A special gas extinguishing system was installed in a server room to smother the fire in the event of a fire. A water sprinkler system could have destroyed the entire data centre, so Energen gas was used. In the event of a fire being detected, it is important to inform people that the extinguishing system is in operation and that they are not allowed to enter the room. To avoid panic, a black screen was chosen for the warning sign, which is controlled by the in-house fire alarm centre and is invisible when switched off. In addition, a black filter on the front of our converted STRING 2 ensures that the engraved lettering remains illegible when it is switched off.