ZDNet India : Tech giants abuzz over VoIP for cell phones:
"Sun Microsystems and other tech giants are calling Internet phone technology the cell phone industry's next big thing, saying it will help solve old problems and create new servi"

VoIP is a technology for making phone calls via IP, the world's most popular method for sending data from one computer to another. After years of overpromising and underdelivering, VoIP is generating significant interest among telecom carriers, corporations and consumers, thanks to significant improvements in quality of service.

Carriers are already embracing VoIP as a way to cut traffic costs on international and long-distance calls, and it is expected to eventually replace the public switched telephone network, as big phone companies convert to IP-based fiber-optic networks. Currently, about 10 percent of all international voice traffic is classified as VoIP, although less than 1 percent of those calls are initiated on a VoIP phone.