Abstract: Test device (1) is for use in a test system for checking transmission procedures in a mobile telephony network. The test device (1) comprises a mobile telephone (2) configured such that it is able to communicate with a subscriber identification module (SIM). Furthermore, the test device (1) has a SIM simulation processor (4) associated locally with the mobile telephone (2), to prepare a SIM simulation which may be connected to other components of the test system. The test device (1) also has a physical SIM card (10) connected to the SIM simulation processor (4) such that the mobile telephone (2) is able to selectively communicate with the SIM simulation or with the physical SIM card (10). A test device (1) is thus provided, the use of which allows a greater flexibility of the SIM data used in the test process.

Abstract: Test device (1) is for use in a test system for checking transmission procedures in a mobile telephony network. The test device (1) comprises a mobile telephone (2) configured such that it is able to communicate with a subscriber identification module (SIM). Furthermore, the test device (1) has a SIM simulation processor (4) associated locally with the mobile telephone (2), to prepare a SIM simulation which may be connected to other components of the test system. The test device (1) also has a physical SIM card (10) connected to the SIM simulation processor (4) such that the mobile telephone (2) is able to selectively communicate with the SIM simulation or with the physical SIM card (10). A test device (1) is thus provided, the use of which allows a greater flexibility of the SIM data used in the test process.

Abstract: A test system (1) serves to check transmission processes in a mobile radio network (2). The latter comprises a central switching computer (8), a local mobile telephone (13) equipped for SIM communication, and a transmission unit (3) comprising a local transmission unit (5). Other components of the test system (1) include a local SIM simulation computer (10), which is connected to the local transmission unit (5) on one hand and to the mobile telephone (13) on the other hand, a control computer (23), which is used for controlling the testing operation, and which is connected to the mobile radio network (2), as well as an authentication computer (14), which is connected to the SIM simulation computer (10) and with which the mobile telephone (13) can be authenticated. For the authentication, a method is used that requires only two communication steps over the remote signal connection.