CAN/CSA-ISO/IEC 15052-01

Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Inter-Exchange Signalling Protocol - Recall Supplementary Service (Adopted ISO/IEC 15052:1997, first edition, 1997-05-15)

Publication Year 2001
Published by CSA Group
Withdrawn

Available Formats:

PDF

SKU: 2414327

A digital copy of the document, accessed through CSA OnDemand.

Pages: 17

Language:

English

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Preface/Scope

1 Scope

This International Standard specifies the signalling protocol for the support of Recall supplementary service (SS-RE) at the Q
reference point between Private Integrated Services Network Exchanges (PINXs) connected together within Private Integrated
Services Network (PISN).

SS-RE is a supplementary service which provides for the re- direction of a transferred call back to the served user if the call is unanswered. SS-RE is only applicable after transfer by join, not after transfer by rerouteing.

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 CCITT Recommendation I.130. This International Standard 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 15051.

The signalling protocol for SS-RE 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.

This International Standard also specifies additional signalling protocol requirements for the support of interactions at the Q
reference point between SS-RE and other supplementary services and ANFs. However, the interaction with the Call Transfer
supplementary service is specified as part of SS-RE signalling procedures as it is the essential aspect of the Recall
supplementary service.

Note - Additional interactions that have no impact on the signalling protocol at the Q reference point can be found in the relevant stage 1 specifications.

This International Standard is applicable to PINXs which can be interconnected to form a PISN.