It is called a speaker or speaker phone Speaker phone is a great convenience, but you need to be careful about when and how you use it You need to consider whether the person to whom you are speaking is comfortable being placed on speaker phone Because it is like broadcasting your entire call to other people who might be listening When you place someone on speaker, anyone passing by or in close proximity can hear both sides of the conversation The person on the other end may not be comfortable with other people overhearing what he is saying, especially if he isn't aware that he is on speaker Exactly. Always ask permission before putting people on speaker phone That is another point you need to be aware of regarding speaker phones. Using them in your cubicle when others are working in adjacent cubicles is inconsiderate You can use it, just be thoughtful. Another reason that people use speaker phones is to be able to have a conversation or phone meeting when everyone involved cannot be present physically Yes, with speaker phones, not everyone has to be in the same room to have a meeting Don't put people on speaker phone without asking permission and don't use speaker phone when it may disturb others