Netgear Cm1000 Ultra High Speed Cable Modem Docsis 3 1 Ready User Manual

							350 East Plumeria Drive
San Jose, CA 95134 
USASeptember 2016
202-11620-02
High Speed Cable Modem
Model CM1000
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
Install Your Cable Modem and Connect It to a Computer. . . . . . . . . . . . . . . . .  8
Activate Your Internet Service With Comcast XFINITY . . . . . . . . . . . . . . . . . . .  9
Perform a Speed Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
Connect Your Cable Modem to a Router After Installation and Activation  . . .  10
Chapter 2 Manage and Monitor
Log In to the Cable Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
View Cable Modem Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
View Cable Modem Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
View and Clear Event Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  15
Change the admin Password  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  16
Reboot the Cable Modem  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  17
Reset the Cable Modem to Factory Default Settings  . . . . . . . . . . . . . . . . . . . . .  18
Use the Reset Button on the Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  18
Use the Factory reset Software Button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  19
Change the Cable Connection Starting Frequency  . . . . . . . . . . . . . . . . . . . . . . .  20
Chapter 3 Troubleshooting
Use LEDs to Troubleshoot  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
Cannot Log In to the Cable Modem  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
Troubleshoot the Cable Internet Connection  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
Appendix A Technical Specifications 
						

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1
1.   Hardware and Internet Setup
The NETGEAR High Speed Cable Modem provides a connection to high-speed cable Internet 
with speeds up to 1 Gbps.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 support.netgear.com.
1. Maximum rate is derived from DOCSIS 3.1/DOCSIS 3.0 specifications, limited by Ethernet port 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  23.
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. 
Install Your Cable Modem and Connect It 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
  10).
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 install your cable modem and connect it directly to a computer:
1. T
urn off existing modems and routers.
If you are replacing a modem that is currently connected in your home, u\
nplug the 
modem and plug the new cable modem into the same outlet.
2.  Connect a coaxial cable.
Use the coaxial cable that is provided by Comcast XFINITY to connect the\
 cable port on 
the cable modem to a cable wall outlet. Make sure that the cable is tigh\
tly connected.
3.  Connect the power adapter provided in the package to the cable modem and\
 plug the power 
adapter into an electrical outlet. 
						

							Hardware and Internet Setup 
9  High Speed Cable Modem
When the startup procedure is completed, the Power LED lights green.
4. Wait 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 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. 
5. Turn off the computer to which you intend to connect the cable modem.
6. Use the Ethernet cable provided in the package to connect the LAN port on the cable 
modem to an Ethernet port on the computer.
7. Turn on the computer.
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 activate your Internet service, see Activate Your Internet 
Service With Comcast XFINITY on page 9.
Activate Your Internet Service With Comcast XFINITY
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.
Before you start the self-activation process, make sure to collect your account number, 
account phone number, and login information (your email address or user name and 
password).
To activate your Internet connection with Comcast XFINITY’s self-activation process:
1. Close all web browsers.
2. 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 
comcast.com/activate.
3. Provide your XFINITY credentials and complete the self-activation process.
This process might take up to 15 minutes, during which the cable modem reboots a few 
times. 
						

							Hardware and Internet Setup 10
High Speed Cable Modem 
4. 
If you are unable to activate your cable modem using the XFINITY self-ac\
tivation process, 
call Comcast XFINITY customer service at 1-800-XFINITY (1-800-934-6489)\
.
a. When asked, provide your account information and provide the cable modem\
’
 s model 
number and MAC address, which are on the product label on the cable mode\
m. 
For more information, see Product Label on page  6.
b.  W
ait for Comcast XFINITY to confirm that your cable modem is active.
c. If you do not get an Internet connection with the cable modem, ask Comca\
st 
XFINITY to look for your cable modem online, and do one of the following\
 depending 
on what Comcast XFINITY tells you about your cable modem:
• If the cable modem is not visible, Comcast XFINITY can give you instruct\
ions to 
verify why the cable modem does not connect with your high-speed Interne\
t 
service.
• If the cable modem is visible to Comcast XFINITY
 , reboot the cable modem. 
Check your online status again.
Perform a Speed Test
To determine the Internet speed, visit the  speedtest.xfinity.com/ and perform a speed test.
If your actual speed is lower than your subscribed speed, contact Comcas\
t XFINITY.
Connect Your Cable Modem to a Router After Installation 
and Activation
After you install the cable modem and activate your Internet service, yo\
u can disconnect the  computer and connect a router to the cable modem.
Router 
Cable modem
Coaxial cable to
Ethernet cable
Power adapter
Computer
   cable outlet
Figure 6. Connect the cable modem to a router