Table of Contents

Foreword
1 Scope
   1.1 Normative references
   1.2 Abbreviations
2 Concepts and terminology
3 Overview description of LAPDm functions and
   procedures
   3.1 General
   3.2 Unacknowledged operation
   3.3 Acknowledged operation
   3.4 Information transfer mode
   3.5 Release of data links
4 Service characteristics
   4.1 General
   4.2 Services provided to layer 3
   4.3 Services required from the physical layer
   4.4 Administrative services
5 Overview of data link layer structure
   5.1 Functional composition
   5.2 Identification of data link end points
   5.3 Data link procedure
   5.4 Data link distribution procedure
   5.5 Random access procedures
6 Specific requirements
   6.1 Mode of operation and allowed SAPIs
   6.2 Acknowledged mode of operation
History

Abstract

Defines in general terms the Link Access Procedures on the Dm channel, LAPDm. The application of this protocol to other channel types is for further study. Details are provided in GSM 04.06. The purpose of LAPDm is to convey information between layer 3 entities across the GSM PLMN radio interface (MS to network interface) using the Dm channel.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	SMG 3
Supersedes	PRETS 300 937 : 5.0.0