Have not seen a DCS before that with NO CID features on would light up red on an incoming call then sometimes drop before ringing in again and even then, the first appearance is still red. Only 1 station currently set to ring in 500 but even when additional stations are added the first ring ALWAYS lights red. Am planning to build a new ring group tomorrow and see if that clears.Thought I would post to see if anyone else has ever seen this. I will update of my findings tomorrow.