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B-ISDN (Broadband Integrated Services Digital Network)
Ender Ayanoglu, University of California, Irvine
Nail Akar, Bilkent University, Ankara, Turkey
ABSTRACT: The subject of B-ISDN came into being in the late 1980s, together with the concept of
Asynchronous Transfer Mode (ATM). ATM is closely tied to high-speed packet switching by
means of specialized switches implemented in hardware. Due to its high speed and packet
structure, ATM technology was considered attractive to unify voice, data, and video services. A
unification of these services over the telephone infrastructure was attempted earlier by a standards
offering known as Integrated Services Digital Network (ISDN). Consequently, this new service
unification was termed Broadband ISDN (B-ISDN). Although due to its origins, B-ISDN is
sometimes closely tied to ATM technology, the term independently represents the vision of
packet-based high-speed integration of voice, data, and video services. It is important that in this
process, guarantees to satisfy different Quality-of-Service (QoS) needs (in terms of delay, loss,
etc) required by voice, data, and video services are provided. In this vision, what is important is
the unification, or integration of services; and the underlying technology is of secondary
importance. As of the early 2000s, the technology to be employed in realizing this vision seems
to have shifted from its origins of ATM. In this article, our emphasis is on B-ISDN as a service
integration vision. Nevertheless, we will describe its original emphasis as the service offering of
ATM as well as the path the industry seems to be taking in implementing this vision.
SUGGESTED CITATION: Ender Ayanoglu and Nail Akar,
"B-ISDN (Broadband Integrated Services Digital Network)"
(May 25, 2002).
Center for Pervasive Communications and Computing.
Paper 2.
http://repositories.cdlib.org/cpcc/2
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