In an arrangement for triggering at least one alarm having at least one mobile data device with an interface for transmitting data and/or electrical currents to at least one other device, and having at least one device linked to the interface, software is stored on the data device. The software has access to physical signals emanating from the interface when the device is disconnected from the interface and which is linked to at least one further component of the data device. This arrangement allows a secure alarm even in hard-pressed situations.