This ETS defines the Terrestrial Trunked Radio system (TETRA) Direct Mode of operation. It specifies the basic Air Interface (AI), the interworking between Direct Mode Groups via Repeaters, and interworking with the TETRA trunked system via Gateways. It also specifies the security aspects in TETRA Direct Mode, and the intrinsic services that are supported in addition to the basic bearer and teleservices. This part describes the security mechanisms in TETRA Direct Mode. It provides mechanisms for confidentiality of control signalling and user speech and data at the AI.
Life cycle
NOW
PUBLISHED SSH ETS 300 396-6:1998 ed.1 60.60
Standard published Oct 7, 2024
Shqip