PETALUMA, Calif.--(BUSINESS WIRE)--Cyan (NYSE:CYNI), a leading provider of SDN, NFV, and packet-optical solutions for network operators, today raised its revenue range for the fourth quarter ended December 31, 2014. Based on preliminary results, fourth quarter 2014 revenue is expected to be between $30 million and $31 million, exceeding the company’s prior guidance of $24 million to $26 million. “Fourth quarter revenue outpaced our initial expectations due to strong demand for our Z-Series pack