These intruder alarms also have internal & external audible ringers or sirens. As with “audible-only” systems, the external bell will ring for a maximum of 20 minutes in the UK.
There are 2 main products, one that uses a land-line (speech dialler), one that uses the GSM network.
These are designed to be connected to your burglar alarm using a standard home phone “land-line” in order to send an alert to pre-set phone number(s) when your alarm is triggered. It’s a good way of being informed of an alert when you are away from the property.
Similar in some ways to an answerphone, you record you chosen message and input the contact numbers of the person(s) you want the dialler to call in the event of an alert.
In the event that the alarm goes off, it will call the pre-set numbers in the order programmed into the system and the recipient of the call will hear your recorded message. Your message should be clear about what you want the person to do.
The recipient of the call can then prevent the dialler from calling the next number on the list, usually by entering some code on the keypad of the phone.
Mobile phone networks or GSM (Global System for Mobile Communications) can be taken advantage of to contact owners or key-holders.
GSM diallers that are connected to your burglar alarm can not only make calls, they can also send text messages.
You need to programme the GSM dialler with your mobile contact number & the number(s) of your chosen responsible person(s).
Features include reply to the text with a code that will stop further messages for this alert going out on the listed numbers. Some systems will allow remote disarm or re-set – handy for false alarms.
It is prudent, to only list persons (apart from yourself) who can get to the scene quite quickly, otherwise it will defeat the purpose of this function.
In order to use a GSM dialler, you have to put a SIM card into it. If you use a “pay-as-you-go” SIM, then don’t forget to make sure it has enough credit at all times.