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URGENT NEWS!! Some of the GSM Service Providers have started to de-register Pay As You Go SIMs if they only send occasional text messages. Our alarm units are now programmed to make a dummy voice call once a month to ensure SIMs stay registered. Software upgrade kits are available for all existing users if they encounter this problem. NEW!! All SMS Units can now be set up and interrogated via any ISP using the internet. See example below using AOL:
Using this method a unit can be fully configured in a couple of minutes at a cost of around 12p!! No special skills or tools are needed to set up any of our equipment! Links:
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