Tellabs' first-quarter 2009 revenue totaled $362 million, down 22% compared with $464 million in the first quarter of 2008. Tellabs earned $7 million or 2 cents per share on a GAAP (U.S. generally accepted accounting principles) basis, compared with $17 million or 4 cents per share in the year-ago quarter.GAAP gross profit margins were 44.2% in the first quarter of 2009, higher than in any quarter since the third quarter of 2006. "Tellabs continues to focus on improving profitability - both our customers' and our own - by helping customers generate...