Some of the calls we receive are recorded, they start talking, ask a question then there is a pause so you can answer. If you answer the recording continues, if you say nothing it gets disconnected. Sometimes we do answer a number we don't know but we do not say hello. It disconnects and we have the number so we can then block it. A few times we didn't say hello and the caller said is this "Jane", I'll say no, then the person says well maybe you can help me anyway. That's when I hang up.