The LEDs on the modem router light to indicate modem router
activity:
Power LED
Downstream LED
Upstream LED
Internet LED
2.4 GHz WiFi LED
5 GHz WiFi LED
Ethernet LED
WiFi On/O button and LED
WPS button and LED
2
LEDDescription
Power• Solid green. Power is supplied to the modem router.
• O. No power is supplied to the modem router.
• Solid red. Thermal cuto mode. Power o the unit, let it
cool, and move it away from heat sources (such as a TV,
DVD player, or speakers) and keep it vertical in open air.
Downstream• Solid amber. One downstream channel is locked.
• Solid green. Two or more downstream channels are
locked.
• Blinking green. The modem router is scanning for a
downstream channel.
• O. No downstream channel is locked.
Upstream• Solid amber. One upstream channel is locked.
• Solid green. Two or more upstream channels are locked.
• Blinking green. The modem router is scanning for an
upstream channel.
• O. No upstream channel is locked.
Internet• Solid green. The modem router is online.
• Blinking green. The modem router is synchronizing with
the cable provider’s cable modem termination system
(CMTS).
• Slow blinking amber and green. The modem router
reached the trac meter limit. (For information about the
trac meter, see the modem router’s user manual.)
• O. The modem router is oine.
2.4 GHz WiFi• Solid green. The 2.4 GHz radio is on.
• O. The 2.4 GHz radio is o.
5 GHz WiFi• Solid green. The 5 GHz radio is on.
• O. The 5 GHz radio is o.
Ethernet• Solid green. A device is connected to an Ethernet port
and powered on. Ethernet port LEDs for each port are
located on the rear panel.
• O. No device is connected to an Ethernet port.
3
LEDDescription
WiFi On/O
button with LED
Pressing this button for two seconds turns the WiFi radios
in the modem router on and o. If this LED is lit, the WiFi
radios are on. If this LED is o, the WiFi radios are turned o
and you cannot use WiFi to connect to the modem router.
WPS button with
LED
This button lets you use WPS to join the WiFi network
without typing the WiFi password. The WPS LED blinks
during this process and then lights solid.
Install Your Modem Router
¾ To install your modem router:
1. Connect a coaxial cable.
Use a coaxial cable that is provided by your cable company to
connect the cable port on the modem router to a cable wall
outlet or a line splitter.
Note: For Xfinity cable Internet service, Comcast Xfinity recommends
connecting your modem router to a cable wall outlet.
2. Connect the power adapter to the modem router and plug the
power adapter into an electrical outlet.
4
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