Motorola SURFboard SB6121 Troubleshooting guide
SURFboard®SB6121
DOCSIS®3.0 Cable Modem
Quick Startup Guide
Please visit www.motorola.com/us/support for FAQs and additional product documentation.
BEFORE RETURNING THIS PRODUCT TO THE STORE for any reason, please call Motorola Broadband Technical Support:
1-877-466-8646
IMPORTANT
1. Power ON your computer. Check that the Receive, Send, and
Online LEDs on your modem turn ON (not flashing). See next
page for more LED information.
Note: If all three LEDs did not turn ON, contact your service
provider.
2. Open a web browser of your choice, such as Internet Explorer,
Firefox, or Google Chrome.
3. Type any valid URL (for example, www.motorola.com) in the
address bar to test your network connection.
- If the web page opens, your modem was set up properly.
- If the web page does not open, you may have to contact your
current service provider to set up your Internet service or
activate your modem.
Please contact your service provider, if you do not already have
a cable service installed or you do not currently subscribe to a
high-speed cable service.
You may need to provide your modem’s MAC address and
serial number (see next page for details).
Before starting, make sure your cable service is up and running,
and that the coaxial cable is already connected to your home’s
cable outlet. If not, contact your service provider.
1Connect the other end of the coaxial cable to the Cable
connector on the rear panel of your modem.
2Plug in the power cord to an electrical outlet and to the Power
port on the rear panel of your modem. This will automatically
power ON your modem.
3 Connect the Ethernet cable to the Ethernet port on your
computer (or other device) and to the Ethernet port on the rear
panel of your modem.
ConnectingYour Modem
(see connection diagram)
Items Included in the Box
• SB6121 Cable Modem
• Power Supply
• Ethernet Cable
• Software License & Warranty Card
• Quick Startup Guide
StartingYour Modem
MOTOROLA and the Stylized M Logo are trademarks or registered trademarks of Motorola Trademark Holdings, LLC. SURFboard is a registered trademark of Motorola Mobility, Inc. All other product or service
names are the property of their respective owners. No part of the contents of this document may be reproduced or transmitted in any form or by any means without the written permission of the publisher.
© 2011 Motorola Mobility, Inc. All rights reserved.
582928-001-b 08/2011
SURFboard®SB6121
DOCSIS®3.0 Cable Modem
Front Panel LEDs
ICON LED STATUS
Green (ON): Indicates power to the modem is properly connected
Green (ON): Indicates a downstream (receive data) channel
connection
Blue* (ON): Indicates a bonded downstream (receive data) channel
connection
Green (ON): Indicates an upstream (send data) channel connection
Blue* (ON): Indicates a bonded upstream (send data) channel
connection
Green (ON): Indicates Internet connectivity
Amber (ON): Indicates a device, computer, or router is connected
to the Ethernet port and is operating in Ethernet (10Base-T) or Fast
Ethernet (100Base-T) mode
Blue* (ON): Indicates a device, computer, or router is connected to
the Ethernet port and is operating in high-speed Gigabit Ethernet
(1000Base-T) mode
*High-speed data service may not be available in your location. Check with your
service provider for more information.
Modem Label
During normal operation, the
POWER, RECEIVE, SEND, and
ONLINE LEDs should always
be ON. The LINK LED should
FLASH during data transfer.
Note: During startup, all LEDs
will FLASH and then turn ON
in sequence. If an LED turns
ON and the next LED does not
FLASH, please contact your
service provider.
Please note: The SB6121 modem
label is located on the bottom of
your modem. It contains specific
ID information for your modem.
To receive cable service, your
service provider may request
the Media Access Control (MAC)
address (see HFC MAC ID) and
serial number (see S/N) located
on the modem label.
Product Operation
Quick Startup Guide
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