Tri Band Autodial GSM SMS LCD Security Alarm System
Posted: Sunday, December 19, 2010
by Coral Gong
About the alarm system
This alarm system has large LCD screen to display clearly all alarm states. Intelligent dual network alarm function supports GSM network and fixed telephone line at the same time. It works with 900/1800/1900Mhz GSM network, which means it can be used in all countries supporting GSM network. It will auto-dial 6 preset phone numbers via fixed telephone / GSM network line and send short messages (SMS) when system alarms.
This alarm system is easy to install and operate. It can prevent from unlawful intrusion, fire accident, leakage of harmful gases and much more; widely used for security protection, remote monitoring in houses, shops, villas, financial offices and factories, etc.
How does it work?
1) Firstly, you must prepare a SIM card which must be sure of valid use period. Then insert the SIM card into the proper position of the main unit and plug in the external power adapter. The main unit will be in the initial status.
2) Next step is to test GSM signal. LCD displays “INIT--00 00” and LED indicator flashes rapidly at the beginning. After the main unit receives GSM signal, if LED indicator flashes slowly and the main unit give out one long “beep” sound, which means GSM signal is normal. If the main unit gives out three “beep” sound, which means GSM signal is abnormal.
3) When emergency happens, the main unit will alarm over the phone if the fixed telephone line is available. Or the main unit will send out SMS first, then alarm over the phone if GSM signal is normal. If telephone line is cut off when alarm by call, the main unit will alarm automatically through GSM network.
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