Voice over IP subscribers in America will number 27 million by the end of 2009, market researcher IDC predicts, up from 3 million by the end of this year.
Already Japan has more that over 8 million subscribers. Another research firm, iSuppli, expects the worldwide number of residential VOIP subscribers will reach $197 million by 2010.
The numbers do not include people using VoIP without subscribing to a service (for example, by downloading free software from Google, Skype or others). Skype alone has 54 million users. VoIP is threatening the pricing models of the telecoms industry because it is making telephone calls virtually free.
