NETGEAR CM500 User Manual
CM500 High Speed Cable Modem
User Manual
May 2015
202-11534-01
350 East Plumeria Drive
San Jose, CA 95134
USA
CM500 High Speed Cable Modem
Support
Thank you for selecting NETGEAR products.
After installing your device, locate the serial number on the label of your product and use it to register your product at
https://my.netgear.com. You must register your product before you can use NETGEAR telephone support. NETGEAR
recommends registering your product through the NETGEAR website.
For product updates and web support, visit http://support.netgear.com.
Phone (US & Canada only): 1-888-NETGEAR.
Phone (Other Countries): Check the list of phone numbers at http://support.netgear.com/general/contact/default.aspx.
Compliance
For regulatory compliance information, visit http://www.netgear.com/about/regulatory.
See the regulatory compliance document before connecting the power supply.
Trademarks
© NETGEAR, Inc., NETGEAR and the NETGEAR Logo are trademarks of NETGEAR, Inc. Any non-NETGEAR trademarks are
used for reference purposes only.
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Contents
Chapter 1 Hardware and Internet Setup
Chapter 2 Manage and Monitor
Unpack Your Cable Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Back Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Product Label. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Install and Activate Your Cable Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Connect Your Cable Modem to a Computer. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Contact Your Cable Internet Provider and Set Up Your Internet Service. . . . 9
Set Up Your Internet Service with Comcast Xfinity. . . . . . . . . . . . . . . . . . . . . 10
Perform a Speed Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Connect Your Cable Modem to a Router After Installation and Activation . . . 11
Log In to the Cable Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
View Cable Modem Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
View Cable Modem Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
View and Clear Event Logs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Change the admin Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Reboot the Cable Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Reset the Cable Modem to Factory Default Settings . . . . . . . . . . . . . . . . . . . . . 19
Use the Reset Button on the Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Use the Factory Reset Software Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Change the Cable Connection Starting Frequency . . . . . . . . . . . . . . . . . . . . . . . 21
Chapter 3 Troubleshooting
Use LEDs to Troubleshoot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Cannot Log In to the Cable Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Troubleshoot the Cable Internet Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Appendix A Technical Specifications
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1. Hardware and Internet Setup
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The NETGEAR CM500 High Speed Cable Modem provides a connection to high-speed cable
Internet with speeds up to 680 Mbps.
providers. A Gigabit Ethernet port provides fast access and downloads. The cable modem
supports the assignment of IPv4 and IPv6 addresses by cable Internet providers.
This chapter covers the following topics:
• Unpack Your Cable Modem
• Front Panel
• Back Panel
• Product Label
• Install and Activate Your Cable Modem
• Connect Your Cable Modem to a Router After Installation and Activation
Note: For more information about the topics covered in this manual, visit the
support website at http://support.netgear.com.
1
The cable modem is certified by all major cable Internet
1. Maximum rate is derived from DOCSIS 3.0 specifications and actual throughput varies depending on your Internet subscription with your provider.
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CM500 High Speed Cable Modem
Unpack Your Cable Modem
Your package contains the following items.
Ethernet cable
Cable modem
Figure 1. Package contents
Front Panel
The cable modem provides status LEDs on the front.
Power LED
Downstream LED
Upstream LED
Internet LED
Ethernet LED
Power adapter
Figure 2. Cable modem front view
Hardware and Internet Setup
5
CM500 High Speed Cable Modem
You can use the LEDs to verify status and connections. The following table lists and
describes each LED on the front panel of the cable modem.
Table 1. LED descriptions
LED Icon Description
Power
Downstream
Upstream
Internet
Ethernet
• Green. Power is supplied to the cable modem.
• Off. No power is supplied to the cable modem.
• Red.
• Solid amber. One downstream channel is locked.
• Blinking amber. The
• Solid green. More than one downstream channel is locked.
• Off. No downstream channel is locked.
• Solid amber. One upstream channel is locked.
• Blinking amber.
• Solid green. More than one upstream channel is locked.
• Off. No upstream channel is locked.
• Solid green. The cable modem is online.
• Blinking green.
• Off. The
• Green. A powered-on device is connected to the Ethernet port at 1000 Mbps.
• Amber.
• Blinking green or amber. The
• Off. No device is connected to the Ethernet port.
The cable modem is too warm and might overheat. For more information
about this condition, see Use LEDs to Troubleshoot on page 24.
cable modem is scanning for a downstream channel.
The cable modem is scanning for an upstream channel.
The cable modem is synchronizing with the cable Internet
provider’s cable modem termination system (CMTS).
cable modem is offline.
A powered-on device is connected to the Ethernet port at 10/100 Mbps.
Ethernet port is processing traffic.
Back Panel
The back panel provides the connections and button shown the following figure.
Power adapter input
LAN Gigabit Ethernet port
Reset button
Coaxial cable connector
Figure 3. Cable modem back panel
Hardware and Internet Setup
6
CM500 High Speed Cable Modem
Product Label
The product label on the bottom of the cable modem displays the serial number and MAC
address of the cable modem and login information, including the default IP address, default
user name, and default password.
MAC address
Serial number
Figure 4. Product label
Install and Activate Your Cable Modem
The cable modem provides a connection between your cable Internet provider’s network and
your computer, router, or WiFi router.
Connect Your Cable Modem to a Computer
During the installation and activation, you must connect the cable modem directly to a
computer. After installation and activation, you can connect the cable modem to a router (see
Connect Your Cable Modem to a Router After Installation and Activation on page 11).
Power adapter
Ethernet
cable
Coaxial cable to cable outlet
Cable modem
Figure 5. Connect the cable modem directly to a computer
Hardware and Internet Setup
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Computer
CM500 High Speed Cable Modem
Note: Before you connect your cable modem and contact your cable Internet
provider, collect your cable account number, account phone number,
and login information (your email address or user name and password).
To connect your cable modem directly to a computer:
1. Connect a coaxial cable.
Use the coaxial cable that your cable company provided 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.
urn off the computer to which you intend to connect the cable modem.
2. T
3. Use the Ethernet cable provided in the package to connect the Gigabit Ethernet port on the
cable modem to an Ethernet port on the computer
4. T
urn on the computer.
.
5. Connect the power adapter provided in the package to the cable modem and plug the power
adapter into an electrical outlet.
When the startup procedure is completed, the Power LED lights green
6. W
ait for the cable modem to come online.
.
It takes at least 10 minutes for the cable modem to come online on the network. During
this time, the LED behavior is as follows:
• The Downstream LED lights amber
• The Downstream LED lights green
when one downstream channel is locked.
when more than one downstream channel is
locked.
• The Upstream LED lights amber
• The Upstream LED lights green
• After the cable modem registers with your cable Internet provider
lights green
.
when one upstream channel is locked.
when more than one upstream channel is locked.
, the Internet LED
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 Contact Your Cable Internet
Provider and Set Up Your Internet Service on page 9.
Hardware and Internet Setup
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