Ameritech Corp., Chicago, was ordered to pay a total of $175.7 million to 17,000 retired workers as part of a federal court settlement because the company miscalculated pension benefits. U.S. District Court in Belleville, Ill., ordered Ameritech, a unit of SBC Communications Inc., San Antonio, to recalculate its workers benefits and compensate them accordingly, said David Pacholczyk, Ameritech spokesman. Starting this fall, workers who retired since 1994 will get payments that could reach up to $30,000 each. The payments include interest earned at 5%. Funding will come from Ameritechs $15.2 billion pension trust.