The Aztech CNR2800 V90 Modem is a hardware device that allows computers to connect to the internet via a telephone line using the V.90 protocol, which was a standard for dial-up modems, providing speeds of up to 56 Kbps. This modem was commonly used in the late 1990s and early 2000s, before broadband internet became widespread.

To use the Aztech CNR2800 V90 Modem with a Windows computer, you need to install the appropriate driver. Here's how to do that: