Decision-making and opinion polling conducted by telephone
Televoting (also telephone voting, phone voting, and call-in voting) is a method of decision making and opinion polling conducted by telephone. Televoting can also extend to voting by SMS text message via a mobile cell phone. Broadcast contest televoting. Televoting involves broadcasters providing an audience with different telephone numbers associated with contestants participating; the outcome is decided by the number of calls to each line.
https://en.wikipedia.org/wiki/Televoting