One method of increasing the security of a security system keypad access

摘要

An electronic security system is provided with multiple levels of access in which a higher level pass code gives the user access to numerous system functions, such as disarming of the system, resetting, system testing, loop by-passing, and system programming, whereas a lower level pass code gives the user access to fewer functions, in one embodiment to disarming only a portion of the system. In one embodiment, an erasable memory 120 is programmed with a number representing a temporary pass code after the entry of a higher order pass code by the individual setting the temporary pass code. The permanent pass code may be made more complex than the temporary pass code to provide an extra level of security by providing that the permanent pass code has more digits. Timing circuitry 118, 119 is provided to establish a temporary pass code entry window during which a temporary pass code may be entered into the erasable memory. No entry of a temporary pass code within the allotted time results in a disabling of the temporary pass code system. IMAGE