The easily installed CallSaver2000 Automatically hangs up your phone line when your telephone is accidentally left off the hook allowing all other telephones in your home or office to operate normally. The CallSaver2000 has a built in ringer that rings when someone calls taking the place of the telephone's ringer that is left off hook. You can use one CallSaver2000 on the main line to protect all the phones in your home or office or you can use one CallSaver2000 unit on the trouble spot phone. (See Figures below for installation on single or multiple phones)  The CallSaver2000 will save lives for people who rely on the telephone for Medic Alerts, Burglar Alarms, etc. (if you have a phone off the hook, Medic Alerts, and Burglar Alarm Systems are useless) All 3 Versions are available in attractive Blister-Pak or Compact Box. The CallSaver2000  for home or business use (not the PBX Systems Ver. or the Overseas Ver.) is available for  $59.95 ea. plus $6.95 S&H (See the picture of the attractive CallSaver2000 and blister pack below).