The AEK Energie AG is the leading energy supply company in the Jurasüdfuss region. The company, founded in 1894, manages a large range of different facilities that has been growing in the course of time and, among others, operates about 40 central heating plants at present. The gradual growth also reflects in the alarm sys-tems – several different independent solutions existed. This variety and the cooperation with different suppliers caused unnecessary extra expenditure. Therefore, the AEK Energie AG was looking for a new, user-friendly and efficient solution to replace all other systems. A requirement was that the large number of available control systems had to be linked up reliably, for which interfaces with special programs had to be developed in some cases.