How to build an IP PBX with Asterisk Card?

How to build an IP PBX with Asterisk Card?



This article demonstrates how to build your own ip pbx in about an hour . Provided that the instructions herein are followed carefully, you too should be able to set up your very own ip pbx system and all for the cost of the target hardware of your choice.
1) . What is a PBX ?
A PBX (Private Branch Exchange) is a switch station for telephone systems. It consists mainly of several branches of telephone systems and it switches connections to and from them, thereby linking phone lines.
Companies use a PBX for connecting all the internal phones to an external line. This way, they can lease only one line and have many people using it together, with each one having a phone at the desk with different number. Inside a PBX, you only need to dial three-digit numbers to make a call to another phone in the network. We often refer to this number as an extension.
Most people are familiar with PBXs because they've used them in an office environment, but what if you wanted to use one in small office or your house? Enter Asterisk , which is free and offers all this functionality right out of the box.
Asterisk is a software implementation of a hardware PBX and can run on a variety of hardware platforms. The features and benefits of owning an Asterisk PBX are numerous, and seemingly only limited by the imagination of the person who sets up and uses an Asterisk PBX.
2). Build your Asterisk ip pbx
There are many ways of setting up an Asterisk ip PBX , with some being easier than others. The easiest amanner in which to set up a fully functional Asterisk ip PBX is to download and install aprecompiled/tuned distribution such as Trixbox, Asterisk NOW, etc. Just take your pick of those. These are great if you don't care to learn about how your PBX operates or need to do a mindless "click and drool" install. The problem with precompiled asterisk distributions is, while they are simple, they are not as flexible and extensible as a home-brewed Asterisk installation from the source code. When you install one of these "distros", it is quite often that important decisions are already made for you, and you must work within the framework of the distribution to keep the box "happy". When you roll your own Asterisk from the sources, you get more say in what goes into the build and how it is customized/extended at the expense of a slightly more complicated planning and installation process. However, it's not as hard as you might think and it's quite worth it in the end to "roll your own".
In this article I will cover the steps needed to install Asterisk for the Ubuntu Linux operating system. This article assumes you know how to do a minimal command line only base system install of Ubuntu Linux. You certainly don't want to run a GUI on your Asterisk box as it would consume unnecessary resources.