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IT Interview Questions: What is ISDN Integrated Services Digital Network (ISDN)

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IT Interview Questions: What is ISDN Integrated Services Digital Network (ISDN)

Integrated Services Digital Network (ISDN) is a set of ITU-T (Telecommunication Standardization Sector of the International Telecommunications Union) standards for digital transmission over ordinary telephone copper wire as well as over other media. ISDN provides the integration of both analog or voice data together with digital data over the same network. ISDN has two levels of service:

Basic Rate Interface (BRI)

Primary Rate Interface (PRI) The BRI interfaces for ISDN on a non-modular router are BRI0, BRI1, and so on, with the number following ?BRI? signifying the port number. In a modular router, BRI is followed by the slot number/port number.

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