120 what should I do if I encounter a ladder control?

120 encountered ladder control and handled it through property management. According to the inquiry of relevant public information, we can contact the property to close when we encounter ladder control during the task of 120. Elevator control is a kind of elevator control technology. Install a system device similar to access control on the original elevator, and the elevator will start after swiping the card and send the owner to the floor it wants to reach.