NETGEAR Nighthawk CM3000 2.5 Gbps Cable Modem Quick Start Guide

Support and Resources

For product registration, help, latest downloads, user manuals, and community access, visit https://www.netgear.com/support. We recommend using official NETGEAR support resources.

For regulatory compliance information, visit https://www.netgear.com/about/regulatory. Please review the regulatory compliance document before connecting the power supply.

Compatibility with your cable network may vary. Check with your cable Internet provider to confirm that this NETGEAR cable modem router is allowed on your network.

If you encounter installation issues, contact NETGEAR Technical Support at 1-866-874-8924.

Cable Internet Provider Support Contacts

Cable Modem LEDs

Setup Instructions

Package Contents

• Cable modem
• Ethernet cable
• Power adapter

Before returning this product to the store for any reason, call NETGEAR Technical Support at 1-866-534-9377 or visit https://kb.netgear.com/000061156/How-can-I-troubleshoot-my-cable-modem.

Getting Started

1. Turn off and disconnect existing modems and routers.

   If you are replacing a modem that is currently connected in your home, unplug the modem and plug the new cable modem into the same outlet.

2. Connect a coaxial cable.

   Use a coaxial cable to connect the cable port on the cable modem to a cable wall outlet. Ensure the cable is tightly connected. Connecting directly to a cable wall outlet is recommended. If you must share the connection, use a 3.5dB (1 to 2) splitter.

   [Diagram description: A coaxial cable connects the cable modem to a cable wall outlet.]

3. Connect the power adapter.

   Connect the power adapter to the cable modem and plug the power adapter into an electrical outlet. The cable modem might reset multiple times when it is powered on.

   [Diagram description: A power adapter connects to the cable modem and an electrical outlet.]

4. Wait for the Online LED to light solid white.

   This process might take up to 10 minutes. When the cable modem comes online, the Online LED stops blinking and lights solid white. If the Online LED does not light solid after 10 minutes, ensure the cable outlet is working or call your Internet service provider (ISP) to confirm you have service.

   Note: When the Online LED lights solid, your cable modem is not yet connected to the Internet. You must connect a router or computer to your cable modem and then activate your cable modem with your cable Internet provider.

5. Connect a router to your cable modem.

   a. Connect the LAN port on the cable modem to the WAN or Internet port on the router.

   b. Your cable modem comes with plugs covering the Ethernet 1 and 2 ports. Remove these plugs to connect a router that supports Ethernet port aggregation. For more information, refer to the CM3000 user manual.

   c. Power on the router.

   d. Connect your computer or mobile device to the router.

   [Diagram description: An Ethernet cable connects the modem's LAN port to the router's WAN/Internet port. A computer connects to the router.]

6. Collect the following information:

   • Your cable Internet provider (ISP) account information
   • Cable modem model number: CM3000
   • Cable modem serial number
   • Cable modem MAC address

7. Activate your Internet service.

   Use the ISP's activation app (e.g., Xfinity app from Apple App Store or Google Play) or visit their activation website. Follow the prompts to activate your service.

   Cable Internet Provider	Activation Contact
   Cox	1-888-556-1193
   Mediacom	1-855-Mediacom (1-855-633-4226)
   Optimum	1-877-810-6750
   Sparklight	1-877-692-2253
   Spectrum	1-833-267-6094
   Xfinity	Use the Xfinity app downloaded from the Apple App Store or Google Play or visit http://xfinity.com/activate and follow the prompts to activate.

   ISP contact information may change. You can also find this information on your monthly Internet service billing statement.

Note to CATV system Installer: This reminder is provided to call attention to Section 820-93 of the National Electrical Code, which provides guidelines for proper grounding. Specifically, it specifies that the coaxial cable shield shall be connected to the grounding system of the building, as close to the point of cable entry as practical.