NETGEAR CM1000 User manual

350 East Plumeria Drive
San Jose, CA 95134
USA
September 2016
202-11665-02
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.

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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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Activate Your Internet Service With Comcast XFINITY . . . . . . . . . . . . . . . . . . 11
Perform a Speed Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Connect Your Cable Modem to a Router After Installation and Activation . . . 12
Chapter 2 Manage and Monitor
Log In to the Cable Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
View Cable Modem Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
View Cable Modem Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
View and Clear Event Logs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Change the admin Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Reboot the Cable Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Reset the Cable Modem to Factory Default Settings . . . . . . . . . . . . . . . . . . . . . 20
Use the Reset Button on the Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Use the Factory reset Software Button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Change the Cable Connection Starting Frequency . . . . . . . . . . . . . . . . . . . . . . . 22
Chapter 3 Troubleshooting
Use LEDs to Troubleshoot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Cannot Log In to the Cable Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Troubleshoot the Cable Internet Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
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.1The 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
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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
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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 • 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 25.
Downstream • Solid amber. One downstream channel is locked.
• Solid green. Two 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. Two 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 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 3. Product label

Hardware and Internet Setup
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High Speed Cable Modem
Back Panel
The back panel provides the connections and button shown the following figure.
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
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High Speed Cable Modem
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.
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 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 install your cable modem and connect it directly to a computer:
1. Turn off 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 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.

Hardware and Internet Setup
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High Speed Cable Modem
Note: If Comcast XFINITY is your cable Internet provider, Comcast XFINITY
recommends connecting your cable modem directly to a cable wall outlet.
3. 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.
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 on page 10.

Hardware and Internet Setup
10
High Speed Cable Modem
Activate Your Internet Service
To activate your Internet service:
1. Visit your cable Internet provider’s website and follow the onscreen instructions to
activate your Internet service.
Cable Internet Provider Contact 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.
Comcast XFINITY http://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 11.
Cox https://activation.cox.net/selfactivation/newmodem.cox
1-888-556-1193
Mediacom https://maestro.mediacomcc.com/walledgarden/page/login.jsp
1-844-2SIMPLE (1-844-274-6753)
Time Warner Cable https://www.timewarnercable.com/en/support/internet/step-by-step/modem-acti
vation.html
1-800-892-2253
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 CM1000, 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.
Note: When you attempt to contact Cablevision online, you are directed to the
Optimum web page. Optimum is a brand name of Cablevision.