| 摘要 |
The invention relates to a main unit (100) for a security alarm for establishing communication between a user of the security alarm and an external central unit (600) linked to a mobile communication network (400). The main unit comprises a processing unit (110), connected to an audio unit (160) for inputting and emitting voice signals, an activation device (120) and a mobile communication unit (130), arranged, on operation of the activation device, to initiate an alarm situation, including establishing a two-way communication connection between the main unit (100) and the external central unit (600). The main unit can be configured and controlled from the central unit (600) in a simple and practical manner. This is achieved by the processing unit (110) being arranged to keep stored in a memory configuration data indicating the connection between the conditions for an alarm situation to be considered to have arisen, and the actions that should be performed in the event of an alarm situation. The processing unit is further arranged to receive a digital message from the mobile communication network (400) via the mobile communication unit (130), and on the basis of the digital message to modify the stored configuration data. |
