The people in the elevator suddenly lost power. Can you make an emergency call?

People suddenly lost power in the elevator, and the emergency phone can still be connected.

The specific methods are: turn off the main power switch to avoid sudden calls; Tell the people in the car not to mess around. The elevator has a five-way intercom with emergency power supply, and no cell phone signal is needed. Pick up the handwheel of the computer room and install it on the main machine; Release the brake with the brake release lever, and the other person manually moves the main engine (which side saves labor); Observe the plane mark of wire rope. When the elevator reaches your 1F or B 1F, use the triangle key to open the landing door and let people go.