Cell phone security system

By Jason Chiang

Keyless entry has been a luxury whose availability is confined primarily to
vehicles. The cell phone security system takes this idea of keyless entry and transforms it
into a convenient, versatile security system that utilizes cell phone technology and the
landline telephone network. By taking advantage of caller identification and dual-tone
multi-frequency signaling, the security system has the ability to introduce two-levels of
security. The first level will be decoding the calling party’s identification information
while the second level would consist of the user attempting a password entry over the
phone. The system also has the ability to provide feedback to the user regarding the state
of the system through a special user mode. By combining the mobility of this
telecommunication medium with microcontrollers, the system achieves a secure,
convenient, and automated form of security for a place of residence.

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