Roughly three-quarters of large companies in the U.S. have already made the switch to IP telephony. These companies have realized lower bandwidth costs, reduced personnel requirements, tax savings and cheaper moves, adds, and changes (MAC).

Still not convinced?

This calculator will help you figure out your company's initial costs and projected annual savings to determine your overall return on investment if you migrated to voice over IP.

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