The cameras on the road need to pass through the underlying Ethernet transmission channel in order to transmit the relevant captured pictures and videos and other traffic data collected on site to the central platform. The basic network channel consists of a variety of switches and routers, uploaded through layers of links, these basic communication and computing equipment in the outdoor operating environment is relatively harsh, even if installed in the box is still subject to the sun and rain, including vehicle metal dust and humid climate, as well as a variety of electromagnetic field interference. Therefore, building a stable network channel becomes particularly important. If the use of traditional ordinary commercial switches and low-end industrial switches, although it seems to be able to short-term reduction of some economic costs, but according to our more than a decade of cooperation with various types of users and weak power integrators have found that ordinary low-end commercial or industrial switches are generally false parameters, in the harsh outdoor environment is not stable enough to operate, due to the accumulation of dust, condensation, high-temperature environments and lightning strikes, etc., resulting in malfunctions and even not to the warranty period. Damage is very common, which leads to high personnel and material costs on both sides, and often leads to business interruption of images and signals.