20-08-11 is unchecked. I will try checking that, thanks.

Can any give a little explanation of how to work System Options.

So System options are under 20-XX.
Each extension giving a Class of Service Number which is assigned in 20-06? Here there is 8 Night Modes? Is this correct? I'm thinking I am checking and unchecking options in 20-07 through 20-14 and maybe its not doing anything because only setting the CoS for Night Mode?

Any explanation of the process of assigning phones to CoS and such would be much appreciated. Thanks.