"This specification describes the supplementary services belonging to the group LINE IDENTIFICATION SUPPLEMENTARY SERVICES. The general aspects@ including definitions and recommended provision@ of the description of the GSM supplementary services are given in specification GSM 02.04. The group of LINE IDENTIFICATION SUPPLEMENTARY SERVICES is divided into the following four supplementary services: CLIP - Calling line identification presentation (section 1); CLIR - Calling line identification restriction (section 2); COLP - Connected line identification presentation (section 3); COLR - Connected line identification restriction (section 4). Definition of line identity: The line identity is made up of a number of information units: - the subscriber's national ISDN/MSISDN number (MSISDN number is the number stored in the VLR); - the country code; - optionally@ subaddress information. The GSM PLMN cannot be responsible for the content of this subaddress. (For definition of the subaddress see CCITT Recommendation E.164 [3] subsection 11.2). In a full ISDN environment@ the line identity shall include all the address information necessary to unambiguously identify a subscriber. The calling line identity is the line identity of the calling party. The connected line identity is the line identity of the connected party. Definition of Presentation and Screening Indicators: In addition to or instead of the line identity the network may give a Presentation Indicator (PI) and/or a Screening Indicator (SI) to the served subscriber. The following information may be given: - Presentation Indicator showing: a) presentation allowed@ or b) presentation restricted@ or c) number not available due to interworking; - Screening Indicator showing: a) user provided@ verified and passed@ or b) user provided@ not screened@ or c) network provided. If the line identity is that of a GSM PLMN subscriber then: the national number and the country code shall always be provided by the network; the subaddress shall only be included if it is provided by the user (or user equipment); the screening indicator shall indicate ""network provided""."