scope:

The present document defines the Terrestrial Trunked Radio system (TETRA) supporting Voice plus Data (V+D). It specifies: - general design aspects (e.g. reference points, numbering and addressing, or protocol architecture); - the system bearer and mobility management services, and the corresponding air interface protocols; - the interworking between TETRA networks; - the interworking of TETRA networks with other networks, via gateways; - the peripheral equipment interface on the mobile station; - the security protocols and mechanisms applicable to TETRA networks and to TETRA terminal equipment; - the supplementary services applicable to the basic TETRA tele- or bearer services.