A cellular modem is a device that connects to a cellular network to enable wireless data transmission. It provides internet access to devices and systems in locations where wired connections are impractical or unavailable. Cellular modems play a crucial role in IoT (Internet of Things), industrial automation, remote monitoring, and mobile communication.

How a Cellular Modem Works
A cellular modem uses a SIM card and a mobile network (2G, 3G, 4G LTE, 5G) to establish a wireless connection with the internet or private networks. It can be embedded inside a device or an external unit connected via USB, Ethernet, or serial interfaces.

Types of Cellular Modems
USB Cellular Modems (Dongles) – Plug-and-play modems for laptops and computers.

Embedded Cellular Modules – Integrated into IoT devices, sensors, and industrial controllers.

Industrial Cellular Routers & Gateways – Provide secure, high-speed connectivity for remote sites.

M2M (Machine-to-Machine) Modems – Enable communication between industrial machines and control systems.