Since immemorial communication has been an integral part of our life and will continue to be so. With  an increase in globalisation and constant boost in world economy, communication has become a high priority area. As a result the selection of an appropriate channel of communication is one of the most critical decisions to be taken by an organisation looking at a long and successful run. Up until now public switch telephony network was the in monopoly. However with changing times, Internet has provided us with an extremely beneficial alternative to it, namely  VoIP .