The Modem X080C CDMA Modem AT Port Windows driver is software that allows your computer to communicate with a CDMA-based modem (such as the X080C model) via an AT (Attention) command interface. This type of modem is typically used for mobile broadband connections, especially in areas where wired internet connections are not available, using cellular data networks (CDMA network).

The AT Port refers to the serial communication interface (either physical or virtual) that the modem uses to send and receive data commands and responses, typically using the AT command set, which is a standardized language used for communication between the computer and modem.