 Used occasionally in television, it is typically for telephone voting for an unscientific opinion poll in relation to news events, for a talk show, or sometimes to win a contest.Although only one telephone number is usually announced, major stations typically have line hunting, with the same number being directed to any available one of several lines within the hunt group.If there are no open lines, the calling party may receive a busy signal as with an ordinary telephone call, or sometimes the special information tones followed by a recorded announcement that "all circuits are busy, please try your call again later".