System and method for automatically disarming an intrusion detection system

A system for automatically disarming an intrusion detection system that is configured to protect a premises and is switchable between an armed state of operation and a disarmed state of operation, the system comprising:

• an intrusion detection system state of operation ascertainer operable, responsive to receiving an indication of an intrusion to the premises, for ascertaining whether the intrusion detection system of the premises is in the armed state of operation;
• a registered mobile communicator proximity detector operable, responsive to (A) the indication of the intrusion to the premises and (B) the intrusion detection system being in the armed state of operation, for ascertaining whether at least one mobile communicator that is registered with the registered mobile communicator proximity detector is in a vicinity of the premises;
• and
• an automatic intrusion detection system disarmer operable, responsive to (A) the indication of the intrusion to the premises, (B) the intrusion detection system being in the armed state of operation, and (C) the at least one mobile communicator being in the vicinity of the premises, for disarming the intrusion detection system by switching the intrusion detection system from the armed state of operation to the disarmed state of operation.