ATM General Introduction

The Asynchronous Transfer Mode (ATM) was born out of standardisation efforts for Broadband ISDN which began in the CCITT in the mid 1980s. It was originally intimately bound up with the emerging Synchronous Digital Hierarchy (SDH) standards, and was conceived as a way in which arbitrary-bandwidth communication channels could be provided within a multiplexing hierarchy consisting of a defined set of fixed-bandwidth channels.

The basic principles of ATM as put forward by CCITT in Recommendation I.150 are:

Daniel Davids - 9 January 1997 (