The presence of a
GSM mobile communication module in the alarm design.
Such equipment gives the alarm the ability to send notifications and various data (for example, about the location of the car) to the user's mobile phone and receive commands from this phone via the cellular network. GSM modules, by definition, provide two-way communication, however they can be found in both "pure two-way" and
keyless alarms (see "Type of communication"). The main advantage of GSM over direct communication over a radio channel (through a key fob) is its practically unlimited range: the car can be at least on the opposite side of the globe, the main thing is that it stays in the GSM coverage area. In addition, such a signal cannot be scanned. On the other hand, the use of mobile communications is associated with additional costs — payment for data transfer services, and when the funds on the account are exhausted, this function may become useless. In addition, in close proximity to the car, a key fob or other device with a direct connection is more convenient than a mobile phone: it takes a certain time for commands to pass through the cellular network, while the alarm responds instantly to the key fob. Therefore, this function is used mainly as an auxiliary one, supplementing the main control tool (key fob, label, etc.).
The way of working through GSM networks can be different: some alarm models use vo
...ice communication (usually with control of tone signals from the phone buttons), others work through special mobile applications. The first option is less convenient, but very versatile: it allows you to work from any mobile device, even the simplest one. The second method provides more advanced features, but requires a smartphone with a suitable operating system.The presence of a
GPS satellite navigation module in the alarm design.
By itself, such a module is only responsible for determining the current geographical coordinates of the alarm (and, accordingly, the car in which it is installed), but the further use of such data depends on the alarm model and the capabilities that it provides. GPS data can be used, in particular, for classic navigation (via the on-board computer, advanced radio, etc.), as well as for searching for a stolen car (in beacon mode).
