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A5 GSM (Cell Phone) Fire/Burglar Alarm Auto-Dialer and SMS Sender SIM Card dialer


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The A5 GSM Alarm Dialer is ideal for use in Burglar or Fire Alarms as a universal fit cellular phone (GSM) Auto-Dialer/SMS Message Sender (mobile phone based dialler).  It allows remote home/business security monitoring without a phone line. With two inputs both the bell and alarm status can be monitored. If the alarm is triggered a user customisable SMS message can be sent to up to 64 numbers. Additionally up to 64 numbers can be called to instantly alert users to the alarm sounding. 




Using the output relay the alarm can be silenced by any master user by sending the word 'silence' in a SMS message to the dialer.


If your alarm features additional outputs, such as a SET/UNSET output, this can also be monitored using input B allowing you to be notified when your alarm is armed and disarmed.

Programming is performed by SMS text using real word command like 'add' and 'remove' and can be done remotely at any time.  There are no annoying passwords to remember as you are identified to the system by your mobile number.


Additionally the dialer can be programmed using a PC remotely over the internet using our Web Client software available from our Downloads page



A complete list of accepted telephone numbers can be viewed remotely via SMS text message or using the PC software available from our website


Balance checking is available using the FORWARD, SMS and DIAL commands (see manual).


The manual can be downloaded from here:


Maunal:  A5.02 F6.05


Quick Start Guides available here:


QSG A5 v6.05

Email Quick Start Guide


Please note the board is supplied with a suitable antenna and 10cm SMA cable only.


The A5; Burglar alarm system that calls you without using a landline phone line


The enclosure is available as an option.


Anything else I need to know?


All PCBs are supplied with a quad band stub antenna and a PCB to aerial connector cable (~15cm long).  Anrtennas should be mounted outside of metallic enclosures.  The PCB connector is a U.FL connector and the aerial connector is a standard GSM SMA connector shown below (should an extension cable be required).


SMA Conector for use with GSM Alarm Dialer


Our optional sticky backed antenna makes installation quick and simple however this can only be mounted on non-metallic thin surfaces.  Various antennas are available from our wesbite - please see 'Accessories'. 



When deciding on which network to use we recommend that you search on the network provider home page to ensure you will receive a good signal in your geographic location. Please note GSM products do not work with 3G only networks such as 'Three'.  The Site Finder website is very useful for finding your closest mast and network


For indoor appplications the PCB fits into the Hammond 1591B enclosure.


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