This explanatory document describes the potential risks associated with the use of IT infrastructures external to the system when the current DIN VDE 0834 standard is not observed.
Call systems for alarm signalling are designed to help people who are unable to help themselves, especially in emergency situations, and to save lives and avert danger. For this purpose, DIN VDE 0834 requires these systems to have a conductor and transmission network of their own, independent of external systems and monitored and controlled by the equipment of the call system. The call function must have the highest priority and be assured at all times.
DIN VDE 0834 prohibits transmission routes of other systems being used by call systems. Transmission routes of external systems may be used between organization groups and external services only if it is ensured by continuous risk management that the requirements of DIN VDE 0834 are met. Within the organization groups of the call system, no transmission routes other than those of the call system itself may be used.
Where the call system uses the building's wiring structure, the following must be observed:
The following must be observed when active network components are used: