I have another call

While talking to someone on a phone, have you ever been put on hold because the person with whom you are speaking wants to speak to someone else who is trying to call? Have you ever been put on hold more than once during the same call? The only time I don't consider these actions rude is when, at the beginning of the call, the person you are speaking with let's you know in advance that they may be getting an important call shortly that they must take. Otherwise, just ignore the beeping. They will probably try to reach you later. That's just my middle aged opinion.