Are VoIP calls really free?
When you use a VoIP network to call another telephone on the same VoIP network, calls are “free”. However, when calling the PSTN (Public Switched Telephone Network), there are per minute charges based on the destination of the call. In the balance, most businesses which make a lot of office-to-office calls (incurring toll charges) and long-distance calls will save from 40-80% in their monthly phone bill using VoIP. The number of U.S. VoIP customers is likely to rise from 750,000 to about 9 million by 2008, researcher In-Stat/MDR says, so the cost of VoIP calls to the PSTN should get lower.
