just replaced an old panasonic EASA wih an 824 configured 3 x16 and programmed other buttons to be speed dials for extensions. however buttons marked co 8 and 9 light up when incoming call rings on line 1 or 2. ( 3 is not in use, but left it active for posible future use.. I have them prorgammed to be icm 108 and 117 and it occurs even if I unplug the jacks on the ksu.

thanks!