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!

Check those buttons at the phones and see what they are programmed for.
Just press program, press the button, (co 8 or 9)
and see what it shows.
You will need a display set.
MrG

i have them programmed for icm 107 and icm 118.on all 10 phones but even if I unplug at the ksu it remains the same. I have not unprogrammed each extension yet...

Are those extensions programmed to ring on incoming calls? It sounds as though you're getting the DSS appearance and ringing indication, even though they are unplugged.

What kevhawk13 said. John C.