Couch potato alert: If you get telephone service through your cable TV provider, you don't have to get up while watching TV to see who's calling.
Several cable companies have been experimenting with a feature that will display an incoming caller's name and number in a little box in the corner of the TV screen.
Cablevision Systems Corp., which operates around the New York City area, has offered this feature in several areas and now says that as of Friday it will be available to all 3 million of its cable television customers.
Comcast Corp., the largest cable TV operator in the country, offers the service in one market — which the company declined to identify — and has plans to offer it elsewhere later.
Time Warner Cable Inc. offers it in several areas.
Cablevision says its on-screen caller ID — including an option to turn off the notifications — carries no additional charge. About half of Cablevision's television customers also subscribe to its digital phone service.