Graph models for T arid S switches and methods for analysing T switches in digital switching networks are presented in the paper. They provide a. theoretical basis for fault diagnosis of speech path subsystems in digital SPC switching systems.

• 本文提出数字交换网络中T及S接线器的图模型及T接线器的分析方法,它为数字程控交换机话路系统的故障诊断提供了理论基础。