A device that adds 3G or 4G (LTE) cellular connectivity to laptops, desktop computers and various tablets. Typically available as an external USB module, for desktop computers, the modem may also ...

(1) (Voice Over IP modem) A device that converts Internet-based voice service from the cable or telephone company to the user's telephones. Officially called an analog telephone adapter.

When a user tries to connect to the internet using a modem, Wi-Fi, or an Ethernet connection and comes across Error 633, there are a few things that could possibly be ...