---

• CCITT Rec. T.564 (11/1988) – GATEWAY CHARACTERISTICS FOR VIDEOTEX INTERWORKING
• 1 Introduction
• 2 Scope and field of application
  • 2.1 National videotex services
  • 2.2 Videotex interworking definition
  • 2.3 Relation to other Recommendations
• 3 References
• 4 Definitions
• 5 Abbreviations
• 6 Model of the communication between local and external host
  • 6.1 International videotex interworking between gateways
  • 6.2 Position of videotex interworking relative to OSI
  • 6.3 Organization of the videotex interworking
• 7 Relation between videotex and DTAM service (see Figure 4/T.564)
• 8 Use of lower layer services
• 9 General structure of the VIA
  • 9.1 General data structure
  • 9.2 Attributes
  • 9.3 General VIA operation
• 10 Videotex structure
  • 10.1 Display structure
  • 10.2 Data entry structure
  • 10.3 Administrative structure
  • 10.4 Special terminal facilities structure
• ANNEX A (to Recommendation T.564)
• ANNEX B (to Recommendation T.564)