FCC warns about 'One Ring' calls Unlisted Video

According to Broadcasting and Cable, The FCC has issued an alert to be on the lookout, or in this case "listenout" for "waves" of one-ring, or "wangari" robocalls.
Those are a series of scam calls, often in the middle of the night, that don't give people a chance to answer in hopes that the curious or concerned will call back and rack up per-minute charges on the order of 900 numbers.