| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a capacity increases and driving view is interfered when an on-vehicle ETC(electronic toll collection) device and a prepaid card-type radio telephone set are arranged in individual casings and both devices are required to be made common for reducing the occupied space. SOLUTION: The device incorporates the signal processing function of the prepaid card-type radio telephone set and has a reading/rewriting means used in common for the reading and writing of the telephone card of the prepaid card-type radio telephone set and the ETC card of the toll road automatic toll collection system. A receiver used in common for a transmitter microphone and an informing loudspeaker is disposed as the hands-free device of the prepaid card-type radio telephone set. |
