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Broadband Integrated Services Digital Network (B-ISDN)

Broadband Integrated Services Digital Network (B-ISDN). Carey Williamson. University of Calgary. Introduction. B-ISDN is an all-purpose digital network that will support a wide variety of applications and services in a flexible and cost-effective manner

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Broadband Integrated Services Digital Network (B-ISDN)

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  1. Broadband Integrated Services Digital Network (B-ISDN) Carey Williamson University of Calgary

  2. Introduction • B-ISDN is an all-purpose digital network that will support a wide variety of applications and services in a flexible and cost-effective manner • Successor to Narrowband ISDN (called N-ISDN or ISDN) • B-ISDN assumes transmission rates of 155 Mbps and up

  3. B-ISDN Capabilities • Interactive and distributive services • Broadband and narrowband rates • Bursty and continuous traffic • Connection-oriented and connectionless • Point-to-point or multipoint connections • Delay-sensitive or delay-insensitive traffic

  4. B-ISDN Assumptions • High capacity and high performance fiber-based transmission at physical layer • Flexible switching and multiplexing (i.e., “transfer modes”) • Transfer mode determines the rules for dividing up the usable capacity (bandwidth) of the network and allocating it to users (channels) • Choice: Asynchronous Transfer Mode (ATM) • Need to accommodate a wide variety of services, with diverse traffic mixes

  5. Simplified Protocol Stack Broadband ISDN B-ISDN Asynchronous Transfer Mode ATM Synchronous Optical NETwork SONET

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