A wireless house alarm is a burglar alarm system that has no physical link from the detectors/sensors to the control panel itself. It does not mean that they have no requirement for mains power. As yet we have not come across a totally wire free house alarm that runs on pure battery power. If you take a look at the Sentry Plus burglar alarm system found in our eBay shop you will find that this is a typical wireless house alarm. The alarm connects to the mains power via a transformer but is fitted with a 24 hour backup battery. The battery is there for 2 reasons
1) If the power fails in your property due to a power cut the alarm will still function for around 24 hours
2) If a burglar breaks into your home and cuts the power or tries to remove the alarms power supply, he alarm will still be powered.
When looking for a wireless burglar alarm system you need to make sure that the alarm you are buying has its own security, by this we mean it should be passcode protected. Any function you need or want to carry out on the burglar alarm system must first have a passcode entered. This will stop any burglar from being able to interfear with your alarm and possibley disable it. The Sentry Plus range of burglar alarms all use the passcode feature, therefore making them a very secure alarm system. To add to the securtiy of the Sentry Plus alarm you can also add a further wireless key pad. This then gives the Sentry Plus its very own security.
The wireless key pad uses a 6 digit pass code compared to the programming 4 digit passcode of the alarm panel, therefore the alarm owner would give out the 6 digit passcode to friends and family so that all they can do is arm and disarm the Sentry Plus alarm system, and then retain the programming 4 digit passcode for themself. By using the wireless key pad it also enables the Sentry Plus to be hidden out of sight, as you would then just have the wireless key pad on the entry exit points. With most wireless alarm systems they have a built in auto dial feature. After connecting the alarm to either a phone line or if it is a GSM burglar alarm, inserting a mobile phone SIM card, the auto dial feature means that should the alarm be triggered, it will telephone the numbers that have been programmed into it and call that person and inform them that the alarm has been triggered. All you do is record a message you want it to play back when it calls, and then when and if the alarm is triggered it will play back your recorded message. This means the alarm system will call people that count and will react to your alarm activation.
As mentioned above there are 2 main types of auto dial alarm system
Landline based auto dial
GSM based auto dial
With a landline auto dial burgalr alarm you connect the alarm to the properties telephone system, by the supplied phone lead, these are typically an RJ11 style of cable (like modem cables) With most of these types of alarm system youwill need to purchase an adaptor that converts the cable from RJ11 to the standard BT socket. If your home has broadband then you may well have a spare filter with an RJ11 socket, if so use this. The Sentry Plus burglar alarm uses this type of connection by default, however you can add to this a GSM module therefore converting the Sentry Plus into a GSM based alarm system.
With a GSM based burglar alarm system you insert a mobile phone SIM card into the correct slot. Then when needed, the alarm system will make its call out of this device. It is far more secure to use a GSM based alarm system and in some cases only a GSM based alarm system will work as there might not be a spare phone line avaliable or perhaps none at all. In our eBay shop you will find a selection of landline based burglar alarms and also GSM based burglar alarms. You will find that the Sentry Plus alarm system is the core system and is supplied with or without a GSM module.