ISO/IEC 13872:2003 PDF

Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Specification, functional model and information flows — Call Diversion supplementary services

First page of standard ISO/IEC 13872:2003

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Title (English):

ISO/IEC 13872:2003

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 72
Publication date:: March 21, 2003
Edition:: ISO/IEC IS 13872 edition 2 version 1
ICS:: 33.040.35

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Description (English):

ISO/IEC 13872:2003 specifies the supplementary services Call Forwarding Unconditional (CFU), Call Forwarding Busy (CFB), Call Forwarding No Reply (CFNR) and Call Deflection (CD), which are applicable to various basic services supported by Private Integrated Services Networks (PISN). Basic services are specified in ISO/IEC 11574. SS-CFU, SS-CFB and SS-CFNR are supplementary services which apply during call establishment providing a diversion of an incoming call to another destination. SS-CD is a supplementary service which allows a served user to respond to an incoming call by requesting redirection of that call to another number specified in the response. Supplementary service specifications are produced in three stages, according to the method described in ETS 300 387. ISO/IEC 13872:2003 contains the stage 1 and stage 2 specifications of the Call Diversion supplementary services. The stage 1 specifications (Clauses 6, 7, 8 and 9) specify the supplementary services as seen by users of PISNs. The stage 2 specification (Clause 10) identifies the functional entities involved in the supplementary services and the information flows between them.

Technical details

Technical committee: ISO/IEC JTC 1/SC 6 - Telecommunications and information exchange between systems
SKU: ISO/IEC 13872:2003

Abstract

Overview

ISO/IEC 13872:2003 defines the Call Diversion supplementary services for Private Integrated Services Networks (PISN). It specifies four services: Call Forwarding Unconditional (SS‑CFU), Call Forwarding Busy (SS‑CFB), Call Forwarding No Reply (SS‑CFNR) and Call Deflection (SS‑CD). The standard contains stage 1 (user-facing service descriptions) and stage 2 (functional model and information flows) specifications, describing how diversions are invoked, the functional entities involved, and the signalling/information sequences needed to support these services in a PISN environment.

Key Topics and Requirements

Services covered
- SS‑CFU: unconditional forwarding of incoming calls.
- SS‑CFB: forwarding when the destination is busy.
- SS‑CFNR: forwarding when there is no reply.
- SS‑CD: user‑initiated deflection or redirection of an incoming call.
Stage 1 (user view): behavior, provisioning/withdrawal procedures, normal and exceptional call‑handling cases, and interactions with other supplementary services (e.g., CLIP, COLP, CLIR, call transfer, completion of calls).
Stage 2 (functional model): identification and description of functional entities (FEs), allocation of functions to equipment, detailed information flows and example flow sequences. Stage 2 also provides functional entity actions and behaviour for diversion processing.
Conformance: To claim conformance, a stage 3 standard (protocol level) must implement the aspects of stage 1 and stage 2 relevant to its interfaces/equipment.
Interworking and deployment: includes interworking considerations for PISN exchanges and interactions with basic services defined in ISO/IEC 11574.

Practical Applications and Users

Telecommunications equipment vendors designing PBX/PISN exchanges and features like call forwarding and deflection.
Protocol engineers and system integrators developing stage‑3 signalling protocols that must interoperate with PISN call diversion services.
Network architects and service providers implementing enterprise telephony solutions who require standardized behavior for call diversion across nodes.
Test labs and conformance bodies validating that equipment follows the stage 1/2 functional and information‑flow requirements.

Benefits

Ensures consistent user experience for call forwarding and deflection features across vendors.
Provides a clear functional model for implementing diversion logic and tracing information flows.
Facilitates interoperability between PISN components and simplifies stage‑3 signalling design.

Related Standards

ISO/IEC 11574 (basic call services and capabilities)
ISO/IEC 11571 (addressing)
ISO/IEC 11579‑1 (PISN exchange reference configuration)
ETS 300 387 (method for specification of services)
ITU‑T recommendations referenced for terminology and SDL (e.g., I.112, I.210, Z.100)

Keywords: ISO/IEC 13872:2003, Call Forwarding, Call Deflection, SS‑CFU, SS‑CFB, SS‑CFNR, SS‑CD, PISN, stage 1, stage 2, functional model, information flows.

Related standards

Standards mentioned in the description

Abstract

Overview

Key Topics and Requirements

Services covered
- SS‑CFU: unconditional forwarding of incoming calls.
- SS‑CFB: forwarding when the destination is busy.
- SS‑CFNR: forwarding when there is no reply.
- SS‑CD: user‑initiated deflection or redirection of an incoming call.
Stage 1 (user view): behavior, provisioning/withdrawal procedures, normal and exceptional call‑handling cases, and interactions with other supplementary services (e.g., CLIP, COLP, CLIR, call transfer, completion of calls).
Stage 2 (functional model): identification and description of functional entities (FEs), allocation of functions to equipment, detailed information flows and example flow sequences. Stage 2 also provides functional entity actions and behaviour for diversion processing.
Conformance: To claim conformance, a stage 3 standard (protocol level) must implement the aspects of stage 1 and stage 2 relevant to its interfaces/equipment.
Interworking and deployment: includes interworking considerations for PISN exchanges and interactions with basic services defined in ISO/IEC 11574.

Practical Applications and Users

Telecommunications equipment vendors designing PBX/PISN exchanges and features like call forwarding and deflection.
Protocol engineers and system integrators developing stage‑3 signalling protocols that must interoperate with PISN call diversion services.
Network architects and service providers implementing enterprise telephony solutions who require standardized behavior for call diversion across nodes.
Test labs and conformance bodies validating that equipment follows the stage 1/2 functional and information‑flow requirements.

Benefits

Ensures consistent user experience for call forwarding and deflection features across vendors.
Provides a clear functional model for implementing diversion logic and tracing information flows.
Facilitates interoperability between PISN components and simplifies stage‑3 signalling design.

Related Standards

ISO/IEC 11574 (basic call services and capabilities)
ISO/IEC 11571 (addressing)
ISO/IEC 11579‑1 (PISN exchange reference configuration)
ETS 300 387 (method for specification of services)
ITU‑T recommendations referenced for terminology and SDL (e.g., I.112, I.210, Z.100)

Keywords: ISO/IEC 13872:2003, Call Forwarding, Call Deflection, SS‑CFU, SS‑CFB, SS‑CFNR, SS‑CD, PISN, stage 1, stage 2, functional model, information flows.

ISO/IEC 13872:2003 PDF

Technical details

Abstract

Overview

Key Topics and Requirements

Practical Applications and Users

Benefits

Related Standards

Related standards

Abstract

Overview

Key Topics and Requirements

Practical Applications and Users

Benefits

Related Standards

Related standards

Private Integrated Services Network (PISN); Specification, functional models and information flows; Control a…

Private Integrated Services Network (PISN); Addressing [ISO/IEC 11571 (1998), modified]

Information technology — Telecommunications and information exchange between systems — Private integrated ser…