Have a 2000 IPS. Using Zeacom for queing and agents. Right now Day/Night mode is programmed by time schedules. If I program a day/night mode key on phone or use feature code will it override the time schedule and put the system in night mode. Only want to use the button to put system in night mode for unscheduled needs, like fire drills, meetings, etc. but leave the schedule in use daily.