Not a printer cable. This straight-thru USB to RS232 cable converts a USB port into an RS232 interface on your computer. Pinout and connection - Cable pinout notation: [Computer Side Signal Name (Output Pin #)] - TXD (2), RXD (3), RTS (4), CTS (5), GND (7) Direct device connection - Use this cable to directly connect to a device with a mating DB-25 Female connector. Chipset and driver behavior - FTDI chip based design offers driverless operation in many cases - No CD required - No drivers to install typically - Helps avoid driver-related issues such as blue screen of death caused by Prolific drivers and Prolific Error 10 Compatibility and performance - Designed to provide RS232 signaling via a USB port for devices that use a DB-25 Female connector - Provides standard RS232 signal lines TXD, RXD, RTS, CTS, and common ground reference Use scenarios - Scenario 1: Connect a legacy RS232 device with a DB-25 Female port to a modern computer via USB for data transfer or control - Scenario 2: Access the serial console of network equipment, industrial controllers, or lab instruments that expose a DB-25 Female serial interface - Scenario 3: Interface with development boards or measurement equipment that require a DB-25 RS232 connection when only a USB host port is available Note - This cable is intended for RS232 communication via USB. No additional software is required in many setups, but certain devices or operating systems may still require driver installation depending on system configuration.