scope:

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 (clause 1); CLIR - Calling line identification restriction (clause 2); COLP - Connected line identification presentation (clause 3); COLR - Connected line identification restriction (clause 4).