CONTENTS

Introduction
�1���� Scope
�2���� References
����� 2.1 Normative references
����� 2.2 Informative references
�3���� Definitions
�4���� Abbreviations
�5���� The protocol framework of IP over SDH using LAPS
�6���� Physical layer and its primitives
�7���� Service facilities and protocol specifications of Data link
7.1� UITS and its specification
Annex A�� The LAPS specification
������� A.1���� General
������� A.2���� Frame structure for peer-to-peer communication
������� A.3���� Elements of procedures and formats of fields for data link layer
������� A.4���� Definition of the peer-to-peer procedures of the data link layer
Annex B�� Primitives between layer 3 or other upper protocols and data link, layer 1 and data link
������� B.1���� General
������� B.2���� Layer 3 - data link layer primitives
������� B.3���� Layer 1 - data link layer primitives
������� B.4���� The connection management entity - Data link layer primitive
������� B.5���� Parameter definition
������� B.6���� Primitive relationship description
Annex C� The self-synchronous scrambling/descrambling (x⁴³ + 1) function description
Appendix I� The main differences� between LAPS and PPP/HDLC