The Smart Link 56K Voice Modem is a type of internal or external dial-up modem used for internet connectivity over telephone lines, typically at speeds up to 56 Kbps. It also has the ability to transmit voice calls, meaning it can be used for both internet access and regular telephone calls over the same line. Smart Link is the brand of the modem, and "56K" refers to the maximum speed (56 kilobits per second) the modem can theoretically achieve.

A Windows driver for the modem is software that allows the operating system (Windows) to communicate with and use the modem hardware. If you're using a Smart Link 56K Voice Modem and need to install the driver, here's a general guide on how to do that.