电信交换系统和网络（TSSN）教程

This tutorial will help you understand the different aspects of telecommunication switching systems. It is designed to deliver knowledge about the basic concepts of telephony.

读者

A beginner who is interested in the fundamentals of telephony can go ahead with this tutorial, with even little knowledge in communications.

Prerequisites

It is highly recommended that a reader of this tutorial has prior knowledge about what is telecommunication and how it works.