NETGEAR CM400 8×4 Cable Modem DOCSIS 3.0


  • Up to 340 Mbps download and upload speed for streaming HD videos, faster downloads, and high-speed online gaming
  • CableLabs Certified for U.S. Cable Internet Services DOCSIS 3.0 is 8 times faster than DOCSIS 2.0
  • Works with Cable Internet Providers like XFINIITY, Time Warner Cable, Cox, Charter, Cablevision & more (not compatible with cable bundled voice services)
  • Fast self activation for XFINITY customers Get connected without a service call. Gigabit Ethernet port Fastest wired speeds to connect your router or computer
  • 8×4 Channel bonding offers the fastest possible cable Internet speeds during peak hours -8 downstream and 4 upstream channels

The NETGEAR CM400 High Speed Cable Modem provides a connection to high-speed cable Internet with speeds up to 340Mbps. It is CableLabs certified and with DOCSIS 3.0 is 8X faster than 2.0. A Gigabit Ethernet port provides faster access and downloads.

Package Contents

  • High Speed Cable Modem-DOCSIS 3.0(CM400)
  • Stand
  • Ethernet cable
  • Power adapter
  • Quick install guide

Lose The Lease.

Is your cable ISP charging you every month just to use their modem? Reduce your bill and bring-your-own-modem. The CM400 is compatible with most major cable service providers.

Save Shelf Space.

The narrow profile of the CM400 lets you tuck it away behind other components and keeps your valuable shelf space open.

Technical Specifications

Number of Ethernet Ports

  • One (1) Gigabit Ethernet port with auto-sensing technology

Key Features

  • Designed to meet DOCSIS 3.0 specifications and backward compatible with DOCSIS 2.0 networks
  • Channel bonding for fast download and upload speeds – (8×4) 343Mbps download & 122Mbps upload
  • Works with Cable Internet Providers like XFINIITY, Time Warner Cable, Cox, Charter, Cablevision & more
  • IPv6 next generation Internet addressing support
  • Gigabit Ethernet port with auto-sensing technology
  • Simple-CD-less installation
  • Memory: 8MB flash and 64MB DDR
  • IPv6 support (Internet Protocol Version 6)

System Requirements

  • Cable Broadband Internet service
  • Please check your cable Internet service provider web site for data speed tier compatibility
  • Microsoft Windows 7, 8, Vista, XP, 2000, Mac OS, or other operating systems running a TCP/IP network
  • Microsoft Internet Explorer 5.0, Firefox 2.0, Safari 1.4, or Google Chrome 11.0 browsers or higher

Physical Specifications

  • Dimensions: 5.8 x 3.8 x 1.8 in (147 x 96 x 30 mm)
  • Weight: 0.44 lb (0.19 kg)



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