A modem is a network device that both modulates and demodulates analog carrier signals (called sine waves) for encoding and decoding digital information for processing. Modems accomplish both of these tasks simultaneously
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ARRIS SURFboard DOCSIS 3.0 Cable Modem / N600 Wi-Fi Dual-Band Router. Approved for XFINITY Comcast, Cox, Charter and most other Cable Internet providers for plans up to 150 Mbps.(SBG6580) - Walmart.com
Modem Vs Router: Know The Exact Difference
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Shopping for a cable modem? Read this first! - CNET
What is a Modem (Modulator/Demodulator)?
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