Browsing by Author "Zaheer Ahmed, Muhammad Mustafa Aziz, Faheem Iqbal Bhatti and Areeba Tasawar"

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    End to End VoIP Communication using Asterisk (An Open Source PBX)
    (UMT, Lahore, 2007) Zaheer Ahmed, Muhammad Mustafa Aziz, Faheem Iqbal Bhatti and Areeba Tasawar
    This report aims to describe the complete process that was followed while developing an End-to-End Telephone Service using VoIP through Asterisk (An open source PBX). Our project aims to create an Internet telephony system that allows subscribers to make long distance calls at rates equivalent to local rates. The subscribers are able to use traditional hard phones instead of soft phones(or computers) for communicating via our service. The system is similar to that of'net2phone' and other Internet telephony service providers except that we are providing a hard phone interface to our users. This allows users with access to all the facilities available through Internet telephony without needing either a computer or an Internet connection. Hence our solution is not only cost effective but also very user friendly. We used Asterisk to act as the exchange for our main servers. Asterisk is an open source Private Branch Exchange (PBX) implemented in Linux. It has the facility to connect to the Local Telephone exchange or PSTN and other Asterisk exchanges. We have implemented a menu-based service on our main servers that allows our subscribers to authenticate and dial the number they desire to connect with. Our server connects to another Asterisk server at the remote location through the Internet. The remote server is also connected to its local exchange. This will allow the user of one PSTN e.g. Lahore to connect to another remote PSTN e.g. Karachi through our servers. The voice traffic generated after the establishment of a connection is transmitted using Voice over IP (VoIP).