1, wired media: twisted pair, coaxial cable and optical fiber. Wireless transmission media: microwave, infrared, laser or satellite.
2, wired media twisted pair cable price is low, low transmission speed; Compared from anti-interference and price, coaxial cable is between twisted pair and optical fiber; Optical fiber has the advantages of low attenuation of optical signal, high bandwidth and strong anti-interference ability. Wireless transmission medium is electromagnetic wave transmitted through the atmosphere.
3, the maintenance of the wired communication link needs to be checked along the road, when the fault occurs, it is generally difficult to find the fault point in time, and the use of wireless data transmission mode only needs to maintain the data transmission module, when the fault occurs, it can quickly find the cause and restore the normal operation of the line.