Convert a DB9 male port to a DB25 male port Our AT925FM DB9F to DB25M cable adapter converts a 9 pin serial port to a 25 pin male connector. Backed with a lifetime warranty. The StarTech.com Advantage - A cost-effective way of converting a 9-pin female serial port to a 25-pin male port - Easy to use and intall - Backed by StarTech.com's lifetime warranty