现如今通信已经很普及。为了跟上时代的潮流，满足人们的日常生活需求，对通信设备和通信技术提出了更 高的要求，通信工程必须不断地更新换代。下一代通信网络的关键是软交换技术，本文通过分析软交换技术的概念、原理、特 点、协议，介绍其在通信工程中的应用，并对其发展进行一些探究。

Nowadays communication has become very popular. In order to keep up with the times trend, and meet with people's needs in daily life, there are higher requirements to the communications equipment and communication technology. Communication engineering must be updated continuously. The key of next generation communication network is soft switch technology. This paper analyzes the concept, principle, characteristics and protocol of soft switch technology, introduces its application in communication engineering, and researches on its development.