MELVILLE, N.Y.--(BUSINESS WIRE)--September 28, 2015-- Comtech Telecommunications Corp. (NASDAQ:CMTL) today reported its operating results for the fourth quarter and fiscal year ended July 31, 2015. Net sales for the three months ended July 31, 2015 were $77.5 million compared to $89.4 million for the three months ended July 31, 2014. The year-over-year decrease reflects lower net sales in the Company's telecommunications transmission and mobile data communications segments, partially offset by