When you have the display of 7, 8, or 9 your connection is good. There are other things that can give you a less than stellar experience.
While the number 9 is the largest distance between your Coverage Unit and your Network Unit you can have the systems slightly too far apart. This may cause you to experience intermittent interference which can cause the connection to break.
**Network Unit (NU) is also known as the Window Unit (WU).**