You must, of course, have access to a high-speed Internet connection and if your Internet connection is down you lose your phone service until you get back on line. There are still some reliability and security issues but it’s likely that these will soon be addressed as consumer and business demand for broadband phone service increases. Broadband - Advanced telecommunications capability is any infrastructure capable of delivering data at a speed of 200 kbps per second in both direction. Broadband phone and the up and coming IP TV are just a couple examples of the newest technologies dial up users are missing out on.