Secured area access system, apparatus, and method

摘要: A secured area access system for providing to a protected is disclosed. In one embodiment, vehicle security system, comprising transmitter, detector, an controller module taught, wherein the transmitter transmits modulated signal into acoustic or optical communications channel, which detected by detector. The detector adapted detect and further have output signal. An receives performs at least processing function. compares processed against encoded stored in memory if it matches send unlock locking mechanism of area, granting area. may also emulated transponder code authorize start