Call Curfew blocks all incoming (and outgoing) calls during certain times of the day. You set the schedule, and then the only calls that get through during those hours are ones you've authorized.
You can include up to 20 numbers on your "authorized callers list." Callers who are not on your list hear: Your call has been completed. However, the party you are calling is not receiving calls at this time.
To manage this feature, dial from the line it's installed on, or call 1-888-(your area code)-8052 from any touch-tone phone.**
For detailed, printer-friendly instructions, download the Call Curfew user guide [pdf].