With the rapid economic and social development, the floating population continues to gather, the urban population and the urban-rural fringe are expanding rapidly, and the community population is becoming more and more complex. This has led to the occurrence of a large number of public security and criminal cases. The community public security situation is facing severe challenges. Criminals' methods of committing crimes are becoming more intelligent, technical, complicated and violent, making it difficult for traditional civil defense, physical defense, and passive technical defense methods to adapt to the management requirements of the new situation. The use of advanced information technology to realize intelligent city management and operation can create a better and safer life for the public and promote the harmonious and sustainable development of the city. 

TOP-TEK provides an interface layout with silly design, plug and play, and quick camera connection; rich network management, distributed high-efficiency management of many network devices; IP40 protection, dual power input, relays alarm output etc., these powerful, reliable and adaptable communication devices in various environments, guarantee the construction and operation of smart cities.

The working principle is shown in the figure below: