Voice over Internet Protocol or VoIP is about a decade old technology that is gaining popularity among individual subscribers and businesses. In conventional systems, phone calls are made using telephones or handsets that are connected by phone cables. These calls are routed using the Public Switched Telephone Network (PSTN) carrying a signal from one telephone to the other. But instead of connecting telephones to the phone cables through phone jacks in the walls, VoIP uses the internet where phones can be connected to broadband devices, adapters or PCs using broadband. With this system, voice is converted into a digital signal and carried over the Internet. Let’s take a look at all the options that are available to make calls using VoIP.