Reference number
ISO/IEC 15992:2003
© ISO 2024
International Standard
ISO/IEC 15992:2003
Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Inter-exchange signalling protocol — Call Priority Interruption and Call Priority Interruption Protection supplementary services
Edition 2
2003-04
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Published (Edition 2, 2003)
This publication was last reviewed and confirmed in 2015. Therefore this version remains current.

ISO/IEC 15992:2003

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Abstract

ISO/IEC 15992:2003 specifies the signalling protocol for the support of the Call Priority Interruption (SS-CPI) and Call Priority Interruption Protection (SS-CPIP) supplementary services at the Q reference point between Private Integrated services Network eXchanges (PINXs) connected together within a Private Integrated Services Network (PISN).

NOTE This edition of ISO/IEC 15992:2003 does not apply to calls using the circuit-mode multiple rate bearer service.

SS-CPI allows a call request for a priority call to proceed successfully in the case that there is no user information channel available. This is accomplished by force releasing an established call of lower priority.

SS-CPIP allows for the protection of calls against interruption from priority calls.

The Q reference point is defined in ISO/IEC 11579-1.

Service specifications are produced in three stages and according to the method specified in ETS 300 387. ISO/IEC 15992:2003 contains the stage 3 specification for the Q reference point and satisfies the requirements identified by the stage 1 and stage 2 specifications in ISO/IEC 15991.

The signalling protocol for SS-CPI(P) operates on top of the signalling protocol for basic circuit switched call control, as specified in ISO/IEC 11572, and uses certain aspects of the generic procedures for the control of supplementary services specified in ISO/IEC 11582.

ISO/IEC 15992:2003 also specifies additional signalling protocol requirements for the support of interactions at the Q reference point between SS-CPI(P) and other supplementary services and ANFs.

General information

  • Status
     : Published
    Publication date
     : 2003-04
    Stage
    : Close of review [90.60]
  • Edition
     : 2
    Number of pages
     : 37
  • Technical Committee :
    ISO/IEC JTC 1/SC 6
    ICS :
    33.040.35 
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Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goal

9
Industry, Innovation and Infrastructure

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