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Application for GSM+PSTN alarm system with two way communication with sensors

New RFID function gsm alarm system with below feature.

1. GSM+PSTN Network, PSTN is backup for GSM network

2. Words LCD display for easily operation.

3. RFID function for house care or kids usage ,it’s convenient for them to disarm without knowing password.

4. Two way communication with alarm host and alarm sensors, alarm host will check whether alarm sensors is in working status every 8 hours.

5. When user arm the system, alarm host will check whether door/window are closed, if not closed, LCD display will remind user which door is open, and user can arm the system successfully until all doors/windowsare closed.

6. Doorbell feature.