- ISDN
- ISDN ISDN noun [uncountable]COMPUTING Integrated Services Digital Network; a system that allows computer information to be sent at extremely high speeds along an electronic wire similar to a telephone line:
• These companies have made big capital investments in ISDN.
• an ISDN telephone line
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Integrated Services Digital Network. A high-technology telecommunications network that allows data to be transferred over phone lines as digital signals, allowing much higher transfer rates.* * *
ISDN UK US noun [C or U]► IT, COMMUNICATIONS ABBREVIATION for Integrated Services Digital Network: a system for sending sound, video and other data at high speed using telephone wires: »Teleconferencing via ISDN is cheaper than flying executives around the world for monthly meetings.
»If you need three ISDNs, you should consider investing in a satellite linkup.
Financial and business terms. 2012.