FTDI USB Drivers

How to know if you need FTDI drivers

  • Is this a new PC?
  • Has OptoTest software or equipment been used on this PC before?
  • When you try to boot up OptoTest software, do you see an error like this?

The ftd2xx.dll error is the most common indicator that the PC is missing these drivers.


IL and RL Testing Application with a Modular Design and SQL Database Support.

Optical Parameter Datalogging with support for Temperature & Humidity.

Multifiber Connectors with Production Applications.

Simplex or Duplex testing, ideal for production.


If you have any questions or comments, we want to hear from you. Don’t hesitate to contact the OptoTest team!

Advancing the World of Fiber Optics®