Short for Integrated Services Digital Network. Digital telecommunications lines transmitting voice, digital network services. Standard improves compatibility for integrated digital transmission of voice, video, data over normal copper telephone wires, allowing better quality, speeds. Two primary types: BRI (Basic Rate Interface), PRI (Primary Rate Interface), PRI is faster, on par with T-1 circuits. Many telephone companies provide ISDN because of being able to deliver reliable speed (up to 128K) over analog modems.canonglossaryus
A telephone connection used mostly by businesses because it allows data files to be transmitted at about twice the speed of normal telephone lines. It costs about 50 to convert a line and costs about 40 per month rental.