TCP ...