You mean this-
Retransmission consent
If a broadcaster elects retransmission consent, there is no obligation for the cable system to carry the signal.[2] This option allows broadcasters who own popular stations, such as CBS, NBC and ABC or Fox to request cash or other compensation from cable or satellite providers for signals. These networks have usually attempted to gain further distribution of cable services in which they also hold an equity position rather than direct cash compensation, which cable systems have almost universally balked at paying. In some cases, these channels have been temporarily removed from distribution by systems who felt broadcasters were asking too steep a price for their signal. Examples include the removal of all CBS-owned local stations plus MTV, VH1 and Nickelodeon from DISH Network for two days in 2004, and the removal of ABC-owned stations from Time Warner Cable for a little under a day in 2000.
In the U.S. retransmission consent has often been chosen over must-carry by the major commercial television networks and PBS. Under the present rules, a new agreement is negotiated every three years, and stations must choose must-carry or retransmission consent for each cable system they wish their signal to be carried on.