This light is often labeled as online cable sync or signal and usually has a symbol. The power ds and us lights should become solidly on.

Answered How To Self Installing And Activating Your Wireless
Xfinity modem online light blinking. Similar to routers most modems both cable and dsl have a light dedicated to the broadband connection. It may take up to seven minutes to restart your xfinity internet router or modem. If you are having xfinity internet connection problems troubleshoot your connection with these step by step solutions. If the modems online light continues to blink for over 45 minutes after the power ds and us lights are solidly on this indicates that there is no internet connection. If the light is off youll need to reset the xfinity voice modem. It is an xfinity gateway router which we got when we signed up for our xfinity internet package.
The company has been around for more than 50 years and has the second largest cable network in the world. Unplug or cut off the power supply from your xfinity wifi router. When the light is stable it means that the connection is established and the internet access is granted. Re initializing the internet modem. If the light is flashing very slowly please chat with us. Here is the solution provided to help get rid of the blinking light issue.
However quite recently a lot of reports have been coming in where users are unable to connect to the internet and the usds light on their routers is blinking. However when the light is blinking it means the connection isnt being established properly. After the modem is connected to the cable and powered up the modems lights will blink. Power cycling your defected or dysfunctional device is essential. Generally the internet line from outside is connected to your modem or router through a splitter. See reset your modem for xfinity internet or xfinity voice for instructions.
Xfinity for full functionality of this site it is necessary to enable javascript. A flashing light indicates a phone is off the hook. As stated in the title the 24 and 5ghz lights are blinking intermittently with the 24 ghz light blinking about every second. To re initialize your modem or router follow these steps. Check if the xfinity internet connectivity usds light blinking issue is resolved or it still persists.
Gallery of Xfinity Modem Online Light Blinking

