The Universal GSM module is easy to connect (install) with your HomeGuard or other PSTN alarm panels, by inserting a telephone wire in both analogue inputs. The GSM module enables the control panel to communicate via cellular networks. The modem translates the analogue signals and converts them into a GSM signal. A SIM card (prepaid or subscription from any provider) has to be placed inside the GSM module. The GSM module creates a two-way communication. This enables your security system to send an alarm alert to your mobile phone in cause of an emergency, and makes it possible to monitor and control your security system remotely. This model is supplied with an E-plug.