This article covers NETGEAR Nighthawk マルチギグケーブルモデム (CM2000).

Overview

The NETGEAR Nighthawk CM2000 is a DOCSIS 3.1 cable modem designed for multi-gigabit internet plans. It supports downstream speeds up to 2.5Gbps and features a single 2.5 Gigabit Ethernet port. Compatible with major US cable providers like Xfinity, Spectrum, and Cox, this modem lets you eliminate monthly rental fees while future-proofing your home network. Unlike older DOCSIS 3.0 modems, the CM2000 delivers up to 10x faster speeds thanks to OFDM(A) 2x2 channel bonding. It does not include a built-in router, so you will need a separate Wi-Fi router to create a wireless network.

Connectivity & Compatibility

Supported providers: Xfinity, Spectrum, Cox, and other major cable internet providers Not compatible with: Verizon, AT&T, CenturyLink (DSL/fiber), DirecTV, DISH, or bundled voice services Interface: 1×2.5 Gigabit Ethernet port (RJ-45) Standards: DOCSIS 3.1 (backward compatible with DOCSIS 3.0), 32×8 channel bonding, OFDM(A) 2×2 Router compatibility: Works with virtually any standard Wi-Fi router Power: AC 100–240V (50/60Hz)

Product Info

Released in 2021, the Nighthawk CM2000 is positioned as a high-end cable modem. It is available through NETGEAR's official store and major retailers like . The package includes the modem, power adapter, Ethernet cable, and quick-start guide. Warranty is 1 year from the manufacturer.

Best Use Cases

Cable internet users looking to save on rental fees: Instead of paying $10–$15 per month in modem rental fees, buying the CM2000 pays for itself within about a year. Over two years, you could save over $200. Subscribers of multi-gigabit plans (2Gbps or higher): The 2.5Gbps Ethernet port ensures you can fully utilize the fastest cable internet tiers available today or in the near future. Users who prioritize reliability and stability: NETGEAR's Nighthawk series has a strong track record for consistent performance and regular firmware updates, making it a solid choice for always-on home networks. Not ideal for: Fiber or DSL subscribers, or anyone who needs an all-in-one modem/router gateway. You will need a separate router.

Things to Consider

The CM2000 is designed for use within the United States. It may not be officially supported by cable providers in other countries. Always check your provider's approved modem list before purchasing. No built-in router or Wi-Fi. You must connect a separate router to the Ethernet port for wireless connectivity. * To achieve 2.5Gbps speeds, your internet plan must be at least 2.5Gbps, and both your router and Ethernet cables (Cat6 or higher recommended) must support 2.5GbE. On slower plans, the modem will operate at the plan's maximum speed. ## FAQ
Q: Can I use this modem with my cable provider outside the US? A: Officially, the CM2000 is certified only for major US cable providers (Xfinity, Spectrum, Cox). Using it with other providers may result in compatibility issues or lack of support. Check with your local provider for approved modem models. Q: Do I need a separate router? A: Yes, the CM2000 is a modem only. You will need a Wi-Fi router connected to its 2.5GbE port to create a wireless network. Q: What if I'm not getting 2.5Gbps speeds? A: First, confirm your internet plan offers 2.5Gbps or higher. Then ensure your router and Ethernet cables support 2.5GbE. If everything checks out, try updating the modem's firmware or contacting your provider to verify provisioning.

Product Disclosure (Amazon)

  • Manufacturer: NETGEAR
  • Seller: Kahala Market(輸入品専門店)
  • Fulfilled by: Kahala Market(輸入品専門店)
  • ASIN: B08GWNZ9VF
  • Note: This article covers a manufacturer-made product based on Amazon listing details.