Internet VOIP phones help to make phone calls on the internet. These phones give ease to use the network cabling in the premises of the office to carry on the phone talks to PBX. They facilitate great features like contacts book, caller identification, call divert etc. These phones use the various communication standards and protocols to send the calls through the internet network. The Voice over internet protocol combines the present way of talking i.e. the audio signals, and converts them to digital data which can be transferred over the Internet protocol (IP) based networks.