Definition of integrated services digital network in English:

integrated services digital network

(also ISDN)


  • A telecommunications network through which sound, images, and data can be transmitted as digitized signals.

    • ‘The emerging telcos have been slow to compete with Eircom in providing broadband services for small businesses such as ISDN (integrated services digital network).’
    • ‘ISDN (integrated services digital network) is becoming essential for small business phone, internet and fax use.’
    • ‘It is believed DSL, using copper wire and about 10 times faster than integrated services digital network, will remain the main communications line until replaced by optical fiber.’
    transmit, convey, communicate
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