What is VoIP?
VoIP (Voice over Internet Protocol) is simply the transmission of voice traffic over IP-based networks.
The Internet Protocol (IP) was originally designed for data networking. The success of IP in becoming a world standard for data networking has led to its adaption to voice networking.

What devices are used to talk through VoIP?
1. VoIP telephones
2. Conventional telephones with a VoIP adapter
3. Computer with speakers and a microphone