The Leica TC 407 total station remains a reliable workhorse for surveyors, engineers, and construction professionals worldwide. Known for its precision optics and robust build, this instrument still delivers exceptional field performance.

If you are using the official Leica GEV189 USB cable, the underlying hardware chip is manufactured by Prolific or Silicon Labs, depending on the cable generation.

Check cable connection; ensure Baud Rate matches on both ends.

Plug the USB end of your GEV189 or third-party cable into a functioning USB port on your computer. Connect the Lemo end to the Leica TC 407.

Another program is occupying the assigned COM port, or the software is trying to use the wrong port number.

The Leica TC 407 driver offers several features and benefits, including:

Identify the "Prolific USB-to-Serial Comm Port" or "USB Serial Port".

Today, the "driver" for the TC 407 has evolved. As modern laptops phase out serial ports, the driver ecosystem has shifted toward USB-to-Serial converters and emulators. Leica’s continued support through tools like Leica GeoOffice ensures that the TC 407 remains functional in a modern workflow. The driver allows the instrument to communicate with external data collectors (like the Leica CS10 or third-party rugged tablets), effectively upgrading the usability of the older hardware. Thus, the software driver acts as a preservation tool, extending the lifecycle of the TC 407 by bridging the gap between 1990s hardware architecture and 2020s computing expectations.

Used in many standard and aftermarket GEV189 cables.

If you are using a generic USB-to-RS232 cable (G EV1), you may need to search for "PL2303 Prolific USB-to-Serial Fix" if Windows fails to recognize it. 2. Installation Steps for Leica TC 407 Communication Follow these steps to establish communication:

Comprehensive Guide to Leica TC 407 Driver and Data Transfer Setup

Note the assignation number next to it (e.g., or COM4 ). You will need this exact number in your downloading software.

Note the (e.g., COM3). You will need this number for your data transfer software.

The “LEICA TC407 driver” is a myth — there is no dedicated driver file. Instead, you manage legacy serial communication. If you’re not comfortable with manual COM port setup and terminal testing, consider upgrading to a used Leica TS06 or TS07 with USB/Bluetooth.