Broadband Integrated Services Digital Network
In the 1970s
industry conceived that digital services would follow much the same pattern as voice services, and conceived a grandiose vision of end-to-end circuit switched
services, known as the Broadband Integrated Services Digital Network
(B-ISDN). This was conceived as a logical extension of the end-to-end circuit switched data service, ISDN
The technology for B-ISDN was going to be Asynchronous Transfer Mode (ATM), which was intended to carry both synchronous voice and asynchronous data services on the same transport.
The B-ISDN vision has been overtaken by the disruptive technology of the Internet.
The ATM technology survives as a low-level layer in most DSL technologies.