Introduction to VoIP

TrixBox is essentially an easy-to-use system for managing our telephony needs. Before we can understand how to operate the TrixBox telephone system, we need to cover the basic principles that underlie the system. In this Topic, we will talk about the telephone network and the PBX (Private Branch Exchange) that traditional telephone systems run on. Fundamentally, TrixBox is a VoIP (Voice over Internet Protocol) system. So, we will have a look at what VoIP means and why it is useful to us. We will also take a look at any prerequisite knowledge or skills required, with advice on where to get these if necessary. We will define any new terms we come across; however, some of the commonly used terms used in or relating to this topic are listed in Appendix A at the end of the topic for ease of reference while reading the later topics.