atm_ptg_ae1 - Asynchronous Transfer Mode (ATM) Fundamentals...

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Asynchronous Transfer Mode (ATM) Fundamentals Definition Asynchronous transfer mode (ATM) is a high-performance, cell-oriented switching and multiplexing technology that utilizes fixed-length packets to carry different types of traffic. ATM is a technology that will enable carriers to capitalize on a number of revenue opportunities through multiple ATM classes of services; high-speed local-area network (LAN) interconnection; voice, video, and future multimedia applications in business markets in the short term; and in community and residential markets in the longer term. Overview Changes in the structure of the telecommunications industry and market conditions have brought new opportunities and challenges for network operators and public service providers. Networks that have been primarily focused on providing better voice services are evolving to meet new multimedia communications challenges and competitive pressures. Services based on asynchronous transfer mode (ATM) and synchronous digital hierarchy (SDH)/synchronous optical network (SONET) architectures provide the flexible infrastructure essential for success in this evolving market (see Figure 1). Figure 1. Better Service
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Web ProForum Tutorials http://www.iec.org Copyright © The International Engineering Consortium 2/23 ATM, which was once envisioned as the technology of future public networks, is now a reality, with service providers around the world introducing and rolling out ATM and ATM - based services. The ability to exploit the benefits of ATM technology within the public network successfully will provide strategic competitive advantage to carriers and enterprises alike. In addition to revenue opportunities, ATM reduces infrastructure costs through efficient bandwidth management, operational simplicity, and the consolidation of overlay networks. Carriers can no longer afford to go through the financial burden and time required to deploy a separate network for each new service requirement (e.g., dedicating a network for a single service such as transparent LAN or frame relay). ATM technology will allow core network stability while allowing service interfaces and other equipment to evolve rapidly. Topics 1. Definition of ATM 2. Benefits of ATM 3. ATM Technology 4. ATM Services 5. ATM Standards 6. ATM LAN Emulation 7. Voice over ATM 8. Video over ATM 9. ATM Traffic Management 10. ATM Applications 11. Nortel's ATM Vision Self-Test Correct Answers Glossary 1. Definition of ATM Asynchronous transfer mode (ATM) is a technology that has its history in the development of broadband ISDN in the 1970s and 1980s. Technically, it can be viewed as an evolution of packet switching. Like packet switching for data (e.g., X.25, frame relay, transmission control protocol [TCP]/Internet protocol [IP], ATM integrates the multiplexing and switching functions, is well suited for bursty traffic (in contrast to circuit switching), and allows communications between
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Web ProForum Tutorials http://www.iec.org Copyright ©
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This note was uploaded on 08/08/2011 for the course CS 310 taught by Professor Aartisingh during the Spring '11 term at National Institute of Technology, Calicut.

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atm_ptg_ae1 - Asynchronous Transfer Mode (ATM) Fundamentals...

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