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海底同轴传输系统虽然与陆上系统在技术上有许多相似之处,但它是单独进行研制的。表1列出了各国最新的实用化系统。其中美国的SG和SH系统,法国的S—25系统均未详细发表,但已有报道。此外,为实现经济指标,拟采用铝外导体技术,英国业已完成。这些海缆传输方式作为国际通信线路广泛应用,日本使用的时间仅十年左右,经过喷火湾、吴——松山、青函海峡等工程的实践,迅速发展,近期达到了出口的水平。
Although there are many similarities with the land-based systems in the subsea coaxial transmission system, it is developed separately. Table 1 lists the latest practical systems in various countries. Among them, the SG and SH systems in the United States and the S-25 system in France are not published in detail but have been reported. In addition, to achieve economic indicators, the proposed use of aluminum conductor technology, the United Kingdom has been completed. These submarine cable transmission systems are widely used as international communication lines. Japan has only been in operation for about 10 years and has rapidly developed through the practice of such projects as Spitfire Bay, Wu-Matsuyama and the Seikan Channel and has recently reached the level of exports.