Gsmmodem

GSM Alarms with SMS control works with GSM-modems

Moveable GSM alarm for Farmhouse
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Many alarm inputs can be connected in series.
If any one make alarm , the gsm alarm sends a SMS message to 1-8 receivers

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GSMALARM20 has 2 relays, 2 alarm inputs , 2 temperature sensors, a GSM modem GS64, antenna, power supply 230/12V
The customer provides a SIM card without PIN-code

GSM alarm Web shop

Manual

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GSM LOCK operate with the code for spare part delivery problem at off office hours

It the courier is bringing a packet at the night to postbox, he gets one time code and door opens when he use it by his cell phone ( SMS message)
A serviceman get his own code and opens the door
Now the codes are used

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