Modem

hardwareessential
networking deviceinternet connectionISP equipment

A device that modulates and demodulates signals for data transmission over telephone lines or cable systems.

Examples

Cable modem

Connects to coaxial cable from ISP, provides internet to router

Fiber ONT

Optical Network Terminal converts fiber light signals to ethernet

Common Misconceptions

  • Modem is different from router - modem connects to ISP, router creates local network
  • Combo modem/router units exist but separate devices offer more flexibility

Optimization Tips

Buy your own modem to avoid rental fees

medium impact

Ensure modem supports your internet plan speed

high impact

Restart modem if experiencing connection issues

medium impact

User Impact

Internet speed

Outdated modem can bottleneck your connection

Reliability

Modem issues affect entire home internet

Troubleshooting

Issue: No internet

Solution: Power cycle modem, check coax/fiber connection

Issue: Slow speeds

Solution: Verify modem compatibility with plan speed

Technical Details

Specification: DOCSIS 3.0 supports up to 1 Gbps, DOCSIS 3.1 supports up to 10 Gbps