A telephone with a built-in camera and screen for visual, real-time communications. After AT&T debuted its Picturephone at the New York World's Fair in 1964, many expected videophones to become widely used within a few years. However, it was almost 30 years later, in the early 1990s that AT&T introduced its VideoPhone-branded line of phones at $1,000 each, and a pair was required at minimum. Other videophone vendors entered the market, but the bandwidth limitation of dial-up phone lines, the high cost of entry and the lack of a standard kept videophones from taking off.