Nortel Networks 8672ATME Manual de usuario descargar pdf (Pagina 33)

Using the Passport 8672ATME Module

Chapter 2

Passport 8672ATME Module terminology

This chapter contains the following information:

• “ATM terms and acronyms,” next

• “SONET terms and acronyms” on page 35

• “SONET transmission rates” on page 36

ATM terms and acronyms

Asynchronous transfer mode (ATM) is a connection-oriented, cell-based

technology that relays traffic across a network. ATM provides a cost-effective way

of transmitting voice, video, and data across a network at high speeds. It offers

topology-independent, resilient networking technology.

An ATM cell is a fixed-length packet of 53 bytes. It consists of a 5-byte header

containing address information and a fixed 48-byte information field. The

fixed-length cell size allows you to predict network delays.

The following terms and acronyms are frequently used with ATM information:

• ATM: Asynchronous transfer mode. ATM is a switched, connection-oriented,

fixed-length, cell-based transmission method specifically designed to run at

high data rates and to carry a complete range of user traffic, including voice,

data, and video. ATM uses dedicated media connections running in parallel,

allowing simultaneous multiple connections through a single switch device at

very high speeds.

• PVC: Permanent virtual circuit. Dedicated connection between devices that is

manually set up.

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 161 162

Sin comentarios

Nortel Networks 8672ATME Manual de usuario Pagina 33