Bring wine, sugar, cinnamon, and peppercorns to boil in large pot, stirring occasionally, until sugar dissolves. Reduce heat to low, add pears, and simmer, covered, until pears are nearly tender, about 10 minutes. Remove from heat and let cool to room temperature, about 30 minutes. Refrigerate until chilled, at least 2 hours or up to 3 days. Using slotted spoon, remove pears from liquid and slice thinly crosswise; discard liquid (or reserve for another use).