This article covers NETGEAR Nighthawk DOCSIS 3.1 ミッド.

Overview

The NETGEAR Nighthawk CM3000 is a DOCSIS 3.1 cable modem engineered for the latest mid/high split technology. It delivers up to 2.5Gbps download and 1Gbps upload speeds, making it ideal for gigabit-plus plans from providers like Xfinity (2Gbps down / 200Mbps up with mid-split) and Spectrum. This modem is designed to work with all major U.S. cable ISPs, replacing rental modems and saving up to $300 per year in fees. Equipped with one 2.5 Gigabit Ethernet port and two Gigabit Ethernet ports supporting link aggregation, the CM3000 can feed multi-gig routers and mesh systems. Pair it with a NETGEAR WiFi 6E or WiFi 7 router to unlock the full potential of your internet plan. The compact, upright design fits easily into any networking stack.

Connectivity & Compatibility

The CM3000 connects to your cable line via a standard coax connector (F-type). On the LAN side, it offers one 2.5GbE port (RJ-45) and two 1GbE ports (RJ-45). The two Gigabit ports can be aggregated to provide up to 2Gbps total bandwidth to a compatible router (LAG support). A reset button and power jack complete the rear panel. Compatibility extends to all major U.S. cable ISPs: Xfinity (Comcast), Spectrum (Charter), Cox, Optimum (Altice), and others that support DOCSIS 3.1. The modem specifically supports mid/high split frequencies, enabling faster uploads where the ISP has deployed that technology. Important: The CM3000 is certified for use only within the United States. It will not work with Japanese cable TV services or non-North American ISPs.

Product Info

Released in 2024, the NETGEAR Nighthawk CM3000 sits at the high end of the cable modem market, targeted at users with multi-gig internet plans. It is one of the few retail modems that fully supports mid/high split DOCSIS 3.1, making it future-proof for ISP upload speed upgrades. The retail price is around $240–$280 USD (approx. ¥63,000 in Japan via import). The warranty is one year. Package contents include the modem, power adapter, a 2.5GbE-rated Ethernet cable, and a quick-start guide.

Best Use Cases

Users with 1–2 Gbps cable plans from Xfinity or Spectrum: If your ISP offers mid/high split speeds, the CM3000 is the only retail modem that can fully utilize those upload speeds (up to 1 Gbps). Ideal for content creators who upload large video files or run a home server. Gamers streaming 4K gameplay or hosting multiplayer sessions: The increased upload bandwidth eliminates lag during live broadcasts and video calls. Combined with a multi-gig router, the CM3000 ensures your gaming rig has a fast, stable connection. Cord-cutters looking to eliminate ISP rental fees: By purchasing the CM3000, you can return your provider's rental modem. Over two years, the savings often cover the entire purchase price. Not recommended for users with plans under 500 Mbps or those outside North America, as the modem is overkill and region-locked.

Product Disclosure (Amazon)

  • Manufacturer: NETGEAR
  • Seller: セトウチInternational market
  • Fulfilled by: セトウチInternational market
  • ASIN: B0D3FHM3BC
  • Note: This article covers a manufacturer-made product based on Amazon listing details.