The ZTE Voice Port FFFE Windows driver is a software component that allows your Windows computer to communicate with a ZTE device (such as a USB modem, mobile hotspot, or other communication device) via its voice port. The driver ensures that the system can properly interface with the device for tasks like sending/receiving voice calls, messages, or data over a cellular network.

The FFFE label might refer to the device's unique identifier or model number used in the Windows driver system. If you're seeing this in the context of a device connected to your PC (such as through USB), it's likely that the Windows system has identified it but is lacking the appropriate driver to fully function.