A modem, short for modulator-demodulator, is a networking device that connects devices to the internet. It typically converts analog signals into digital format, represented by 0s and 1s. The operation of all modems is similar; even external modems perform the tasks of modulation and demodulation simultaneously. Sometimes referred to as signal translators, modems modulate digital signals for transmission.
To connect to a Wi-Fi system, you need both modems and routers to enable communication with multiple devices. Many brands offer top-notch, reliable modems with unbeatable performance, including Digi International, Toshiba, 3Com, Compaq, IBM, Dell, HP, and others.
Choose a new modem if you need to connect a few devices. However, for supporting an enterprise-grade network with multiple devices, consider refurbished modems that have been rigorously tested and guarantee performance at a fraction of the cost.