| 摘要 |
<p>A motor vehicle control system (Fig.2) and/or security system such as an access control and/or anti-theft and/or anti robbery system, designed to receive a DTMF (dual-tone multi frequency) coded control signals (3), which may serve as PIN (Personal Identification Number) of an authorized user, or as operational codes of the system. The signal reception device (102) of the system may be hidden to enhance security level (120), by requiring pre-knowledge by a potential thief of it's existence and location. The system enables integration of any DTMF compatible communication device as a code entry device for the security system without requiring any modifications of the device.</p> |
