Voice over Internet Protocol (Voice over IP or VoIP) allows users to make phone calls over the Internet, or any other IP network, using the packet switched network as a transmission medium rather than the traditional circuit transmissions of the Public Switched Telephone Network (PSTN). As the technology has become more reliable in recent years, companies have been moving to VoIP for a number of reasons.

Consolidation of voice and data on one network reduces costs and results in a lower network total cost of ownership (TCO). Operating expense savings include lower long distance charges, reduced support costs and savings via workforce virtualization.

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