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User Guide - Page 3
... jack available, and you 'll need to a "live" coax cable. Sometimes a cable will already be available. Your modem can also share a coax cable attached to the jack with a coax cable. Now connect your cable service provider. Connecting to a Coax Cable
On the next panel you connect to a TV by using a coax splitter...
User Guide - Page 4
... connect to a WiFi router see If You Want to a computer. COAX Connect a "live" coax cable to use the supplied wrench. You may want to the modem's COAX connector as discussed above. (Tighten the nut so it's finger tight.
User Guide - Page 5
... need that 's plugged into the MB7621's Ethernet port. If you're asked for the online connection light ( ) to www.motorola.com . Many service providers including Comcast and Cox prefer that you activate by calling them. Activate
For some service providers, you activate by first opening the Web browser of the modem. This should bring you to 15...
User Guide - Page 6
... connect this may take 30 minutes or longer to complete.
Here is a list of phone numbers for whatever's plugged into your MB7621 service. For Comcast XFINITY Users Only: If the activation page does not appear, please go to xfinity.com/activate for more information and to activate your cable modem is NOT working, see Troubleshooting Tips below.
User Guide - Page 7
... (computers, smartphones, tablets, video devices, game stations...) share your router's instructions for the ONLINE light ( ) to the MB7621. If You Want to Connect a Router
Most users will connect a WiFi router to be solidly lit.
4.
Follow your cable modem's Internet connection, either wirelessly or through a direct Ethernet connection. Wait for setting up the router.
User Guide - Page 8
MB7621 Lights
LIGHT
COLOR
DESCRIPTION
Power Downstream
Upstream Online
Green
ON: OFF:
Cable modem power on Cable modem power off
Green or Blue
Green or Blue
Green
Green
...to know so they can adjust their network.
8 You should still get high Internet speeds, but your service provider may want to go online
Green: Online
OFF:
Offline
LAN
Green
Blinking: Ethernet data is flowing ...
User Guide - Page 9
You can 't make an Internet connection right after installation?
• First turn your cable modem off for at least 8 seconds, then on, to see if that fixes the problem.
• If the modem's lights don't come on, check that the modem is getting Internet service but my speed is live outlet, and that the Ethernet cable is connected...
User Guide - Page 10
... to see whether your home's cabling is , check Comcast XFINITY's Internet Minimum System Recommendations here: https://www.xfinity.com/support/internet/requirementsto-run-xfinity-internet-service/
• If you get good speed when a computer's plugged into the modem, you have the speed problem at least 1000 MHz.
• Make sure your service provider. You can also find information about...
User Guide - Page 11
...-753-0562
Limited Warranty
MTRLC LLC warrants this product against defects in material and workmanship for a warranty period of 2 years. Please visit our support Website or call our support specialists. To read the full warranty, please go to help. Our Website has our Motorola Mentor information, and also provides returns and warranty information.
User Guide - Page 12
...modem should normally be in an environment that may not cause harmful interference, and (2) this is a
shock hazard. The cable modem should not be installed indoors. and are trademarks or registered trademarks of Motorola...device in water, since this device must comply with Class B Part 15 of the FCC Rules. MOTOROLA and the Stylized M Logo are used with FCC emissions limits....
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