Netgear Cm600 High Speed Cable Modem User Manual

							350 East Plumeria Drive
San Jose, CA 95134 
USANovember 2015
202-11576-01
High Speed Cable Modem
Model CM600
User Manual 
						

							 
2 High Speed Cable Modem 
Support
Thank you for purchasing this NETGEAR product. You can visit www.netgear.com/support to register your product, get help, access the latest downloads and user manuals, and join our community. We recommend that you use only official NETGEAR 
support resources.
Conformity
For the current EU Declaration of Conformity, visit http://kb.netgear.com/app/answers/detail/a_id/11621.
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. 
						

							3
Contents
Chapter 1 Hardware and Internet Setup
Unpack Your Cable Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Product Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  6
Back Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Install and Activate Your Cable Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
Connect Your Cable Modem to a Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
Activate Your Internet Service  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9
Activate Your Internet Service with Comcast XFINITY . . . . . . . . . . . . . . . . . .  10
Perform a Speed Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
Connect Your Cable Modem to a Router After Installation and Activation  . . .  12
Chapter 2 Manage and Monitor
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 
						

							4
1
1.   Hardware and Internet Setup
The NETGEAR High Speed Cable Modem provides a connection to high-speed cable Internet 
with speeds up to 960 Mbps.1 The cable modem is certified by all major cable Internet 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
•Product Label
•Back Panel
•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. Maximum rate is derived from DOCSIS 3.0 specifications and actual throughput varies depending on your Internet subscription with your provider. 
						

							Hardware and Internet Setup 5
 High Speed Cable Modem
Unpack Your Cable Modem
Your package contains the following items.
Ethernet cable
Power adapter
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
Figure 2. Cable modem front view 
						

							Hardware and Internet Setup 6
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  
LEDIconDescription
Power
•  Green. Power is supplied to the cable modem.
•  Off. No power is supplied to the cable modem.
•  Red. 
The cable modem is too warm and might overheat. For more information 
about this condition, see  Use LEDs to Troubleshoot on page  24.
Downstream
•  Solid amber . One downstream channel is locked.
•  Solid green . T
 wo or more downstream channels are locked.
•  Blinking green . The 
 cable modem is scanning for a downstream channel.
•  Off. No downstream channel is locked. 
Upstream
•  Solid amber . One upstream channel is locked.
•  Solid green . T
 wo or more upstream channels are locked.
•  Blinking green . 
 The cable modem is scanning for an upstream channel.
•  Off. No upstream channel is locked.
Internet
•  Solid green . The cable modem is online.
•  Blinking green . 
 The cable modem is synchronizing with the cable Internet 
provider’s cable modem termination system (CMTS).
•  Off. The 
 cable modem is offline.
Ethernet
•  Green. A powered-on device is connected to the Ethernet port at 1000 Mbps.
•  Amber . 
 A powered-on device is connected to the Ethernet port at 10/100 Mbps.
•  Blinking green or amber . The 
 Ethernet port is processing traffic.
•  Off. No device is connected to the Ethernet port.
Product Label
The product label on the side of the cable modem displays the serial num\
ber 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 3. Product label 
						

							Hardware and Internet Setup 7
 High Speed Cable Modem
Back Panel
The back panel provides the connections and button shown the following f\
igure.
Power adapter input LAN Gigabit Ethernet port
Coaxial cable connector Reset button
Power On/Off button
Figure 4. Cable modem back panel 
						

							Hardware and Internet Setup 8
High Speed Cable Modem 
Install and Activate Your Cable Modem
The cable modem provides a connection between your cable Internet provid\
er’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
  12).
Computer 
Cable modem
Coaxial cable to
Ethernet
cable
Power adapter cable outlet
Figure 5. Connect the cable modem directly to a computer
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 ca\
ble 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.
2.  T
urn off the computer to which you intend to connect the cable modem. 
						

							Hardware and Internet Setup 9
 High Speed Cable Modem
3. 
Use the Ethernet cable provided in the package to connect the Gigabit Et\
hernet 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 n\
etwork. During 
this time, the LED behavior is as follows:
•The Downstream LED lights amber when one downstream channel is locked.
• The Downstream LED lights green 
 when more than one downstream channel is 
locked.
• The Upstream LED lights amber when one upstream channel is locked.
• The Upstream LED lights green 
 when more than one upstream channel is 
locked.
• After the cable modem  registers with your cable Internet provider
 , the Internet LED 
lights green 
. 
Even though an Internet connection is established, Internet service is a\
vailable only after you 
set it up with your cable Internet provider
 .
For information about how to activate your Internet service, see Activate Your Internet 
Service  on page
  9.
Activate Your Internet Service
To activate your Internet service:
1.  V
isit your cable Internet provider’s website and follow the onscreen instructions to 
activate your Internet service.
Cable Internet ProviderContact Information
Bright House Networks http://support.brighthouse.com
1-866-898-9101
Cablevision http://www.cablevision.com
https://install.optimum.com/JointInstall/
Telephone number depends on your region.
Note: When you attempt to contact Cablevision online, you are directed to the \
Optimum web page. Optimum is a brand name of Cablevision. 
						

							Hardware and Internet Setup 
10 High Speed Cable Modem 
Note:Your cable Internet provider’s contact information might change. You 
can also find the contact information in your monthly Internet service 
billing statement.
2. If you are unable to activate your Internet service using the instructions on your cable 
Internet provider’s website, call your cable Internet provider and do the following:
a.When asked, provide your account information and provide the cable modem’s model 
number, which is CM600, serial number, and MAC address.
The serial number and MAC address are on the label on the cable modem, which is 
on the bottom of the cable modem.
b. Wait for your cable Internet provider to confirm that your cable modem is active.
c. If you do not get an Internet connection with the cable modem, ask your cable 
Internet provider to look for your cable modem online, and do one of the following 
depending what your cable Internet provider tells you about your cable modem:
•If the cable modem is not visible, your cable Internet provider can give you 
instructions to verify why the cable modem does not connect with your high-speed 
Internet service.
•If the cable modem is visible to your cable Internet provider, reboot the cable 
modem. Check your online status again.
Activate Your Internet Service with Comcast XFINITY
If you use Comcast XFINITY, you can set up Internet service by using Comcast XFINITY’s 
self-activation process. If you are unable to self-activate your cable modem, call Comcast 
XFINITY customer service. After you complete the setup, perform a speed test.
Comcast XFINITYhttp://www.comcast.com/activate
http://www.XFINITY.com/internetsetup
http://www.XFINITY.com/internetsupport
1-800-XFINITY (1-800-934-6489)
For more information, see Activate Your Internet Service with Comcast 
XFINITY on page 10.
Coxhttps://activation.cox.net/selfactivation/start.cox
1-888-556-1193
Mediacomhttps://maestro.mediacomcc.com/walledgarden/page/login.jsp
1-844-2SIMPLE (1-844-274-6753)
Time Warner Cablehttps://elb02.activatemymodem.com/authentication
1-800-892-2253
Cable Internet ProviderContact Information