Question 18/I - Videotex service
(revised, previously Question 19/I, 1985-1988)

Considering

(a) the progress achieved by the CCITT in studying Videotex service
which is an interactive service and provides, through appropriate
access by standardized procedures, for users of Videotex terminals to
communicate with terminals and databases via telecommunication
networks;

(b) that a number of administrations are operating Videotex services;

(c) that there is an expected future requirement for international
interconnection of Videotex services and for interworking with other
Telematic services;

(d) that the CCIR is studying data broadcasting systems and
services particularly those for alphanumeric and/or graphic displays on
television receivers, suitably supplemented;

(e) that further studies are required on Recommendations F.300 and
T.101/T.100;

(f) that there is a need to study the simultaneous use of different
presentation modes to take into account new audiovisual and
interactive applications;

(g) that the emergence of ISDN offers the possibility of economic and
enhanced features in Videotex services,

What new Recommendations are required and what additions of
modifications to Recommendation F.300 or other existing
Recommendations are needed for the development of Videotex
services internationally?

Particular points for study are:

1. the intercommunication with telex, Teletex, message handling and
other Telematic services.

Intercommunication with these services has just started in some
Videotex services. The service parameters, charging principles and
service configurations need to be studied.

2. definition and harmonization of service profiles and reference
models;

3. rules for interworking between different Videotex service profiles.
Different service profiles are in operation. The rules for interworking
-
conversion, transcoding, defaults - need to be studied.

4. review of Quality of Service parameters;

5. study of the Videotex service in the ISDN. Although it is not
intended
to define a completely new Videotex service for the ISDN, some of the
existing service parameters need adjustment;

6. consideration of the human factor aspects and security in the
Videotex service;

7. extension of Recommendation F.300 to support non-Latin based
languages;

8. enhancements: Videotex-telesoftware, photographic mode,
animation, audio, synchronization between modes, etc..