我省幅员辽阔,广大地县大部分地处山区,改造和发展面广、量大、距离远、环境恶劣、基础条件差的山区通信,是我们为社会主义“四化”通信服务的一项重要任务.较长时期以来.我省地专以下电报通信,绝大多数是采用铁幻线人工电报,通报效率低,质量差,不能适应电报通信发展的需要.随着电传机的增多,人工机的减少,幻报电路的质量已明显地不能满足通信的要求.由于载波电报通信有较好的稳定性和抗干扰性,故地县电报电路急待用载波电报来替代幻线电报.由于我省地县间的载波话路普遍紧张,发展载波电报不能只考虑采用“群报”方式,而 The province has a vast territory and most of counties and counties are located in mountainous areas. Mountain communications, which have a wide range of transformation and development, large quantities, long distances, harsh environments and poor basic conditions, are part of our service to the “four modernizations” of socialism An important task.Over the long term, the province below the college telegraphic communications, the vast majority of the use of iron wire artificial telegraph, notification of low efficiency, poor quality, can not meet the telegraph communications development needs.With the increase of teletype, The reduction of artificial machines, the quality of magic video circuit has been clearly unable to meet the requirements of communication.As carrier telegraph communication has good stability and anti-jamming, so the county telegraph circuit urgent need to use telegraph telegram instead of telegraph telegram. Carrier speech channels among counties and prefectures in our province are generally strained and the development of carrier telegraphs can not only consider adopting “group reporting” methods