NETGEAR CM212 User manual
Introduction
Thank you for purchasing a NETGEAR CM212 Cable Modem. With this modem you can
have secure high-speed Internet access and, if you have an Cable/DSL Gateway Router, share
the modem with several computers.
This installation guide shows you how to connect the modem and configure it and your
computers for secure Internet access. Setup is easy – follow the instructions in this guide and
your system will be up and running quickly.
If you have problems, refer to the troubleshooting section on pages 13 and 14. There’s a short
glossary available on page 15 if you have questions about terminology.
Installation Overview
Estimated time: 15 to 30 minutes
1. Prepare for installation.
2. Connect the cable modem to one computer.
3. Configure that computer to work with the cable modem.
4. Test the connection.
CM212 Broadband Cable Modem
POWER
CABLE
STATUS
USB
ETHERNET
Broadband Cable Modem
1
What’s in the Box
When you open the box, verify that you received everything.
The package includes:
•NETGEAR CM212 Cable Modem
•AC power adapter
•Vertical stand
•Ethernet patch cable
•USB cable
•CM212 GearBox CD
•CM212 Installation Guide (this document)
•Warranty and registration card
•Support information card
CM212 Broadband Cable Modem
Model CM212 GearBox CD,
installation guide,support
information card &
warranty/registration card Category 5
Ethernet cable
Vertical Stand
POWER
CABLE
STATUS
USB
ETHERNET
BroadbandCable Modem
USB Cable
Power adapter
2
Prepare for Installation
Before installing the CM212 cable modem, you should have active (two-way) cable
service and an Internet account with your cable provider.
Note: If you’re connecting a single computer to the modem, you may use either the
modem’s USB or Ethernet port. If you’re connecting more than one computer, you
must use the Ethernet port combined with a Router.
USB Connection
If you’re connecting the modem to one computer using the USB port, you must have:
•Windows®98 Second Edition, Me, 2000, or XP.
•An available USB port in the computer.
•A USB cable.
Note: There is one USB cable in the box with the cable modem.
Ethernet Connection
If you’re connecting the modem to one or more computers, for each computer you must have:
•An available RJ-45 Ethernet port (or adapter) –either built-in or from a network
interface card (NIC) installed on the PC.
•TCP/IP networking installed.
•Windows®computers: Client for Microsoft®Networks software installed.
Note: TCP/IP and Client for Microsoft Networks is installed on most Windows
computers. Please see Windows Help if you need help installing either on a
Windows computer.
•A Category 5 (Cat 5) Ethernet patch cable.
Note: There is one cable in the box with the cable modem.
Additionally, if you want to connect more than one computer to the modem, you need:
•A Ethernet router, hub, or switch (for example, RP614 Cable/DSL Web Safe Router
Gateway).
Note: If using a hub or switch, you may need to get additional IP addresses from
your ISP.
1
1
3
Install the Cable Modem
After unpacking the box, you can install the cable modem. You do not have to power
down any equipment to do this, but if you need to move your computer (perhaps to get
to a port in the back), you may want to shut down the computer before moving it.
USB Connection
Use the USB cable if you’re connecting the modem to one Windows-based computer and you
have an available USB port on your computer.
1. Connect the CATV cable from the wall outlet to the Cable port on the modem.
2. Connect the USB cable to the USB port on the modem and to a USB port on the computer.
3. Connect the power adapter into the back of the modem and then plug the adapter into a
power source (such as a wall socket or power strip).
Once the Modem establishes a link with your service provider, the PC will automatically detect
the modem on the USB port.
The Power, Cable, Status, and USB lights on the modem should be lit. If any of the lights are
not lit, go to Troubleshooting on page 13.
Note: The modem must be connected to the Coaxial Cable and established link
(Cable and Status Lights are solid Green) before your PC will recognize the modem.
Proceed to Chapter 3 page 6 to install the USB drivers.
USBCABLE ETHERNET POWER
RESET
12VDC
1.0A-1.25A
CM212 Broadband
Cable Modem
2
2
4
Ethernet Connection
Use the Ethernet cable if you’re connecting the modem to one or more computers and you
have an available RJ-45 port on your computer.
1. Connect the CATV cable from the wall outlet to the Cable port on the modem.
2. Connect the Ethernet cable to the RJ-45 port on the computer and to the Ethernet port
on the modem.
3. Connect the power adapter into the back of the modem and then plug the adapter into a
power source (such as a wall socket or power strip).
4. If the computer was turned off, turn it on now.
The Power, Cable, Status, and Ethernet lights on the modem should be lit. If any of the lights
are not light, go to Troubleshooting on page 13.
Note: If you plan on sharing your cable Internet Service among multiple PCs, refer to
section 5 of this Guide.
USBCABLE ETHERNET POWER
RESET
12VDC
1.0A-1.25A
CM212 Broadband
Cable Modem
5
Configure the Computer to Work with
the Modem
Next, you configure the computer to interact with the modem.
USB Connection
Note: The modem must be connected to the Coaxial Cable and established link
(Cable and Status Lights are solid Green) before your PC will recognize the modem.
For the USB connection, you need to install USB drivers on your Windows computer.
1. If the computer was turned off, turn it on now.
2. Insert the CM212 GearBox CD in the computer’s CD-ROM drive.
3. Once the following dialog box appears click Next.
3
3
6
4. Select “Search for suitable drivers for my device”and click Next
5. Select CD-ROM Drives and click Next.
7
6. Click Next when the following dialog box appears.
7. Click Finish.
8
8. When the following dialog box appears, click Yes.
9. Restart the computer.
10. Proceed to Chapter 4 –Test the Connection on page 11.
Ethernet Connection
For the Ethernet connection, configure the TCP/IP settings on the computer and then restart
the computer. How you do this depends on your computer.
Windows Operating System
Normally, you leave the TCP/IP setup parameters at their factory default settings unless you
have a specific reason to change them. You should verify that the computer is set to ‘obtain an
IP address automatically’in the Network control panel.
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