Due to the inherent mobility of vehicles, wireless communication network technology has become the only viable option for data transmission and management operations in vehicle-mounted video surveillance. At present, with the breakthroughs and innovations in 3G/4G communication technologies, 3G/4G wireless mobile technologies have become the mainstream wireless communication technologies in the domestic market. As an integral part of mobile surveillance, vehicle-mounted surveillance systems leverage 3G/4G networks to enable functions such as remote video viewing, remote control, geographic positioning, and voice intercom. These functions satisfy customers' demands for remote video monitoring and emergency command, providing them with on-demand wireless video surveillance services anytime and anywhere. Such systems are widely applied to police patrol vehicles of public security and armed police forces, mobile command vehicles, financial cash transport vehicles and other vehicle types. Meanwhile, subject to the constraints of certain special industry applications, wireless portable surveillance systems can also be adopted to meet user requirements.

For mainstream manufacturers in the industry, a typical vehicle-mounted surveillance system generally consists of three components: vehicle-mounted terminals, 3G/4G networks and monitoring centers. Vehicle-mounted terminals serve as the front-end equipment of wireless vehicle-mounted surveillance systems, which are usually covertly installed in various types of vehicles. The terminal equipment mainly comprises wireless vehicle-mounted terminals, tablet computers, high-definition vehicle-mounted PTZ cameras, vehicle mounting brackets and equipment enclosures, among other devices. Once the system is activated, users can conduct real-time video viewing via tablet computers, control the pan-tilt rotation of vehicle-mounted PTZ cameras, and conduct two-way voice intercom with the back-end monitoring center.