Asterisk : The Voip
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Introduction
Asterisk is an opensource PBX (Private Branch Exchange) under dual license. As it is opensource you can add new applications on it by modifying the code. A number of telephones can be attached to asterisk, both soft phones and hard phones. The software for soft phones can be downloaded from the websites and for attaching the hard phones you may need a card in your system. Also chat and file transfer interfaces are coming with some of the soft phones. Ans many built in features are there with asterisk. IVR(interactive voice response), conference calling, automatic call distribution are a few examples of the features. Also you can configure your asterisk server for voicemail options.
Three main protocols can be used in asterisk : IAX2, SIP and H323. I have cofigured my server to run between both IAX2 and SIP.
Installation can be done in two ways, either from the compiled files or from the source code. In the first method already compiled file will be available and you need only to install it from those files. And in the second method, first you have to get the source code and then compile it. After compilation you have to install it.
