The GSM / SMS Communicator is a wireless communication module for the conventional alarm system to notify the Central Monitoring Station (CMS) and the users of an alarm system. It ensures that distress signals can be transmitted, especially during the activation of an alarm system even when the conventional ‘land-line’ is tampered, cut or disabled. It can also be used to monitor power supply. Communications are via the highly reliable and fast SMS messages available from the local GSM networks. The SMS Communicator is designed as an add-on module to the existing alarm system. It is easy to install and can be adapted to most existing alarm systems.