ÖNORM EN 300392-3-2 V 1.2.1

The present document defines the Terrestrial Trunked Radio (TETRA) system 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 is the ANF-ISIIC sub-part. ANF-ISIIC enables calls to be set-up by a user registered in one TETRA network to another user registered in another TETRA network, operating at the ISI of both SwMIs. It also supports call restoration when a user has migrated to another TETRA network during an established call. Additionally, ANF-ISIIC allows TETRA signalling information to be passed from a TETRA SwMI to another TETRA SwMI supporting the TETRA individual call procedures as defined in clauses 11 and 14 of EN 300 392-2 [1]. Like all other Additional Network Feature (ANF) specifications, those of ANF-ISIIC are produced in three st (...abbreviated)