I did not notice anything in the screenshot you posted about bay 7. Open jumpers in a wiring closet will cause cause your same trouble. External busy is exactly what it says, all external trunks are busy for whatever reason whether busied out or actually someone on them. Trunks 1, 2, 3, and 8 looked ok according to your screenshot but they could have been busy and you can see that in the same way you looked before thru Reports etc., actually you can see exactly who is talking on them also.