Our null modem serial cables allows two devices to communicate with no conflict in data transmission. Each null modem cable is designed with a rugged, molded construction that provides extra strain relief and a secure connection every time. These cables are foil shielded for EMI/RFI protection from surrounding equipment and flourescent lights. Thumbscrew connectors provide a fast, secure connection every time.Our null modem serial cables allows two devices to communicate with no conflict in data transmission. Each null modem cable is designed with a rugged, molded construction that provides extra strain relief and a secure connection every time. These cables are foil shielded for EMI/RFI protection from surrounding equipment and flourescent lights. Thumbscrew connectors provide a fast, secure connection every time.