Only some models are equipped with the Wlan WAN/WiMAX function.
The Wlan WAN/WiMAX indicator glows red when the Wlan WAN/WiMAX function are turned on.
In some models the indicator will glow and blink in order to indicate the connection status.
But if the Wlan WAN/WiMAX functionality is not available, the indicator would stay OFF.
As far as I know this notebook supports an Atheros 802.11(b/g/n)WB195-HMCWlan card with BT functionality but WAN/WiMAX is not supported.