- noun a high-speed data transfer service that allows data and voice to be transmitted over a wide area network.
- acronymB ISDN
- Abbreviation of broadband Integrated Services digital Network. An advanced version on ISDN based on ATM technology. It uses fiber-optic cables, and is capable of transmission speeds exceeding 1 Gbps. Its own abbreviation is BISDN. Also spelled broad-band ISDN. Also known as wideband ISDN.
- synonymbroadband Integrated Services Digital Network