Table of Contents

Foreword
Introduction
1 Scope
  1.1 Block diagram and functional elements
  1.2 System elements outside the scope of this I-ETS
  1.3 Functional elements covered by this I-ETS
2 Normative references
3 Definitions and abbreviations
  3.1 Definitions
  3.2 Abbreviations
  3.3 Conventions
4 Functional
  4.1 Required elements
  4.2 Information streams
  4.3 Modems
  4.4 Multiplexing
  4.5 Control channel
  4.6 Video channels
  4.7 Audio channels
  4.8 Data channels
5 Terminal procedures
  5.1 Phase A - call set-up of voiceband channel
  5.2 Phase B - initial analogue telephony communication
  5.3 Phase C - establishment of digital communication,
                modem training
  5.4 Phase D - initialization
  5.5 Phase E - communication
  5.6 Phase F - end of session
  5.7 Phase G - change of communication mode and call
                clearing
6 Interoperation with other terminals
  6.1 Speech only terminals
  6.2 ETS 300 145 multimedia telephone terminals
      attached to the ISDN
  6.3 Multimedia telephone terminals over mobile radio
7 Optional enhancements
  7.1 Data facilities
  7.2 Encryption
  7.3 Multilink
8 Multipoint considerations
  8.1 Establishment of common mode
  8.2 Multipoint rate matching
  8.3 Multipoint lip synchronization
  8.4 Multipoint encryption
  8.5 Cascaded MCU operation
9 Maintenance
  9.1 Loopbacks for maintenance purposes
Annex A (normative): Protocol stack for control channel
    A.1 General
    A.2 SRP mode
    A.3 LAPM/ITU-T Recommendation V.42 mode
Annex B (normative): HDLC frame structure transparency
        for asynchronous transmission
Annex C (informative): Bit and octet order
Annex D (informative): ITU-T Recommendation V.8bis codepoints
Annex E (informative): Bibliography
History

Abstract

Covers the technical requirements for very low bit-rate multimedia telephone terminals connected to the Public Switched Telephone Network (PSTN).

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	MTA
Supersedes	PRI-ETS 300 837 : MAR 97