本文在简要介绍某大型数字程控交换机系统的基础上叙述了其通信处理模块的研制与开发工作。
This paper describes the development and realization of CPM on the basis of introducing a large capacity digital SPC exchange system.
例如，我在2006年得以参加Asterisk，一种开源程控交换机(仿佛电话系统里的Linux)的培训课程。
For example, I was offered an optional training course in Asterisk, an open source PBX (like Linux for phone systems) in 2006.
介绍一种新型的程控交换机用户线测试系统。
A new kind of subscriber line testing system for SPC exchanges is introduced.
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