The UK is getting a complete telecommunications makeover, vaulting it ahead of every country on the planet. BT began the Herculean task of replacing its existing telephone network with one based entirely on the Internet Protocol. When the #10 billion network project is completed, there will be no technical difference in the UK between the telephone system and the Internet, though they will be distinct networks for security, quality-of-service, and billing reasons. The BT initiative, 21st Century Network (21CN), will give the country a phone system that will be at once the simplest and most modern imaginable