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英国电信局1985年开始在英国敷设许多条有线电视系统。其中一条敷设在伦敦威斯敏斯特,它由英国电信实验室研制,为星形交换型。该网在前端和安装在箱内的交换开关之间使用光缆,在开关和用户之间使用同轴电缆。已研制出了许多户外设备,以满足在威斯敏斯特的特殊敷设要求。上述这一工程,以及在英国电信局干线网和中继网中敷设光纤所获得的经验,为发展线路设备奠定了完美的基础,而这些线路设备是使英国电信局能把单模光纤引入局部网所必需的。几家英国公司正在研制适合于敷设在局部网苛刻环境中的一系列光缆。正在采用供地下及电话局内和用户房屋内用的连接盒和机动分支。此外,正在用吹引光纤敷设技术把光纤用于这些网络。
The British Telecommunications Authority began laying many cable television systems in the United Kingdom in 1985. One of them is laid in Westminster, London, developed by the British Telecom Laboratory for the star exchange type. The network uses a fiber optic cable between the front end and the exchange switch installed in the box and a coaxial cable between the switch and the user. A number of outdoor equipment have been developed to meet the special laying requirements in Westminster. The above project, as well as the experience gained in laying fiber in the trunk and trunk networks of the BT Bureau, provide the perfect basis for the development of line equipment that enables the BTT to introduce single-mode fibers locally Necessary network. Several UK companies are developing a series of fiber optic cables suitable for deployment in harsh local network environments. Connecting boxes and motorized branches for use inside and outside the telephone office and in the user’s premises are being used. In addition, optical fiber is being used in these networks by means of fiber-optic laying technology.