3Com CMX User Manual

3

Com U.S. Robotics Cable Modem

Quick Installation Guide

What You Need to Install Your Cable Modem CMX

CMX

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• Cable modem

• Cable modem power supply

• RJ-45 network cable

• Rubber feet and stacking clips kit

• Cable Connections

• This Quick Installation Guide

• User’s Guide & Reference

PN 1.024.1970-00

Copyright  3Com Corporation. All rights reserved. 3Com and U.S. Robotics
are registered trademarks and Connections is a trademark of 3Com
Corporation. Windows is a registered trademark of Microsoft Corp.
Macintosh is a registered trademark of Apple Computer, Inc. Any other
trademarks, trade names, or service marks used in this manual are the
property of their respective owners.

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CD-ROM

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• A PC running Windows

running System 7.5 (or later) with TCP/IP protocol
installed (see the “Before You Begin” section in the
included User’s Guide & Reference for more information
about installing TCP/IP)

• An active two-way cable line

• An active Ethernet port or network interface card (NIC)

installed in your computer

• A 7/16 inch (or adjustable) wrench for securing the cable

line to the modem

• A screwdriver, pushpins, and screws (for optional wall-

mounting). The screw heads should be at least 0.2” (5mm)
in diameter for them to be properly captured in the slot. If
you are using wood screws, use #6 pan heads or
equivalent.

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95 (or later) or a Macintosh

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Hardware Installation

1.

Contact your local cable company.

in the room where your computer is located.

2.

Prepare your workspace.

the perforated card that is part of this Installation Guide. Otherwise, prepare to use your cable modem by performing the following
steps:

•

Position your computer near your cable outlet.

•

If you plan to install the modem on your desktop, attach the rubber feet to the bottom of the modem (see page 13 in the
User’s Guide & Reference for details).

•

If you plan to wall-mount the modem, you will need the mounting template included as the last page of this guide (see
page 11 in the User’s Guide & Reference for more information)

•

If you plan to stack the modem on top of 3Com OfficeConnect
your modem (see page 13 in the User’s Guide & Reference for more information)

•

Place the modem where it will be near your computer and the cable outlet, leaving plenty of room to guide the cables away
from the modem without crimping the cables.

•

The modem should have access to constant airflow.

•

Do not stack anything on top of the modem (see page 13 in the User’s Guide & Reference for information on stacking the
cable modem on top of 3Com OfficeConnect products).

•

The temperature where the cable modem will be located should be within 0 and 40°C (32 and 104°F). Relative humidity
should be between 5 and 95%, non-condensing.

3.

Verify your computer is set up for networking.

that networking support is installed. The cable modem requires your computer to have an RJ-45 Ethernet interface and TCP/IP
installed. See the “Before Your Begin” section in the User’s Guide & Reference for more information.

If you are planning to wall-mount your cable mod em, see page 11 in the User’s Guide & Reference or

They can help you establish a cable Internet access account and install a cable access outlet

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products, you will need the stacking clips included with

Windows users should install the TCP/IP protocol and Mac users should verify