BS 6513-5:1987

Foreword
Committees responsible
Recommendations
Section one. General
1.1 Scope
1.2 Definitions and abbreviations
1.3 General recommendations, including safety
Section two. Interfaces
2.1 Interconnection with external networks
2.2 Subscriber data interfaces
Section three. Performance guidelines
3.1 Error rates
3.2 Service levels
Section four. Operation of specialist services
4.1 General
4.2 Videotex services
4.3 Teletex services
Section five. Data subscriber addressing
5.1 Interim recommendations
Appendices
A. Bibliography
B. Interchange circuits between data terminal
     equipment (DTE) and data circuit-terminating
     equipment (DCE) for asynchronous DTEs
C. Interchange circuits between data terminal
     equipment (DTE) and data circuit-terminating
     equipment (DCE) for synchronous DTEs
D. Definitions of interchange circuits
E. Recommended alpha-numeric keyboard and TTL
     interface
Tables
1. Characteristics of preferred asynchronous inter-
     faces for start-stop terminals
2. Cable/equipment interfaces required for videotex
3. Prestel display attribute control codes
4. Recommended character set and Prestel coding
Figures
1. General model of data circuits of wideband cabled
     distribution system
2. Major interfaces for a videotex service
3. Identification of possible delivery methods
4. Prestel transmission codes
5. Conversion from Prestel to teletext
6. Security and privacy considerations: options
7. PSDN access line extension to teletex terminals
8. Head end PABX links to teletex terminals
9. The ISO reference model for OSI: functional layers
10. Teletex terminal identification
11. Head end cable mail server supporting user
     terminals
12. Head end cable mail server supporting WCDS
     terminals
13. Teletex document containing cable mail call control
     information
14. CDE/DTE interface address on PSS
15. Packet structure
16. Protocol identity and format

Includes recommendations for connection to external networks, subscriber interfaces and addressing, and protocols for videotex (including the use of level 1 teletext as a method of delivery) and teletex services. Also provides some guidance on performance targets.