Bt home hub 4 and 5. But if its off or red in color then its time to check to make sure that the network cable that connects the routers wan internet port often on the back of the router to the modem is plugged.

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How to fix red light on router. If the dsl modem keeps giving red dsl light signal it means there is a problem with the modem. A red light means there is a problem somewhere. You should verify the ip gateway address of your modem. A red led indicates that your eero doesnt have an internet connection or that your internet service is down. Simply turn off the device and unplug it from the power source. Red light is the sign that the dsl modem is unable to detect centurylinks internet equipment although you have to connect the line.
Try restarting and if it doesnt turn blue call bt. Check that your gateway eero is connected correctly to your modem and that your internet service is working. If the red light is for internet connection you need to contact your isp and have them fix the issue with your internet as your router is not being able to connect to the internet. Power cycling your modemrouter is the first step that needs to be taken when you are trying to troubleshoot the issue. Try restarting and if it doesnt turn blue call bt. If the led light is red on all your eeros check our troubleshooting tips here.
Change the routers ip address if your belkin access point continues showing the solid red light. The first thing to do is remaining calm and waiting for about 30 seconds. You need to check which of the red light is on and need to fix that. Power cycle your modemrouter. Leave it off for at least one minute. If it has the ip address beginning with the 192168xx.
Centurylink dsl light red pressing the reset button should be used only to restore the modem to its default settings including your wireless settings network name or ssid and the network key or passphrase for example.