ETS 300 221 : 20001

Foreword
1 Scope
2 Normative references
3 Definitions and abbreviations
4 Overview
5 Configurations
6 General model
7 Service definition
  7.1 Introduction
  7.2 Kernel services
8 Protocol
9 Coding
10 Use of CCITT Recommendation X.3 parameters
11 Bearer Independent Service (BIS) for syntax-based
   Videotex over PSTN
12 Lower layers
  12.1 Layer 3 protocols
  12.2 Layer 2
  12.3 Layer 1 protocol
13 Asynchronous interface
Annex A (informative): Examples of configurations
  A.1 Symbols
  A.2 Connection to a Videotex Host (VH)
  A.3 Access to a Videotex Service (VS) via a Videotex
      Access Point (VAP)
  A.4 Host to terminal call establishment
  A.5 Terminal to terminal communication
Annex B (informative): Usage of supplementary services
Annex C (normative): Terminal function basic state
Annex D (informative): The SBV_Escape service
Annex E (informative): Extended data forwarding signals
Annex F (normative): BIS constraints on ISO 8208 PICS
Annex G (normative): perating sequences for CCITT
                     Recommendation V.29 short turn
                     around
  G.1 Turn-ON sequence at 9 600/7 200 bits per second
  G.2 Turn-ON sequence at 4 800/2 400 bits per second
  G.3 Turn-OFF sequence
  G.4 Circuit 109
  G.5 Circuit 106
History

Meets the requirements of network operators and equipment manufacturers who are designing equipment to operate with an increased speed on Videotex services over the Public Switched Telephone Network (PSTN). Applies to terminals that support syntax-based Videotex lower layer protocols using packet mode access over the PSTN to be attached to a modem.