Greatings for this idea going to BezeqInt and their stupid customer support (more details will follow).
Sometimes, when talking with support people, it's not a bad thing to record conversation that can save your ass in a future. So, instead of warning them by yourself all the time (price negotiation can go beyond 3-5 calls a day), we need a waiting tone that do that for us. It's a track that playing when somebody calls you and hear it instead of old-school single tones. It will do the job and also fun for people calling you, right huh? ;-)