I am having a problem with my outside lines disconnecting after the number is dialed. The call just disappears and there is no ring. I have tested all lines and they all ring and answer fine incoming. Sprint is our local telco provider, and I had a similar problem on our old Definity system. The CO is really close to our office. I have adjusted the "disconnect clear" down to 100ms and I still have the problem. By the way, these are loop start lines w/caller id. Anyone had a similar problem.