| 摘要 |
The invention relates to a switching apparatus (4) for alternately connecting a mobile radio module (2) and an E-call controller (3) to an antenna (5), having: a first signal input (10), a second signal input (12), an antenna connection (14) and a changeover device (15) that is designed to take at least one switching signal (22) as a basis for changing between a first switching state (S1) and a second switching state (S2), wherein in the first switching state (S1), only the first signal input (10) is electrically connected to the antenna connection (14), and in the second switching state (S2), only the second signal input (12) is electrically connected to the antenna connection (14). Connected transmission devices are not intended to diagnose decoupling from the antenna connection as a fault. In the second switching state (S2) or in both switching states (S1, S2), in each case, the changeover device (15) electrically connects the signal input (12, 10) that is decoupled from the antenna connection (14) in each case to a terminating device (18) and the terminating device (18) emulates an antenna at the signal input (12, 10) that is connected to said terminating device. |
