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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
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STANDARD published on 24.3.2003
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Designation standards: ISO/IEC 15992-ed.2.0
Publication date standards: 24.3.2003
SKU: NS-941574
The number of pages: 37
Approximate weight : 111 g (0.24 lbs)
Country: International technical standard
Category: Technical standards ISO
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.
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