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前言公路无线电话网属于陆地移动通信范畴,是应用无线电台,通过无线信道,以无线电波形式传递语音等信息。它可以实现固定点对固定点、固定点对移动体或移动体相互间的通信。陆地移动通信在国外已有几十年的历史。近年来,美国、日本、瑞典、加拿大等国家发展很快。尤其美国最为发达,据1980年统计,美国汽车无线电话,已超过100万用户。我国移动通信设备在产品性能和设备配套等方面,虽然发展较快,但与移动通信技术发达国家相比还存在较大差距,尤其公路通信比较落后,给生产调度、交通管理带来十分不便。为解决公路交通通信难的问题,我们与辽宁省交通科研所等单位在大连地区共同研究完成该无线电话网。本文将分(一)、(二)两部分就大连地区公路无线电话网的设计、无线电话自动录音和汽车同步鸣笛器、无线电话人工交换机、无线电话有线遥控系统等进行简要介绍。
Preface Road wireless telephone network belongs to the field of land mobile communications, is the application of radio stations, through the wireless channel to transmit voice and other information in the form of radio waves. It can achieve a fixed point to a fixed point, a fixed point of mobile or mobile communications between each other. Land mobile communications have been in foreign countries for several decades. In recent years, the United States, Japan, Sweden, Canada and other countries developed rapidly. In particular, the United States is the most developed. According to the statistics of 1980, the number of U.S. car radiotelephones has exceeded 1 million. Although China’s mobile communication equipment develops rapidly in terms of product performance and equipment support, there is still a big gap compared with developed countries in mobile communication technology. In particular, the road communication is relatively backward, which brings great inconvenience to production scheduling and traffic management. In order to solve the problem of difficult road traffic communication, we and Liaoning Provincial Transportation Research Institute and other units in Dalian jointly study the completion of the wireless telephone network. This article will be divided into (a), (b) of the two parts of the design of the highway wireless telephone network in Dalian, wireless telephone automatic recording and car synchrophone, wireless telephone hand switches, wireless telephone wired remote control system and so on.