The Novatel Wireless Expedite EV-DO Diagnostics Port is a driver for a communication port used by Novatel Wireless EV-DO (Evolution-Data Optimized) modems or data cards, typically for mobile broadband or cellular internet connections. This diagnostics port is used by the device to provide detailed diagnostic information and enable communication between the modem and your computer.

The Windows driver for the EV-DO Diagnostics Port is specifically needed to allow your computer to recognize and interact with the modem's diagnostic functions. In many cases, the driver is installed automatically when you install the Novatel Wireless modem or data card's main driver or software package. If not, you may need to manually install the driver.