I have done a complete shutdown and cold boot of the system each time I change the time control programming. The 4 incoming CO lines ring directly to the UCD group. There are some other lines that ring directly to appearances on the various phones. Only the UCD lines should look at the time control. The primary (VM 550)RAN gives the usual "we're sorry all lines are busy please stay on the line or dial 1 for more options" message. Dialing a 1 takes you to a secondary RAN (551) with more keystroke options.

If you inadvertently lock your wife and your dog in the trunk of your car for three hours, your dog will still be happy to see you when you get back.