They indicate your connection is up and healthy. Go to your xfinity my account smartphone app.

What Do The Lights On A Vodafone Router Mean The Big Tech
Internet light blinking on router. Replace if the cable lan port and wire are damage. Once it gets connected the light will stop blinking. The led light indicates that your router is connected to the isps network. In most cases flashing lights on your router are a good thing. Log in to your comcast account. My router internet activity light blinks 5sec along with my cable modem activity light even with all computers turned off.
Once a network connection is established between router and isp its time to receive and send data over the adsl. I have a wireless g broadband router wrk54g. When you switch on the router the adsl light will blink that indicated it is trying to find and connect to the isp network. Just because your computers may be off or your router unplugged doesnt mean that. Have a check for the service interruption. The send light on a cable modem indicates your uplink status.
The blinking lights on a router are talking to you cnet the blinking lights on a router are talking to you a little up front research can prepare you for internet access failures and other. When the send light is solid there is a solid uplink connection between you and your isp. Im a novice user thought the light should stay steady. Most routers have a single light dedicated solely to the status of the internet connection. However if the situation persists for long follow these troubleshooting steps to help get your connection established properly. Click on check for the link of service.
They are both always blinking as if the router is constantly sending things out to the internet. However this is not always the case. If it is continually blinking without ever going solid in most cases it means there is an outage in your area. Loose wire connection between modem to the router may cause the flashing orange light problem on your netgear router. Unplug all the wire connection of modem and router. Now reconnect modem straight to the internet port named wan on the router.
Just set it up noticed the internet light blinks rapidly all the time. The color of the adsl light is generally amber. This light is often labeled as internet wan or marked with a symbol of globe or a satellite flying.