NETGEAR CM400 Manuel utilisateur

Quick Start

High Speed Cable Modem

Model CM400

Package Contents

Cable modem

Ethernet cable Power adapter

Coaxial cable

(not included)

Power adapter

Cable modem

Ethernet cable

Attachable feet

5. Wait for the Online LED to light green.

This process might take up to 10 minutes.

Note: When the Online LED lights, your cable

modem is not connected to the Internet yet.

You must activate your cable modem with your

Internet service provider.

6. Connect your computer to the cable modem.

Use an Ethernet cable to connect a computer to

the Etherent port on the cable modem.

Reboot the computer

1. Collect your cable Internet provider

information.

Collect your cable account number, account

phone number, and login information (your email

address or user name and password).

2. Turn o and disconnect 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.

3. Connect a coaxial cable.

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, Xﬁnity recommends connecting your

cable modem directly to a cable wall outlet.

4. Connect the power adapter.

Connect the power adapter to the cable modem

and plug the power adapter into an electrical

outlet.

7. Activate your Internet service.

For information about how to activate your

Internet service, see Activate Your Internet

Service.

Note: Aer you install and activate the

cable modem you can disconnect the computer

and connect a router to the cable modem. For

more information see Connect a Router.

Computer

February 2018

NETGEAR, Inc.

350 East Plumeria Drive

San Jose, CA 95134, USA

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 ocial NETGEAR support resources.

If you are experiencing trouble installing your cable modem, contact NETGEAR

at 1-866-874-8924. If you are experiencing trouble connecting your router,

contact the router manufacturer.

For regulatory compliance information, visit

http://www.netgear.com/about/regulatory/.

See the regulatory compliance document before connecting the power supply.

Customer-owned cable modems might not be compatible with certain

cable networks. Check with your cable Internet provider to conﬁrm that this

NETGEAR cable modem is allowed on your cable network.

Activate Your Internet Service

Before you start the self-activation process, collect the following

information:

• Your Internet service provider (ISP) account information

• Cable modem model number, which is CM400

• Cable modem serial number

• Cable modem MAC address

Your cable modem’s serial number and MAC address are on the cable

modem label. The following table lists contact information for ISPs that

support your cable modem.

Cable Internet

Provider

Contact Information

CableOne http://www.cableone.net/

1-877-MY-CABLE (1-877-692-2253)

Cox https://www.cox.com/activate

1-888-556-1193

Mediacom https://maestro.mediacomcc.com/walledgarden/page/login.jsp

1-855-Mediacom (1-855-633-4226)

Optimum https://install.optimum.com/JointInstall/

1-877-810-6750

Spectrum https://activate.spectrum.net/

1-(833) 267-6094

Xﬁnity https://register.xﬁnity.com/

https://www.xﬁnity.com/support/internet/activate-

purchased-modem/

1-800-XFINITY (1-800-934-6489)

Note: Your ISP’s contact information might change. You can also ﬁnd the

contact information in your monthly Internet service billing statement.

¾To activate your Internet service:

1. Visit your ISP’s website and follow the onscreen instructions to activate

your Internet service.

2. To determine the accurate Internet speed, visit your ISP’s speed test

website or and perform a speed test.

Connect a Router

Aer you install the cable modem and activate your Internet service, you

can disconnect the computer and connect a router to the cable modem.

¾To connect a router to the cable modem:

1. Reboot the cable modem by unplugging the power cable from the

cable modem and plugging it back in.

Wait for the Online LED to stop blinking and light solid green.

2. Use an Ethernet cable to connect the Ethernet port on the

cable modem to the WAN or Internet port on the router.

3. Power on the router.

4. Wait until the router is ready.

5. Connect a computer to the router.

For more information about how to set up your router, see the

documentation that came with your router.

Cable modem

Router

Computer

trademarks are used for reference purposes only.

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