Here's a quick explanation of the different colors of the Call Control Home LED light right and what they mean.

Blue - The unit is connected and operating normally at idle.

Yellow / Pulsing Yellow - The unit is booting up.

Flashing Blue and Yellow - The unit is ready to be connected to WiFi, or if previously connected to WiFi, indicates that the WiFi connection has been lost and you should check the Call Control Home app for details.

Flashing Blue - The firmware is being updated, please don't disconnect the power.

Red - There's an incoming call that is being blocked.

Green - There's an incoming call that is not being blocked.

Light Green - Indicated that you are on an active call.

Flashing Yellow - Indicates an error condition.