Opal Internet uses AOPRE-LINK8248、AOPRE-LINK8880、AOPRE-LINK8119、AOPRE-LINK8129、AOPRE-LINK8149 in the solution.According to each urban security monitoring point, fixed-point cameras, fast balls, decoders, alarm probes and other equipment are installed to gather video and audio signals to the optical fiber convergence point of the police station through optical fiber, and transmit digital video to the remote branch monitoring center, so as to ensure that the monitoring of each monitoring point is in place and improve the efficiency of network data transmission.