This ETS gives the stage 2 description of the call identification supplementary services. The group line identification supplementary services are divided into the following four supplementary services:
Life cycle
NOW
PUBLISHED SSH ETS 300 542:1997 ed.2 60.60
Standard published 9 korr 2025
Related project
Adopted from
ETS 300 542 (GSM 03.81 version 4.6.1): March 1997