BRI combines two 64 Kbps channels and one 16 Kbps channel on a two wire telephone line. The 64 Kbps channels can be used for voice or data or you can combine them to create a 128 Kbps dial-up data channel. Analog signals need amplifiers if they are to travel more than several thousand feet. These amplifiers boost the signal, but unfortunately any noise picked up along the way as well. ISDN transmission is digital.
Digital technology provides higher transmission quality than analog.
Repeaters recreate the original signal to keep the transmission error-free over long distances. This process eliminates distortion because it doesn't amplify noise in the transmission. This means that Informatics' ISDN transmits voice more clearly and data more cleanly than analog lines. It's like the difference between hearing your favorite song on a compact disc instead of a standard cassette tape. In order to connect with Informatics' ISDN service, you will need to purchase ISDN interface equipment.