CONTENTS

 1     Introduction
 2     Basic principles of ATM
 3     ATM layer
        3.1     ATM connections
                  3.1.1     Connection definition
                  3.1.2     Connection identifiers
                  3.1.3     Aspects of Virtual Channel Connections (VCCs)
                  3.1.4     Aspects of Virtual Path Connections (VPCs)
                  3.1.5     Pre-assigned cell header values
        3.2     Service characteristics
                  3.2.1     Services expected from the physical layer
                  3.2.2     Services provided to the higher layer
        3.3     Management plane interactions
        3.4     Functions of the ATM layer
                  3.4.1     Cell multiplexing and switching
                  3.4.2     Quality Of Service provided by the ATM layer
                  3.4.3     Payload type functions
                  3.4.4     Generic Flow Control (GFC) at the UNI
Annex A – Alphabetical list of abbreviations contained in this Recommendation