Oh yeah I almost forgot.

The solution to the 3100 range not working?

Change the range to 3300..........

Luckily it was only 10 extensions/blast groups to change.

Works like it should now, and we never did find the reason the 31## numbers would not dial.

Though I have not dug into the phones themselves to see if 31# is some sort of shortcut combo. I will investigate that after things settle down.