Null modem cables and adapters connect two serial devices that require a null modem (cross-wired) configuration. This 6ft cable has a DB9 female connector on one end and a DB25 male connector on the other. Superior molded cables with foil-shielding offer maximum EMI/RFI protection. Gold-plated connectors and contacts provide superior conductivity. Tripp Lite warrants this product to be free from defects in materials and workmanship for life.