An emergency telephone is a special phone that you can use to call for help in case of an emergency. It is usually found in public places like shopping malls, schools, and hospitals. If you need help, all you have to do is pick up the phone and press the big red button or dial 911, which is a special emergency number.
When you press the button or dial the number, you will be connected to someone who is trained to help you. They will ask you questions about what is happening and where you are so they can send help to you as quickly as possible. Sometimes, the emergency phone also has a camera so the person on the other end can see what is happening and send help even faster.
It is important to only use the emergency phone in case of a real emergency. Don't use it to make prank calls or play around with it because someone who really needs help may not be able to get through. Also, make sure you know where the emergency phone is located in case you ever need it!