Table of Contents

Foreword
0 Introduction
  0.1 Scope
  0.2 Normative references
  0.3 Definitions and abbreviations
1 General
2 Frame structure for peer-to-peer communication
  2.1 General
  2.2 Frame delimitation and fill bits
  2.3 Address field
  2.4 Control field
  2.5 Length indicator field
  2.6 Information field
  2.7 Transparency
  2.8 Format convention
3 Elements of procedures and formats of fields for
  Data Link Layer peer-to-peer communication
  3.1 General
  3.2 Address field format
  3.3 Address field variables
  3.4 Control field formats
  3.5 Control field parameters and associated state
      variables
  3.6 Length indicator field format
  3.7 Length indicator field variables
  3.8 Commands and responses
4 Elements for layer-to-layer communication
  4.1 Definition of primitives and parameters
  4.2 Primitive procedures
5 Definition of the peer-to-peer protocol LAPDm
  5.1 General
  5.2 General Protocol Procedures
  5.3 Procedures for unacknowledged information
      transfer
  5.4 Procedures for establishment and release of
      multiple frame operation
  5.5 Procedures for information transfer in multiple
      frame operation
  5.6 Abnormal release and re-establishment of multiple
      frame operation
  5.7 Exception condition reporting and recovery for
      multiple frame operation
  5.8 List of system parameters
  5.9 System performance requirements
6 Special protocol operation on SAPI=0 and SAPI=3
Annex A (normative): Random access procedures
  A.1 Description of the procedure
  A.2 Format
Annex G (normative): Handling of frames with parameter
        errors in the address, control and length
        indicator fields
  G.1 General
  G.2 Parameter errors in the address field
  G.3 Parameter errors in the control field
  G.4 Parameter errors in the length indicator field
History

Abstract

Specifies the frame structure, elements of procedure, format of fields and procedures for the proper operation of the Link Access Procedure on the Dm channel, LAPDm.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	SMG 3
Supersedes	PRETS 300 555 : MAY 94