Table of Contents

Foreword
1 Scope
  1.1 Objectives
2 References
3 Definitions and abbreviations
  3.1 Definitions
  3.2 Abbreviations
4 Overview
  4.1 Scenario overview
  4.2 Status overview
  4.3 Conclusion from overview
5 Criteria for scenario selection
  5.1 Service criteria
  5.2 Availability of base standards
  5.3 Availability of terminals
  5.4 Conclusions
6 Scenarios for which the base standards are available
  6.1 Access for an ISDN videophony terminal to an audio-visual
      database using DTMF
  6.2 Access for a PSTN videophony terminal to a PSTN service
      centre using DTMF
  6.3 Access to an enhanced Videotex service using a combined
      Videotex and ISDN videophony terminal
7 General framework for retrieval and audio-visual services
  7.1 Framework description
  7.2 Framework structuring
  7.3 Innovation of the framework
8 Conclusions
9 Recommendations
Annex A: (informative) ITU-T Recommendation T.120 series for
         audiographic teleconferencing overview
History

Abstract

Examines interworking and interoperability between retrieval services (videotex, possibly including moving video) and audio-visual services (videotelephony and videoconferencing) on narrow-band networks (Integrated Services Digital Network (ISDN)) and (Public Switched Telephone Network (PSTN)).

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	TE 1