This null modem DB9 9 pin female to DB25 25 pin female serial cable is ideal for two DTE, two computers devices to communicate with no conflict in data transmission. The transmit and receive signals are crossed to ensure proper data transmission. Double shielded for maximum EMI/RFI protection. Crossover pin. Cable color: Beige. AWG: 28 AWG. Standards: RoHS, UL, CSA, ISO 9001:2000 manufacturer.