The present document specifies the stage 2 description of the Supplementary Services CLIP, CLIR and COLP all part of
Call Identification for the Terrestrial Trunked Radio (TETRA). The term "Line" is used in the present document by
extension to the air interface and to keep those supplementary service names at the Air Interface in TETRA Radio based
network.
Calling Line Identification Presentation (SS-CLIP) is a supplementary service which is offered to the connected user
and which provides either the calling users identity (ITSI for TETRA) in case of individual call or the calling user
identity (GTSI is presented as part of the normal group call set-up) in case of group call.
COnnected Line Identification Presentation (SS-COLP) is a supplementary service which is offered to the calling user
and which provides the connected users identity (connected ITSI for individual call, connected GTSI for a group call).
Calling/Connected Line Identification Restriction (SS-CLIR) is a supplementary service offered to a user to restrict
presentation of that users ITSI to another user. The generic term SS-CLIR covers in fact two different supplementary
services: SS-CLIR (Calling Line Identity Restriction) and SS-COLR (COnnected Line identity Restriction). Contrary to
ECMA-148 [9] and in line with public ISDN, the two services have been split in the present document to improve its
readability.
Man-Machine Interface and charging principles are outside the present document.
Supplementary service specifications are produced in three stage according to the method defined in
ITU-T Recommendation I.130 [1]. The stage 2 description identifies the functional capabilities and the information
flows needed to support the supplementary service as specified in its stage 1 description (see EN 300 392-10-1 [7]). The
stage 2 description is followed by the stage 3 description (see EN 300 392-12-1 [8], which specifies the protocols a (...abbreviated)