Most modern computers lack a native RS232 (serial) port. The CipherLab 308 acts as a "Virtual COM Interface," translating USB signals into the RS232 protocol. Without the specific driver, your PC won't know how to talk to the device, and you'll likely see a "Device Not Recognized" error in your system settings. Where to Download
Most modern Linux kernels include the pl2303 driver natively. No download is needed. cipherlab 308 usb-to-rs232 interface converter driver
: The converter provides power to the scanner through the USB port, so an external power supply is usually unnecessary. 308 USB Virtual COM Understanding the Device Bottom line