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本文首先介绍CCITT一个文件的内容,关于不中断业务检测从属中继器误码率的方法,有的地方作了一些补充说明。在这里提出了一个实现17B/18B码型的电路,最后介绍一个用微处理机控制的监测系统的大致情况。这种方法已为STC公司140Mb/s同轴数字线路系统所采用,并已成为ITT公司定型光纤通信系统FTS—344.7Mb/s的组成部分。
This paper first introduces the contents of a CCITT file, on the non-stop service detection subordinate relay bit error rate method, in some places made some additional instructions. Here is a realization of the 17B / 18B code circuit, and finally introduces the general situation of a microprocessor-controlled monitoring system. This approach has been adopted by STC’s 140Mb / s coaxial digital line system and has become part of ITT’s FTS-344.7Mb / s form factor fiber optic communications system.