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