ONLY works on analog phones, not electronic system or VoIP phones.
Great for turning off your ringers at night or any time you don't want to be disturbed.
Use it to stop your Fax Line from ringing your phones (but you can still make outbound calls), or to prevent guests from knowing your phone is ringing.
If you want to turn off the ringers automatically on a certain schedule, use our Automatic Ringer Cut-Off Switch (#MIS9F) with an AC Outlet Timer or Smart Outlet.