The lighting in corridors and toilets is presence controlled, it is regulated automatically depending on whether there are any people in the room. The lighting in offices is also controlled via presence, but can also be turned on and off manually via a pull cord. A short pull on the cord switches the lighting on/off. A long pull dims the lighting.
Please note that if the luminaire is switched off via the pull cord, it will not be switched on via the presence sensor either, until you actively choose to switch the lighting on with the cord again. If it then remains on, it will again be turned on and off automatically by presence in the room.