![]() A crossover cable will give a green Ethernet light, but prevents surf. Note: If you are using an Ethernet (RJ-45) cable not provided by AT&T, make sure it is a straight-through cable and not a crossover cable. I have a red alarm light on my Fiber not box in my garage and not sure why Everything seems to be working fine, Fiber internet and u verse tv. If already enabled, disable the NIC and re-enable. Go to Device Manager to make sure the NIC is enabled.If the cable is defective, contact Technical Support for a new RJ-45 patch cable. Make sure the cable isn't a crossover type cable. If another Ethernet (RJ-45) cable is available, swap out cables to make sure yours isn't defective.Unplugged all the cords and plugged them back in. ![]() And the light labeled alarm will glow red. Verify you're using the provided yellow Ethernet cable and check the connections to the computer's Network Interface Card (NIC)/Ethernet port and the Ethernet port on the back of the Motorola modem. Every hour or so my internet will drop and stop working for about 5 minutes.If your Ethernet light doesn't light up, try the following: No inbound Internet traffic or modem is off. Is this something to do with the fiber cable itself Is there anything. Modem is attempting to connect to the Internet. The alarm light is red on the ONT and the light for PON is off. Modem is not connected to the Internet or modem is off. Contact Technical Support.įlashing Red Simultaneously with Ethernet Status Light Traffic between connected device and modem.įlashing Green Simultaneously with DSL Status Light No Ethernet connectivity or modem is off.Ī device is connected by Ethernet to the modem. There is an acceptable limit of that light, if it falls below that threshold that red light will turn on. Power on/self-test failed or modem has malfunctioned. Power is off or modem is not getting power. The following chart explains what each status light means.
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