A modem is a network device that converts digital data from a computer into analog signals for transmission over telephone or cable lines, and vice versa.
Modem (Modulator-Demodulator): A device that modulates digital signals into analog for transmission and demodulates incoming analog signals into digital form.
| Specification | Description |
|---|---|
| Connection Types | DSL, ADSL, Cable, Fiber, 4G/5G LTE |
| Ports | 1 WAN (coaxial/DSL/fiber) + 1 Ethernet LAN (RJ45) |
| Speed | Varies by type (e.g., 100 Mbps to 1 Gbps or more) |
| Built-in Router | Some modems come with integrated Wi-Fi router (modem-router combo) |
| Indicators | LED lights for power, internet, DSL, LAN activity |
| Compatibility | Must match ISP and line type (e.g., DOCSIS 3.0/3.1 for cable ISPs) |
A modem is a key device that enables internet access by converting signals between digital and analog formats. It is essential for connecting to an ISP and is often used alongside a router in home or office networks.