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Chapter 7. WAN Protocols and Technologies: Integrated Services Digital Network (ISDN)Authoring contribution by Daniel Keller Integrated Services Digital Network (ISDN) is basically the digital version of the Public Switched Telephone Network (PSTN). It offers a common platform for integrating voice, video, and data services globally. When discussing ISDN, we actually are talking about Narrowband ISDN (N-ISDN). The other type of ISDN is referred to as Broadband ISDN (B-ISsDN), which provides high-speed transmissions and is the foundation behind ATM, which is addressed in more depth in Chapter 8, "WAN Protocols and Technologies: Asynchronous Transfer Mode (ATM)." |
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