1、INTERNATIONAL STANDARD ISO/IEC 14136 First edition 1995-06-01 Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Specification, functional model and information flows - Identification supplementary services Technologies de /in
2、formation - T and - when the calling user number is not available, e.g. due to interworking with the analogue telephone network (PSTN). In such cases the called user shall receive an indication of the situation. In either case the called user can receive the calling user subaddress, if available. 6.
3、3 Interaction with other supplementary services and ANFs Interactions with other supplementary services and ANFs for which PISN International Standards were available at the time of publication of this International Standard are specified below. 6.3.1 Connected Line Identification Presentation (SS-C
4、OLP) No interaction. 6.3.2 Calling/Connected Line Identification Restriction (SS-CLIR) The calling user number shall not be presented if calling line identification restriction has been invoked at the calling user, unless the called user has the service profile to override this restriction. 6.4 Inte
5、rworking considerations 6.4.1 Incoming calls On calls incoming from another network, the calling user number, and calling user subaddress, if available, are obtained from the other network. In some circumstances the number may be marked “user provided, not screened”. Where no number is provided by t
6、he other network, the called user shall be given an indication “number unavailable due to interworking” or “presentation restricted”, as appropriate. 6.4.2 Outgoing calls This PISN supplementary service does not apply to outgoing calls. NOTE I - The possible provision of the calling user number and/
7、or calling user subaddress to another network is part of the basic call, see ISO/IEC 11574. 6.5 Overall SDL Figure 1 contains the dynamic description of SS-CLIP using the Specification and Description Language (SDL) defined in CCITT Rec. 2.100 (1988). The SDL process represents the behaviour of the PISN in providing SS-CLIP. The relationship of this process to the basic call process is indicated in the annotations. Output signals to the right represent primitives to the called user. Input signals from the left represent internal stimuli.
