scope:

This ETS defines the interface between the Subscriber Identity Module (SIM) and the Mobile Equipment (ME) for use during the network operation phase of TETRA as well as those aspects of the internal organization of the SIM which are related to the network operation phase. This is to ensure interoperability between a SIM and an ME independently of the respective manufacturers and operators. The concept of a split of the MS into these elements as well as the distinction between the TETRA network operation phase, which is also called TETRA operations, and the administrative management phase is described in the User Requirement Specification ETR 295 [9].

This ETS defines:

- the requirements for the physical characteristics of the SIM, the electrical signals and the transmission protocols;

- the model which shall be used as a basis for the design of the logical structure of the SIM;

- the security features;

- the interface functions;

- the commands;

- the contents of the files required for the TETRA application;

- the application protocol.

This ETS does not specify any aspects related to the administrative management phase. Any internal technical realization of either the SIM or the ME are only specified where these reflect over the interface. This ETS does not specify any of the security algorithms which may be used.

The physical SIM described in this ETS is a removable Integrated Circuit (IC) card. The SIM is an optional device within TETRA MSs. This ETS does not preclude the implementation of fully functional MSs without a SIM. All references to mobile equipment in this ETS are to be taken to mean mobile equipment which have been designed to operate with a SIM.

This ETS deals with all aspects of trunked mode MS operation. For direct mode MS operation key user operation is supported by the SIM but not key holder or key generator operation. Furthermore, storage of information for direct mode MS operation in repeater and gateway mode are supported, but any extra storage required in the direct mode repeater or direct mode gateway terminals themselves is not supported.