Netgear CMD31T Installation Guide - Page 2

Troubleshooting, Technical Support - cable modem

Page 2 highlights

LEDs Power • Solid green: Power is on. • Off: Power is off. Online (Cable Link) • Green blinking: The cable modem is on-line and processing traffic. • Off: The cable modem is off line. US (Upstream) • 1/2 solid amber: Upstream Channel 1 is in use. • 1/2 solid green: Upstream Channels 1 and 2 are in use. • 3/4 solid amber: Upstream Channels 1, 2, and 3 are in use. • 3/4 solid green: Upstream Channels 1, 2, 3, and 4 are in use. • Off: No upstream channel is in use. DS (Downstream) • 1/2 solid amber: Downstream Channel 1 is in use. • 1/2 solid green: Downstream Channels 1 and 2 are in use. • 3/4 solid amber: Downstream Channels 1, 2, and 3 are in use. • 3/4 solid green: Downstream Channels 1, 2, 3, and 4 are in use. • Off: No downstream channel is in use. Ethernet • Solid green: A 1 Gbps device is connected and detected on the Ethernet port. • Solid Amber: A 100 Mbps device is connected and detected on the Ethernet port. • Solid Red: A 10 Mbps device is connected and detected on the Ethernet port. • Blinking: There is data traffic on the Ethernet port. • Off: No device is detected on the Ethernet port. September 2011 Troubleshooting No LEDs are lit on the cable modem Online LED does not light up Ethernet LED does not light up even though a device is attached You cannot connect to the Internet The cable modem has no power. Make sure that: • The power adapter is correctly connected to the cable modem. • The power adapter is correctly connected to a functioning power outlet. If it is to a power strip, make sure the power strip is turned on. • You are using the correct power adapter. There is a hardware connection problem, or you do not have cable service. Do the following: • Make sure the cable connector is securely plugged in at the cable modem. • Turn the power to the cable modem off and on. • You might not have active cable service yet. Contact your provider to verify activation. There is a hardware connection problem. Do the following: • Make sure the cable connector is securely plugged in to the cable modem and the computer. • If you are not using the cable included with the cable modem, check that the Ethernet cable is a straight-through patch cable. It can take up to 15 minutes to establish a connection the first time you power on your cable modem. Always leave your cable modem plugged in to AC power and connected to the cable system. Do the following: • Check your cable connections. Connectors should be finger tight. • Make sure that you have powered up in the following sequence: - Turn on your cable modem first, and wait until the LEDs stop flashing. - If your computer is connected to the cable modem, turn on the computer. • If you have a home network, check the TCP/IP configuration. - For Windows, the network properties should be set to obtain an IP address automatically. - For Macintosh computers, the TCP/IP (or Network) control panel should be set to Using DHCP Server. Technical Support Thank you for selecting NETGEAR products. After installing your device, locate the serial number on the label of your product and use it to register your product at www.netgear.com/register. Registration is required before you can use the telephone support service. Registration through the NETGEAR website is strongly recommended. Go to support.netgear.com for product updates and web support. NETGEAR technical support: 1-888-638-4327, for US and Canada only. For complete DoC please visit the NETGEAR EU Declarations of Conformity website at: support.netgear.com/app/answers/detail/a_id/11621/. For GNU General Public License (GPL) related information, go to support.netgear.com/app/answers/detail/a_id/2649. WARNING!! DO not stack equipment, or place equipment in tight spaces or in drawers. Be sure your equipment is surrounded by at least 2 inches of air space. This symbol was placed in accordance with the European Union Directive 2002/96 on the Waste Electrical and Electronic Equipment (the WEEE Directive). If disposed of within the European Union, this product should be treated and recycled in accordance with the laws of your jurisdiction implementing the WEEE Directive. ©2011 by NETGEAR, Inc. All rights reserved. NETGEAR and the NETGEAR logo are registered trademarks of NETGEAR, Inc. in the United States and/or other countries. Other brand and product names are trademarks or registered trademarks of their respective holders. Information is subject to change without notice.

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September 2011
This symbol was placed in accordance with the European Union Directive 2002/96 on the Waste
Electrical and Electronic Equipment (the WEEE Directive). If disposed of within the European Union,
this product should be treated and recycled in accordance with the laws of your jurisdiction
implementing the WEEE Directive.
©2011 by NETGEAR, Inc. All rights reserved. NETGEAR and the NETGEAR logo are registered trademarks of
NETGEAR, Inc. in the United States and/or other countries. Other brand and product names are trademarks or
registered trademarks of their respective holders. Information is subject to change without notice.
LEDs
Power
Solid green
: Power is on.
Off
: Power is off.
Online
(Cable Link)
Green blinking
: The cable modem is on-line and processing
traffic.
Off
: The cable modem is off line.
US (Upstream)
1/2 solid amber
: Upstream Channel 1 is in use.
1/2 solid green
: Upstream Channels 1 and 2 are in use.
3/4 solid amber
: Upstream Channels 1, 2, and 3 are in use.
3/4 solid green
: Upstream Channels 1, 2, 3, and 4 are in use.
Off
: No upstream channel is in use.
DS (Downstream)
1/2 solid amber
: Downstream Channel 1 is in use.
1/2 solid green
: Downstream Channels 1 and 2 are in use.
3/4 solid amber
: Downstream Channels 1, 2, and 3 are in use.
3/4 solid green
: Downstream Channels 1, 2, 3, and 4 are in use.
Off
: No downstream channel is in use.
Ethernet
Solid green
: A 1 Gbps device is connected and detected on the
Ethernet port.
Solid Amber
: A 100 Mbps device is connected and detected on
the Ethernet port.
Solid Red
: A 10 Mbps device is connected and detected on the
Ethernet port.
Blinking
: There is data traffic on the Ethernet port.
Off
: No device is detected on the Ethernet port.
Troubleshooting
No LEDs are lit
on the cable
modem
The cable modem has no power. Make sure that:
The power adapter is correctly connected to the cable modem.
The power adapter is correctly connected to a functioning power
outlet. If it is to a power strip, make sure the power strip is turned on.
You are using the correct power adapter.
Online LED
does not light
up
There is a hardware connection problem, or you do not have cable
service. Do the following:
Make sure the cable connector is securely plugged in at the cable
modem.
Turn the power to the cable modem off and on.
You might not have active cable service yet. Contact your provider to
verify activation.
Ethernet LED
does not light
up even though
a device is
attached
There is a hardware connection problem. Do the following:
Make sure the cable connector is securely plugged in to the cable
modem and the computer.
If you are not using the cable included with the cable modem, check
that the Ethernet cable is a straight-through patch cable.
You cannot
connect to the
Internet
It can take up to 15 minutes to establish a connection the first time you
power on your cable modem. Always leave your cable modem plugged
in to AC power and connected to the cable system. Do the following:
Check your cable connections. Connectors should be finger tight.
Make sure that you have powered up in the following sequence:
- Turn on your cable modem first, and wait until the LEDs stop
flashing.
- If your computer is connected to the cable modem, turn on the
computer.
If you have a home network, check the TCP/IP configuration.
- For Windows, the network properties should be set to obtain an IP
address automatically.
- For Macintosh computers, the TCP/IP (or Network) control panel
should be set to Using DHCP Server.
Technical Support
Thank you for selecting NETGEAR products.
After installing your device, locate the serial number on the label of your product and
use it to register your product at
www.netgear.com/register.
Registration is required
before you can use the telephone support service. Registration through the
NETGEAR website is strongly recommended.
Go to
support.netgear.com
for product updates and web support
.
NETGEAR technical support: 1-888-638-4327, for US and Canada only.
For complete DoC please visit the NETGEAR EU Declarations of Conformity
website at:
support.netgear.com/app/answers/detail/a_id/11621/
.
For GNU General Public License (GPL) related information, go to
support.netgear.com/app/answers/detail/a_id/2649
.
WARNING!!
DO
not
stack equipment, or place equipment in tight spaces or in drawers. Be
sure your equipment is surrounded by at least 2 inches of air space.