Abstract: An intelligent street light includes a lamppost and a data transmission system provided at the bottom of the lamppost. The data transmission system includes a data transmission unit, a data exchange unit and a plurality of network devices, which are connected to each other. The data transmission system allows data transmission to be performed between itself and a remote server. This can improve utilization of public resources, reduce construction costs and shorten construction periods of base stations, and effectively enhance coverage of communication signals to improve the quality of communication.

Abstract: An intelligent street light structure includes an antenna, a data transmission system and wires. This makes the intelligent street light structure have a remote data transmission function and also effectively protect the antenna and the data transmission system provided therein again external invasion.

Abstract: A network switching system is used for monitoring an operation status of an in-line device, including an operating voltage of a hardware unit of the in-line device, an operating system running in the in-line device and at least one application running in the operating system. Once an abnormal status is detected in any of the operating voltage of the hardware unit, the operating system and the application, the network switching system switches a working mode of the in-line device from a normal mode to a bypass mode, to ensure normal communication between first and second network devices connected to the in-line device.