Final answer:
The keyed switch that recalls elevators non-stop to the lobby or sky lobby during a fire is known as elevator emergency mode. This fireman's service mode is critical for safe evacuation and firefighter access during emergencies.
Step-by-step explanation:
The process described is elevator emergency mode, which is a safety feature integrated into building design to provide immediate evacuation for occupants in case of a fire. Most modern elevators are equipped with a special operation mode that can be activated in emergencies, such as fire conditions, using a special key. When this fireman's service mode is enabled, it allows the elevators to bypass all regular stops and recall directly to a predetermined floor, typically the lobby or a designated sky lobby, to facilitate swift and safe evacuation or to provide firefighters with access to upper levels of the building without being affected by regular elevator traffic.