ISO IEC 21407 pdf download

ISO IEC 21407 pdf download Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Specification, functional model and information flows — Simple dialog supplementary service
1 Scope
This International Standard specifies the supplementary service Simple Dialog (SS-SD), which is applicable to various basic services supported by Private Integrated Services Networks (PISNs). Basic services are specified in ISO/IEC 11574.
Supplementary service SD enables a user to communicate with another user or application by the exchange of keypad and display information transparently over a PISN.
Service specifications are produced in three stages, according to the method described in ETS 300 387. This International Standard contains the stage 1 and stage 2 specifications of SS-SD. The stage 1 specification (clause 6) specifies the supplementary service as seen by users of PISNs. The stage 2 specification (clause 7) specifies the functional entities involved in the supplementary service and the information flows between them.
2 Conformance
In order to conform to this International Standard, a stage 3 standard shall specify signalling protocols and equipment behaviour that are capable of being used in a PISN which supports the supplementary service specified in this International Standard. This means that, to claim conformance, a stage 3 standard is required to be adequate for the support of those aspects of clause 6 (stage 1) and clause 7 (stage 2) which are relevant to the interface or equipment to which the stage 3 standard applies.
3 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any ofthese publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions ofthe normative documents indicated below. For undated references, the latest edition ofthe normative document referred to applies. Members ofISO and IEC maintain registers ofcurrently valid International Standards.
ISO/IEC 11574:2000, Information technology – Telecommunications and information exchange between systems – Private Integrated Services Network – Circuit-mode 64 kbit/s bearer services – Service description, functional capabilities and information flows
ISO/IEC 11579-1:1994, Information technology – Telecommunications and information exchange between systems – Private integrated services network – Part 1: Reference configuration for PISNExchanges (PINX)
ETS 300 387:1994, Private Telecommunication Network (PTN); Method for the specification of basic and supplementary services
ITU-T Rec. I.112:1993, Vocabulary ofterms for ISDNs
ITU-T Rec. I.210:1993, Principles oftelecommunication services supported by an ISDNand the means to describe them
ITU-T Rec. Z.100:1999, Specification and description language (SDL)
4 Definitions
For the purposes ofthis International Standard, the following definitions apply:
4.1 External definitions
This International Standard uses the following terms defined in other documents:
— Basic Service (ITU-T Rec. I.210)
— Private Integrated Services Network Exchange (PINX) (ISO/IEC 11579-1)