Table of Contents

Intellectual Property Rights
Foreword
1 Scope
2 Normative references
3 Definitions, symbols and abbreviations
  3.1 Definitions
  3.2 Symbols
  3.3 Abbreviations
4 General
  4.1 Application of the present document
  4.2 Definition of the modes of transmission on the
      Multiple Channel (MC) side
  4.3 General description of the aggregation process
  4.4 CAU functionality
5 Choice of ISO Aggregation or H.244 Aggregation
  procedure
6 H.244 Aggregation procedure
  6.1 Call control
  6.2 Channel synchronization
  6.3 In-band procedure using ITU-T Recommendation
      H.221 BAS codes
  6.4 Transmission of user information by a CAU
7 Initialization, mode/rate changing and fault
  recovery
  7.1 Initialization
  7.2 Change of transmission rate during a session
  7.3 Recovery from fault conditions
  7.4 Further mode changeslizations
8 ISO Aggregation procedure
Annex A (informative): Examples
Annex B (informative): Example of SDL diagram for
        H.244 Aggregation initialization
      B.1 H.244 Aggregation operation selected
Annex C (informative): Comments on the modification
        of capsets and commands
Annex D (informative): Bibliography
History

Abstract

The purpose of the amendment to this ETS is to correct the errors in the published document following the PE 82 and subsequent V99. Where the existing scope shall not be altered from "This ETS defines protocols for the operation of a Channel Aggregation Unit effecting synchronisation and aggregation of multiple ISDN channels at 64 kbit/s, these channels being with a differential delay in the range of +/-1 second and with or without octet integrity structure. It also addresses the case of interworking with a digital network restricted to a rate of 56 kbit/s. etc"

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	MTA
Supersedes	PREN 300 481 : 1.2.1