ISO IEC 13865:2003 pdf download – Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Specification, functional model and information flows — Call Transfer supplementary service.
1 Scope This International Standard specifies Supplementary Service Call Transfer (SS-CT), which is applicable to various basic services supported by Private Integrated Services Networks (PISNs). Basic services are specified in ISO/IEC 11574. SS-CT is a supplementary service which enables a user to transform two of that user’s calls (of which one must be answered) into a new call between the other two users of the two calls. Supplementary service specifications are produced in three stages, according to the method described in ETS 300 387. This International Standard contains the stage 1 and stage 2 specifications of SS-CT. The stage 1 specification (clause 6) specifies the supplementary service as seen by users of PISNs. The stage 2 specification (clauses 7 and 8) identifies the functional entities involved in the supplementary service and the information flows between them. This International Standard contains two stage 2 specifications reflecting different ways of operating the service within the network: transfer by join and transfer by rerouteing. 2 Conformance In order to conform to this International Standard, a stage 3 standard shall specify signalling protocols and equipment behaviour that are capable of being used in a PISN which supports the supplementary services specified in this International Standard. This means that, to claim conformance a stage 3 standard is required to be adequate for the support of those aspects of clause 6 (stage 1) and clauses 7 and 8 (stage 2) which are relevant to the interface or equipment to which the stage 3 standard applies. 3 Normative references ISO/IEC 11574:2000, Information technology – Telecommunications and information exchange between systems – Private Integrated Services Network – Circuit-mode 64 kbit/s bearer services – Service description, functional capabilities and information flows ISO/IEC 11579-1:1994, Information technology – Telecommunications and information exchange between systems – Private integrated services network – Part 1: Reference configuration for PISN Exchanges (PINX) ISO/IEC 13864:1995, Information technology – Telecommunications and information exchange between systems – Private Integrated Services Network – Specification, functional model and information flows – Name identification supplementary services ISO/IEC 14136:1995, Information technology – Telecommunications and information exchange between systems – Private Integrated Services Network – Specification, functional model and information flows – Identification supplementary services ETS 300 387:1994, Private Telecommunication Network (PTN); Method for the specification of basic and supplementary services ITU-T Rec. I.112:1993, Vocabulary of terms for ISDNs ITU-T Rec. I.210:1993, Principles of telecommunication services supported by an ISDN and the means to describe them ITU-T Rec. Z.100:1999, Specification and description language (SDL)

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