VoIP will continue to be the sweetspot of next-generation networks. It will double every year over the next four years from $14.3 million in 2003 to $288 million by 2007. The study also shows the government, education and healthcare sectors would see the highest implementation of self-implemented IP telephony, he said. About 13.9% of companies interviewed in this space were currently using the technology. Globally, there are a host of voice-over-broadband (VoBB) technologies including offerings from SIPphone, Vonage, deltathree, Yahoo BB Phone, Skype and DOCSIS 1.1 or 2.0.