ÖNORM EN 300392-3-4 V 1.2.1

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 Line Station (LS) interface with TETRA networks; 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. The TETRA V+D interworking basic operation part defines the interworking between TETRA networks over the corresponding interface: the Inter System Interface (ISI). It comprises the following subparts: ISI general design; Additional Network Feature ISI Individual Call (ANF ISIIC); Additional Network Feature ISI Group Call (ANF ISIGC); Additional Network Feature ISI Short Data service (ANF ISISD); Additional Network Feature ISI Mobility Management (ANF ISIMM); 8 kbit/s encoding of user information at the ISI. The present document specifies the Additional Network Function (ANF) Inter System Interface (ISI) Short Data service (ANF ISISD) which is part of the Interworking Basic Operation of the Terrestrial Trunked Radio system (TETRA) supporting Voice and Data (V+D). Specifically the present document details the stage 1, 2 and 3 aspects of the ANF ISISD as seen from the TETRA Switching and Maintenance Infrastructure (SwMI) point of view at the Inter System Interface (ISI). This service comprises of: TETRA user defined short message transmission over the ISI to individual and group addresses; TETRA pre defined short message transmission over th (...abbreviated)