ISO/IEC 17875:2000 PDF

Overview

ISO/IEC 17875:2000 defines the Private User Mobility Registration (SS‑PUMR) supplementary service for Private Integrated Services Networks (PISN). The standard covers stage 1 (feature principles and capabilities) and stage 2 (functional model and information flows) of PUM registration, enabling a PUM user to register or de‑register at any wired or wireless terminal within a PISN so that services (making/receiving calls) follow the user to different access points. It is intended for PISN environments and references basic services in ISO/IEC 11574.

Key topics and technical requirements

• Service scope and behaviour
  • Definition of PUM registration, de‑registration, registration session, AllCall / InCall / OutCall options.
  • Ability for registration requests to be accepted or rejected by the network.
• Functional model (stage 2)
  • Identification of Functional Entities (FEs) involved in PUMR and their relationships to basic call FEs (CC, CCA).
  • Allocation of FEs to physical equipment and mapping to PISN architecture (PINX, HDB, VDB).
• Information flows
  • Detailed information flow definitions and sequences between FEs supporting registration, location updates and hosting address resolution.
  • Use of Specification and Description Language (SDL) to describe behaviour and message sequences.
• Databases and addressing
  • Home Data Base (HDB) and Visitor Data Base (VDB) concepts, Home PINX and Visitor PINX, and the notion of a hosting address where a user is currently registered.
• Interaction and interworking
  • Interaction with other supplementary services and additional network features (e.g., CLIP, CFU, WTLR, WTAT) and considerations for interworking with related PISN services.
• Conformance
  • Stage 3 (protocols and signalling) is required to claim full conformance; ISO/IEC 17875 provides requirements that stage 3 specifications must support.

Applications and users

• Target users:
  • PBX / PISN vendors, telecom equipment manufacturers and firmware developers.
  • Enterprise network architects and system integrators implementing mobility across wired and wireless endpoints.
  • Standards engineers, test labs and interoperability teams creating stage‑3 signalling protocols and conformance test suites.
• Practical uses:
  • Enabling corporate users to retain a single PISN identity (PUM number) while moving between desks, rooms or wireless coverage areas.
  • Supporting unified call handling, consistent incoming/outgoing call behavior, and location‑aware service delivery in private networks.

Related standards

• ISO/IEC 11574 (basic call services), ISO/IEC 11571 (addressing), ISO/IEC 11579‑1 (PINX), ISO/IEC 15428 / 15430 / 15432 (wireless terminal features), ISO/IEC 17877 (PUM call handling), and ITU‑T Rec. I.130 / I.112 / I.210 / Z.100.

Keywords: ISO/IEC 17875, PUMR, Private User Mobility, PISN, PUM registration, Home Data Base, Visitor Data Base, PINX, supplementary service.