DOCSIS 3.1

Ultra-High Speed Cable Modem

Industry's First Cable Modem Supporting Gigabit Service Plans

Ultra-High Speed Cable Modem

Model: CM1000

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Industry's First Cable Modem Supporting Gigabit Service Plans

The NETGEAR CM1000 Ultra-High Speed Cable Modem provides a connection to high-speed cable Internet with speeds up to 1 Gbps†. It is the industry’s first DOCSIS® 3.1 CableLabs Certified® cable modem, 10X faster than DOCSIS 3.0††. Working with DOCSIS® 3.0 and DOCSIS® 3.1 cable Internet service providers, it is the ultra-high speed cable modem ready for today’s service plans and future upgrades. Enjoy ultra HD video streaming over IP with 2x2 OFDM or 32x8 channel bonding giving you the fastest download speeds—even during peak hours. Save up to $120 a year* by eliminating Internet service provider rental fees. Ideal for fastest Internet cable services like Comcast XFINITY® Gigabit, Extreme and Performance data plans.

Enjoy uninterrupted 4K UHD video streaming with this ultra-high speed cable modem.

DOCSIS 3.1 technology brings blazing fast cable Internet speeds to your home.

DOCSIS 3.1 technology takes Internet speeds to a whole new level, considerably reducing latency for gaming and enhancing user experience for high-speed applications like virtual and augmented reality. NETGEAR CM1000 DOCSIS® 3.1 Cable Modem provides a connection to high-speed cable Internet with speeds up to 1Gbps. A Gigabit Ethernet port provides faster access and downloads.


  • Up to 1 Gbps‡ download speeds for streaming HD videos, faster downloads, and high-speed online gaming —Ideal for XFINITY® Gigabit/Blast/Extreme Internet plans
  • 32 downstream and 8 upstream channels for DOCSIS 3.0 connections
  • 2 OFDM downstream & 2 OFDM upstream channels for DOCSIS 3.1 connections provide fast and reliable Internet access
  • Works with XFINITY® from Comcast (not compatible with Cable bundled voice services)
  • Fast web based self-activation for XFINITY customers—Get connected without a service call
  • Gigabit Ethernet port—Fastest wired speeds to connect your router or computer
  • Save money over time by owning your cable equipment and avoiding monthly rental charges from your Internet provider—up to $120 per year

Technical Specifications

  • Modem

    • CableLabs and Comcast certified DOCSIS 3.1 Cable Modem

  • Product Diagram

  • Number of Ethernet Ports

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

  • Key Features

    • Fast download and upload speed enables up to 1 Gbps‡ download speeds

    • 2 OFDM downstream & 2 OFDM upstream channels for DOCSIS 3.1 connection

    • 32 downstream and 8 upstream channels for DOCSIS 3.0 connection

    • Meets DOCSIS 3.1 specifications and is backward compatible with DOCSIS 3.0 networks

    • Works with XFINITY® from Comcast (not compatible with Cable bundled voice services)

    • Gigabit Ethernet port with auto-sensing technology

    • Simple—CD-less installation

    • Memory: 128 MB NAND flash and 256 MB RAM

    • DOCSIS Quality of Service (QoS)

    • 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 and to ensure it provides DOCSIS® 3.1 service, otherwise this modem will only work as a DOCSIS® 3.0 modem

    • Microsoft® Windows® 7, 8, 10, 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

    • Not compatible with Cable bundled voice services

  • Physical Specifications

    • Dimensions: 8.8 x 5.4 x 5.9 in (222.7 x 135.9 x 149 mm)

    • Weight: 0.84 lb (380 g)

  • Package Contents

    • Ultra-High Speed Cable Modem—DOCSIS 3.1 (CM1000)

    • Ethernet cable

    • Quick start guide

    • Power adapter

  • Standards

    • One (1) LAN Gigabit Ethernet port

    • One (1) WAN coaxial cable connection

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* Based on a typical monthly equipment rental fee of $10 per month.

† 6Gbps is the maximum data transfer rate in the DOCSIS® 3.1 standard. In practice, your Internet speeds will be less, as the transfer rate through the CM1000 Gigabit Ethernet port is limited to 1Gbps. The transfer rate may also be reduced by the volume of network traffic or your service plan.

†† Maximum rate is derived from DOCSIS® 3.1 specifications and actual throughput will vary depending on your Internet subscription with your provider.

NETGEAR makes no express or implied representations or warranties about this product’s compatibility with any future standards.

Customer-owned modems may not be compatible with certain cable networks. Please check with your cable provider to confirm this NETGEAR modem is allowed on your cable network. This product not compatible with Cable bundled voice services.

Ideal Uses

Ultimate Speed

The CM1000 cable modem supports up to 1Gbps and can be used with your provider's fastest cable Internet speed tiers. Whether you're simply surfing the web or streaming multiple HD videos simultaneously, you'll stay connected with speed and reliability.

Learn more about DOCSIS(R) 3.1 technology

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 CM1000 is ideal for XFINITY® Gigabit, Extreme and other Internet plans.

NETGEAR Warranty

This product is backed by a NETGEAR limited 1-year Hardware Warranty.

24/7 basic technical support provided for 90 days from purchase date, when purchased from a NETGEAR authorized reseller.