Voice-over-Internet Protocol (VoIP) provides the technical means to converge information-technology data center operations with traditional telecommunications support functions.

The real potential for VoIP appears to be in the enterprise, where rich functionality, changing requirements, and the opportunity to slash the cost of local and international calls are the biggest drivers for an immediate return on investment.

To see the details behind this calculator and fill in your own estimates, click on the "Get the Tool" icon above and download the interactive worksheet.