现在地球上几乎所有的海洋都已敷设了连接有中继器的宽带海底电缆。这仅涉及一种单根同轴电缆,经过这种同轴管,以不同的运载方式双向传送有用信号,同时也给中继器供电。自从陆地通信使用光纤以来,许多研究实验室从事研究和试验光纤用于海底电缆的可能性。虽然中继器的远距离供电也许在将来还少不了一条金属 Now almost all of the world’s oceans have laid a broadband submarine cable connected to a repeater. This involves only a single coaxial cable through which coaxial signals are transmitted bi-directionally in different ways and also powering the repeater. Since the use of optical fibers for land-based communications, many research laboratories have been engaged in the research and testing of fiber optics for the possibility of submarine cables. Although the remote power supply repeaters may not have a metal in the future