Introduction: What Are We Trying to Accomplish?

In this chapter we look into how the Asterisk PBX (Private Branch Exchange) plays an important role in our day-to-day lives of communication. We review some key functionality of Asterisk PBX systems and how they are being used to benefit our communication. We review some older PBX function technologies, such as analog and digital, as well as the new integrated VoIP-enabled functions. We review the benefits that IP-enabled PBX may have and its key differences from traditional voice technology.

In addition to providing an overview of the Asterisk PBX and examining the critical role of the PBX in our daily communications, we review the key functions of PBX systems and the multiple ways the PBX contributes to modern information exchange. The goal of this chapter is to offer solid instruction on the Asterisk PBX and underscore its significance.

Understanding the function and process of the PBX is essential to securing it successfully. After reading this chapter, you should be able to understand the Asterisk PBX system and its place of functionality in today s communication environment.

What Functions Does a Typical PBX Perform?

One of the main functions and benefits of a PBX is to reduce the number of local loops required from the PSTN central office switch. Further PBX core functions include maintain the routing information for the customer s telephone lines and to route calls accordingly. As its name delineates, PBX is used primarily as a private device owned by a solitary...