What is elevator five-way intercom and what is elevator five-way intercom knowledge?

The five-way intercom of the elevator is for the safe maintenance of the elevator, which is convenient for people to make internal calls when there is no signal on the mobile phone, or if the elevator breaks down, elevator passengers can inform the monitoring room or property management personnel to arrive in time and carry out rescue on the spot.

Five-way intercom specifically includes monitoring room, car roof, machine room, pit and car interior.