VoIP or Voice over Internet Protocol is the technology used to transmit voice or audio files over the Internet. Using what is known as the Packet Switching Network, audio is transmitted over the Internet and then received by a computer, VoIP phone, or standard telephone. This is in contrast to Circuit Switching networks- the network used for the Public Switched Telephone Network (the standard telephone system) that people have used for nearly 100 years.

VoIP has many advantages compared to PSTN; primarily the number one advantage is that VoIP is considerably less expensive than other networks. Many Instant Messaging programs are now incorporating the technology of VoIP and are providing free calls anywhere in the world. The only requirement is that the other user has a computer, high speed Internet, speakers, a microphone, and the same Instant Messaging program. These Instant Messaging programs have many advantages. The first advantage is that they are absolutely free.

Many people are taking advantage of this opportunity to speak with friends and loved ones worldwide, without time limits, absolutely free of charge. Instant Messaging programs such as AOL Instant Messaging, ICQ, MSN, Yahoo Messenger, and now even Google has released their new Beta version Instant Messaging with VoIP.

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