Here are some great reasons to use VoIP!

Its utility is numerous. It has a number of functionalities. In-fact these functionalities can be easily en-numerated as follows:

1. The Voice Telephone Calls can be transmitted to the same broadband telephone line.
2. This system has options like 3-way calling, automatic redialing and call forwarding.
3. Digitising and Digital transmission under standardized protocols.
4. It has location independence as only one internet connection is required to avail this connection.
5. It integrates with other internet based services like messaging, video conversation or data file exchange.

Source: VoIP: A means to organizational productivity - TMC Net - March 06, 2008