This ETS specifies the supplementary service Call Retention which is applicable to various basic services supported by TETRA SwMIs. Basic services are specified in ETS 300 392-2 [4]. SS-CRT is a supplementary service which applies either during call establishment or once call is established to protect a call from pre-emption by another call of lower priority.
PUBLISHED
SSH ETS 300 392-12-24:2000 ed.1
60.60
Standard published
11 sht 2025