ISO IEC 21407-2001 PDF

Full title and description

Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Specification, functional model and information flows — Simple dialog supplementary service (ISO/IEC 21407:2001). This International Standard defines the Simple Dialog (SS‑SD) supplementary service for Private Integrated Services Networks (PISNs), specifying user-visible behaviour (stage 1) and the functional entities and information flows (stage 2) required to support transparent exchange of keypad and display information between users and applications over a PISN.

Abstract

ISO/IEC 21407:2001 specifies the Simple Dialog supplementary service (SS‑SD) for PISNs. The standard includes stage 1 (service description as seen by users) and stage 2 (functional model and information flows) specifications. SS‑SD enables a user to communicate with another user or with an application by exchanging keypad and display information transparently over a PISN and is intended to be used alongside the basic PISN services defined in ISO/IEC 11574.

General information

• Status: Published / Confirmed international standard.
• Publication date: August 2001 (2001-08).
• Publisher: ISO and IEC (JTC 1/SC 6 — Telecommunications and information exchange between systems).
• ICS / categories: 33.040.35 (Telephone networks / PISN-related services).
• Edition / version: Edition 1 (2001).
• Number of pages: 16 pages.

Key bibliographic and lifecycle details above are recorded on the ISO bibliographic entry and national/European adoption records.

Scope

This standard applies to Private Integrated Services Networks (PISNs) and specifies the Simple Dialog supplementary service (SS‑SD). It covers the user-visible service semantics (stage 1) and the stage 2 functional model and information flows between the functional entities that support the service. The scope explicitly targets the transparent exchange of keypad and display information between users and/or applications and assumes use in conjunction with PISN basic services (see ISO/IEC 11574). The specification has also been referenced and adapted in related European documents (EN/ETSI profiles) for PISN supplementary services.

Key topics and requirements

• Definition and user-visible behaviour of the Simple Dialog supplementary service (SS‑SD) — stage 1 service specification.
• Functional model and information flows between PISN entities required to support SS‑SD — stage 2 specification.
• Interoperability assumptions with PISN basic services (referencing ISO/IEC 11574 for underlying call/connection services).
• Requirements for transparent keypad and display data exchange between users and applications over PISN infrastructure.
• Basis for regional/adopted profiles such as ETSI/EN adaptations (e.g., ETSI EN 301920 mapping/modifications of the ISO text).

Typical use and users

Implementers of PISN equipment and services (telecom vendors and system integrators), standards developers and technical committees working on telecommunication signalling and supplementary services, test laboratories creating conformance tests, and corporate network administrators deploying PISN features. The standard is used to ensure consistent behaviour of the Simple Dialog service across equipment and regional implementations.

Related standards

Standards and specifications closely related to ISO/IEC 21407:2001 include ISO/IEC 11574 (PISN basic services), ISO/IEC 21408 (Inter‑exchange signalling protocol — Simple Dialog, 2003), ISO/IEC 21409 and ISO/IEC 21410 (related signalling/interworking support for supplementary services in corporate networks), and regional/adopted documents such as ETSI EN 301920 (PISN — Simple Dialog supplementary service) which implements or adapts the ISO text for European use.

Keywords

Private Integrated Services Network (PISN); Simple Dialog (SS‑SD); supplementary service; stage 1; stage 2; functional model; information flows; keypad/display exchange; ISO/IEC 21407:2001; telecommunications standards.

FAQ

Q: What is this standard?

A: ISO/IEC 21407:2001 is an international standard that defines the Simple Dialog supplementary service (SS‑SD) for Private Integrated Services Networks (PISNs), including both stage 1 (service definition) and stage 2 (functional model and information flows) specifications.

Q: What does it cover?

A: It covers the user-visible behaviour of the Simple Dialog service and the required functional entities and information flows to support transparent exchange of keypad and display information between users and applications over a PISN. The standard is intended to be used alongside PISN basic services.

Q: Who typically uses it?

A: Telecommunication equipment vendors, system integrators, network operators running PISNs, standards developers, and test laboratories use the standard to design, implement, and verify support for the SS‑SD supplementary service.

Q: Is it current or superseded?

A: ISO/IEC 21407:2001 is recorded as the 2001 edition and appears on ISO’s record as a published/confirmed international standard. No ISO replacement was indicated on the ISO bibliographic entry consulted; regional/adopted versions (for example ETSI EN 301920) have referenced or adapted the ISO text. Users requiring the absolute latest status should verify with the national/ISO catalogue or the relevant standards body for any amendments or newer revisions.

Q: Is it part of a series?

A: Yes — ISO/IEC 21407 is one of several related PISN and supplementary‑service standards (for example ISO/IEC 21408, 21409, 21410 and the PISN basic services standard ISO/IEC 11574) that together describe signalling, interworking and supplementary services for private and corporate telephony networks.

Q: What are the key keywords?

A: Key keywords include Simple Dialog, SS‑SD, PISN, supplementary service, stage 1, stage 2, functional model, information flows, keypad/display exchange, ISO/IEC 21407.