This is an ACPO recommendation. It is very similar to Alarm Abort. The main difference is that, to utilise Alarm Abort, you have to designate a channel on your communicator. With Restore, the message is sent on the same channel as your alarm signal. When the system is un-set a Restore signal is sent, to the monitoring station, which will clear the channel. This does rely on the monitoring station being able to take this type of signal. Installation companies will either use Restore or Alarm Abort but not both on the same system.