报警联网是固定目标预防非法侵入的重要手段,在运行中,会遇到一些不易排除的故障。报警联网中警情的传输方式目前有三种:第一种是采用直连方式,但这种方式因为投资巨大而已不再使用。第二种是利用无线方式传输,无线方式又分两种:一是利用无线频率、频段进行传输,但现在无线频率 Alarm networking is a fixed target to prevent illegal invasion of an important means in operation, will encounter some hard-to-exclude fault. There are three ways to transmit police intelligence in the police network: The first one is to adopt the direct connection method, but this method is no longer used because of huge investment. The second is the use of wireless transmission, wireless mode is divided into two types: First, the use of wireless frequency, frequency band transmission, but now the wireless frequency