Netgear CM500 - High Speed Cable Modem—DOCSIS 3.0 Installation Guide

Quick Start

Model CM500

Connect the power adapter to the 
cable modem and plug the power adapter 
into an electrical outlet.
When the startup procedure is completed, 
the Power LED 

 lights green. 

Even though an Internet connection is established, Internet 
service is available only after you set it up with your cable 
Internet provider. For information about how to set up your 
Internet service, see the other side of this quick start guide.

Note: 

If Comcast Xfinity is your cable Internet provider, 

set up your Internet service by using the following Xfinity 

self‑activation process:
a.  Close all web browsers and then launch a web browser. 

You are redirected to the Xfinity self‑activation page. If 

you are not redirected to the Xfinity self‑activation page, 

visit the following website:  

b.  Provide your Xfinity credentials during the activation 

process.
If you are unable to self‑activate your cable modem, call 
Comcast Xfinity customer service at  
1‑800‑XFINITY (1‑800‑934‑6489).

The cable modem comes online when the 
Internet LED 

 stops blinking and lights 

solid green.
This process might take up to 10 minutes.

Use the Ethernet cable that is provided in 
the package to connect a computer to the 
Ethernet port on the cable modem.
Reboot the computer.

Note: 

After you install and activate the 

cable modem, you can disconnect the 

computer and connect a router to the 

cable modem. For more information, see 

Use a coaxial cable that is provided by 

your cable company to connect the cable 

port on the cable modem to a cable wall 

outlet or a line splitter.

Make sure that the cable is tightly connected.

Note: 

If Comcast Xfinity is your 

cable Internet provider, Comcast 

Xfinity recommends connecting your 

cable modem directly to a cable wall 

outlet.

Collect your cable account number, 
account phone number, and login 
information (your email address or user 
name and password).