Customer is using a mcis using 7316e phones. They have 12 lines that appear and ring at all stations and they are constantly in use. There can be several different calls on hold at the same time. The problem is it very difficult to determine the line that was placed on hold from your station. The book says the line you placed on hold will blink faster but with several lines on hold it is very difficult to tell the difference, is there a way to change this?