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本文综述了有关数字通信网,网同步的若干问题。提出了数字通信三种同步方式的区别。介绍了网同步的四种方法及主要特点。介绍了国际和国内网的网同步技术,提出国内数字网同步最好采用具有准同步工作能力的等级主从同步网。最后,介绍了CCITT数字网研究组近年来对网同步提出的一些主要技术指标要求。
This article summarizes several issues related to digital communications networks and network synchronization. Proposed the difference of three kinds of synchronous ways of digital communication. Introduced the four methods of network synchronization and the main features. Introduced the network synchronization technology of the international and domestic networks, and proposed that the domestic digital network synchronization should preferably adopt the level master-slave synchronization network with the capability of quasi-synchronization work. Finally, some major technical indicators proposed by CCITT Digital Network Research Group in recent years are introduced.