After this information do not trash slip in the ATM

     

After this information do not trash slip in the ATM

Asynchronou transfer mode (ATM) is a high bandwidth, low-delay, connection-oriented switching and multiplexing technique. ATM technology is based on the switching of small fixed-length packets of data called cells. In ATM, all data is transferred in 53-byte cells. Each cell has a 5-byte header that identifies the cell’s route through the network and 48 bytes that contain user data (called the payload). The adaptation layer is the outer layer of the ATM network. This layer includes enterprise switches and service access multiplexers. These devices support the service interfaces and adapt legacy protocols, such as frame relay, to ATM. The Passport 6400 switch is an ATM access device and can exist either on the customer premises or in the service provider’s central office ATMon Nortel Multi service Switch networks is based on standards developed by the ATM Forum and the International Telecommunication Union (ITU). Because ATM uses small cells to transfer data and chronically timing, Multi service Switch devices can support a wide range of audio, video, image, and data communications requirements.  ATM uses a type of time division multiplexing that transmits different applications (voice, data, or video) over the same connection. With ATM technology, Multi service Switch nodes can allocate bandwidth on demand based on each application’s bandwidth and quality of service (QOS) requirements.

Unlike shared-medium local area network (LAN) techno logiest where users contend for bandwidth (Ethernet and token ring), Multi service Switch nodes provide dedicated, deterministic, high-speed connectivity. The Multi service Switch service management strategies optimize network performance and increase service provider revenues. Its flexible accounting features include usage-based billing, time-of-day billing, and carrier-class accounting. Multi service Switch nodes monitor and collect statistics for each service category then spools them for off-line analysis.

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