ETSI - PRETS 300 223
Integrated Services Digital Network (ISDN); Syntax-Based Videotex Common End-to-End Protocols
|Publication Date:||1 January 1992|
This ETS specifies both the end-to-end Application layer protocol for the Syntax-based Videotex Service (VS) and the underlying Bearer Independent Service (BIS).
NOTE 1: This ETS does not specify any service aspects of a Syntax-based Videotex Service.
This ETS is applicable to all devices supporting the Bearer Independent Service on the upper side of the Network Layer (NL) [cf. Clause 11]. In the context of this ETS, a device is either a Videotex Terminal (VT), a Videotex Service Centre (VSC), a Videotex Access Point (VAP) or a Videotex Host (VH) [cf. subclause 3.1].
NOTE 2: Depending on the lower layer communication type in use (in particular ISDN DTE/DTE, ISDN DTE/DCE or PSTN), a separate standard is assumed to be applicable for the respective lower layer protocols.
TEMPORARY NOTE: Currently, ETS 300 079 is an exception to NOTE 2.