25ft DB25 male to DB9 female null modem cable allows two DTE or DCE devices to communicate with no conflict in data transmission. Transmit and receive signals are crossed to ensure proper data transmission. Used as serial printer cable. Each null modem cable is designed with a rugged, over molded construction that provides added strain relief and a solid connection each time. The cable is foil shielded for EMI/RFI protection from surrounding office equipment and fluorescent lights. Thumbscrew connectors provide a fast, easy connection every time.