| 摘要 |
Authentication cards, so-called SIM cards (subscriber identification module) that need to be inserted into the apparatus before it is put into operation, are required to operate D-network radiotelephones. In order to limit as much as possible complex manipulations of the relatively small chip cards, a chip card holder is mounted in a combined auto radio-radiotelephone between the removable control part of the auto radio (anti-theft protection) and the main apparatus. SIM cards are thus only exchanged when someone else than the authorised person uses the vehicle. |
