Thanks, MerlinMan
DSS only has one red light next to each extension. Red on in supervisor mode means signed in. Off means signed out. This is working ok. Extensions spill over onto page 2 of DSS, but after the extensions of actual users end there is a break in "on lights", then there are 8 lights lit up in a row.
Thanks for confirming the ringing. Couldn't find anything but wanted to make sure.
calling group label would work if only they had display phones. Alas, these are MLX-10's not 10D's. It's like the stone age or at least 1992 when this system was installed. They have gotten their money out of it, though, and it's kind of amazing that the thing has lasted so long.
Cheers!