Taking the network digital surveillance system as an example, installing surveillance equipment requires cameras, video recorders, monitors or monitors, switches, routers, network cables, power cables, crystal heads, camera brackets and camera power supplies. Buy 30 megapixel camera is better, the camera is the most important thing is the actual use, enough on the line, and the current market of real 30 megapixel camera is the most applicable.
1, camera
Camera (CAMERA or WEBCAM), also known as computer camera, computer eye, electronic eye, etc., is a video input device, is widely used in video conferencing, telemedicine and real-time monitoring. Ordinary people can also talk and communicate with each other via webcam on the Internet with images and sound.
2, VCR
is for the recording of television images and accompanying sound, can store video signals of television programs, and after they can be re-transmitted to the television transmitter or directly to the television set in the tape recorder.
3, monitor
Often also known as a monitor. A monitor is an I/O device that belongs to a computer, i.e., an input-output device. It is a display tool that displays a certain electronic file through a specific transmission device to the screen and then reflected to the human eye. According to the different manufacturing materials, can be divided into: cathode ray tube display (CRT), plasma display PDP, liquid crystal display LCD and so on.
4, switch
Switch (Switch) means "switch" is a network device for electrical (optical) signal forwarding. It can access the switch for any two network nodes to provide an exclusive electrical signal path. The most common type of switch is the Ethernet switch. Other common ones are telephone voice switches and fiber optic switches.
5, router
is connected to the Internet in the local area network, wide area network equipment, it will be based on the channel automatically select and set up routing, to the best path, in order to send signals before and after the order. At present, the router has been widely used in all walks of life, a variety of different grades of products have become the realization of a variety of backbone network internal connection, backbone network interconnection and backbone network and the Internet interconnection and interoperability of the business of the main force.