Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. Two (DSS2) Protocol; Calling Line Identification Presentation (CLIP) Supplementary Service; Part 1: Protocol Specification (ITU-T RECMN Q.2951.3 (1995)@ Modif
This first part of ETS 300 663 specifies the stage three of the Calling Line Identification Presentation (CLIP) supplementary service for the pan-European Broadband Integrated Services Digital Network (B-ISDN) as provided by European public telecommunications operators at the TB reference point or coincident SB and TB reference point (as defined in ITU-T Recommendation I.413 [1]) by means of the Digital Subscriber Signalling System No. two (DSS2) protocol. Stage three identifies the protocol and procedures and switching functions needed to support a telecommunication service (see ITU-T Recommendation I.130 [2]). In addition@ this ETS specifies the protocol requirements at the TB reference point where the service is provided to the user via a private B-ISDN. This ETS does not specify the additional protocol requirements where the service is provided to the user via a telecommunications network that is not a B-ISDN. The CLIP supplementary service provides the called party with the possibility of receiving identification of the calling party. The CLIP supplementary service is applicable to all telecommunication services. Further parts of this ETS specify the method of testing required to identify conformance to this ETS. This ETS is applicable to equipment@ supporting the CLIP supplementary service@ to be attached at either side of a TB reference point or coincident SB and TB reference point when used as an access to the public B-ISDN.