ONLY works on analog phones, not electronic system or VoIP phones.
Controlled by an AC outlet, use a lamp timer or smart outlet for automatic scheduling. When the AC power is turned on, the phone line will be made busy.
It simply turns off the phone line, so you can't make or receive calls, and incoming callers hear a busy signal.
Great for turning off a second or third line that hunts from the first line so you can use one answering machine, or turning off the phone line when you don't want to be disturbed.
If you want to manually make the line busy, use our Standard Make Busy Switch (#KIT7K) with push button toggle switch.