数字中继接口同步性能分析

分析了数字网中产生滑动的３方面原因，即传输系统的工作环境不稳定；失去时钟控制；网路节点的时钟偏差。通过对一种高集成数字中继接口结构的分析，指出数字中继呼损过高的原因之一是由于时钟倍频电路的性能不稳定，即传输系统的工作环境不稳定，从而导致交换系统时钟与传输系统时钟的不同步。为此本文提出了解决该问题的两种方法，且能满足电话业务的滑动率指标的要求

Synchronization performance analysis on digital trunk interface

Three kinds of sliding factors on digital networks are analyzed.The first is non stable about working circumstances in transfer systems.The second is missing of clock control.The last is clock deflection of network node.After discussion of the structure about a large integrated digital trunk interface, one of the reasons of call loosing in clock circuit is pointed out.The bad performance will bring asynchronous problem between switch system clock and transfer system clock.Two ways to solve the problem are presented which give satisfied sliding rate in telephone service.