This European Telecommunication Standard (ETS) defines the TErrestrial Trunked RAdio (TETRA) Direct Mode Operation (DMO). It specifies the basic Air Interface (AI)@ the inter-working between Direct Mode (DM) groups via repeaters@ and inter-working with the TETRA Voice plus Data (V+D) system via gateways. It also specifies the security aspects in TETRA DMO@ and the intrinsic services that are supported in addition to the basic bearer and teleservices. This part applies to the TETRA DMO Mobile Station - Mobile Station (MS-MS) AI and contains the specifications of the Data Link Layer (DLL) and the network layer according to the ISO model. It establishes the services@ messages and protocols used for voice and circuit mode data calls and short data transfer@ starting with the upper layers: - it defines and specifies the protocol used by the layer 3 entity to communicate across the AI; - it defines and specifies the services and protocol used in the DLL. The normative annexes mainly specify the parameter values used in the protocol.
PRETS 300 396-3-1997由ETSI - European Telecommunications Standards Institute 发布于 1997-12-01,并于 2014-04-08 实施。
* 在 PRETS 300 396-3-1997 发布之后有更新,请注意新发布标准的变化。
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