Broadband Integrated Services Digital Network (B-ISDN); Digital Subscriber Signalling System No. Two (DSS2) Protocol; Supplementary Service Interactions; Part 1: Protocol Specification
This first part of ETS 300 669 specifies the stage three of the supplementary service interactions 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 [4]) 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]). This ETS specifies the interactions between the Calling Line Identification Presentation (CLIP)@ Calling Line Identification Restriction (CLIR)@ Connected Line Identification Presentation (COLP)@ Connected Line Identification Restriction (COLR)@ Direct Dialling In (DDI)@ Multiple Subscriber Number (MSN)@ Subaddressing (SUB) and User-to-User Signalling (UUS) supplementary services. 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 protocol for individual supplementary services is specified in other ETSs: DDI: ETS 300 661-1 [5]; MSN: ETS 300 662-1 [6]; CLIP: ETS 300 663-1 [7]; CLIR: ETS 300 664-1 [8]; COLP: ETS 300 665-1 [9]; COLR: ETS 300 666-1 [10]; SUB: ETS 300 667-1 [11]; UUS: ETS 300 668-1 [12]. When two or more supplementary services are implemented@ the protocol interactions are defined in this ETS. These interactions are applicable to the telecommunication services as specified for the individual supplementary 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 supplementary services@ 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.