hi guys ,I just finished installing a 200+ ipo 500v2 system with 9600's and 1600's phones .the problem I have is on some of the users line appearance button ,after a call , it stays lit (green) hence you cant make a call ,but if u call the number it would ring and u can answer and when you hang up only then it would clear and go back to normal. I'm using analogue trunks .is there an issue with the phone or the trunk settings?