论文部分内容阅读
各种传统网络都根据各自的特性建立,并受限于其特性。每种应用网(如电视广播、区域网络互联、电视电话、低速数据线路等)都分别使用各自的数据网、独立的电缆、独立的组织以及独立的管理系统。 过去使用的准同步数字系列(PDH)的缺点是所使用的信道容量能引起网络时间的丢失,最多时可达最佳水平的70％。由于信道容量的人工调配较耗时间,导致各
Various traditional networks are based on their own characteristics and are limited by their characteristics. Each application network (eg, TV broadcasts, LAN interconnection, videophones, low-speed data lines, etc.) uses its own data network, separate cables, independent organizations, and separate management systems. The disadvantage of the PDH used in the past is that the channel capacity used can cause loss of network time up to 70% of the optimal level. As the channel capacity of the manual deployment of more time-consuming, leading to each