Indicator light on Alcatel 4039 Flashing orange

no problem it's just a missed call indicator... press it and on the display screen it will say missed internal or external call, press the button adjacent to that and it will display the caller id of the missed call... again press the adjacent button and you will be presented with the option to delete the missed call... as soon as you have the orange light will stop flashing. On a 4019 the sequence is Orange button, 5 times up arrow until the identity of the missed caller is displayed ok, ok again to delete and then back arrow 4 times... hope this helps :-)