CONTENTS

 1     Introduction
 2     Reference Model Definitions
        2.1     Identical Recommendations | International Standards
        2.2     Additional references
 3     Definitions
        3.1     Reference Model definitions
        3.2     X.25 Definition
        3.3     Additional definitions
 4     Abbreviations
        4.1     Systems
        4.2     Protocol data units
        4.3     Miscellaneous
 5     Address Translation Service Model
 6     Overview of the protocol
        6.1     The ARE function
        6.2     Overview of Alternative Address Information
        6.3     Overview of redirection information
 7     The ARE address
 8     DTE Alternative Address Information subset
        8.1     Protocol parameters
        8.2     Protocol operation
        8.3     Normal Completion procedure
        8.4     Use of Alternative Address Information
 9     DTE redirection information subset
        9.1     Invoking Redirection
        9.2     Receiving Redirection Information
        9.3     Use of Redirection Information
10     Address Masks
       10.1     Address Mask
11     ARE procedures
       11.1     Processing of Alternative Address Information subset
       11.2     Processing of Redirection subset
12     Structure and encoding of PDUs
       12.1     Parameters
       12.2     PDU Structure
Annex  A  –  Mapping X.116 messages to X.25 packets