A method comprising: receiving an indication of detection of an intrusion to a premises; responsive to receiving said indication, ascertaining whether an intrusion detection system protecting said premises is in an armed state of operation; responsive to ascertaining that said intrusion detection system is in said armed state of operation, ascertaining whether at least one registered mobile communicator, that is registered with the intrusion detection system, is in a vicinity of said premises; responsive to ascertaining that said at least one registered mobile communicator is in said vicinity of said premises, automatically disarming said intrusion detection system by: establishing a Bluetooth Low Energy, BLE, connection with said at least one registered mobile communicator; communicating, to said at least one registered mobile communicator, over said BLE connection, an indication that said intrusion detection system is in said armed state of operation; receiving, from said at least one registered mobile communicator responsive to said indication that said intrusion detection system is in said armed state of operation, over said connection, an instruction to disarm said intrusion detection system; and responsive to receiving, from said at least one registered mobile communicator, said instruction to disarm said intrusion detection system, forwarding, to said intrusion detection system, over a powerG protocol, said instruction to disarm said intrusion detection system; responsive to ascertaining that no registered mobile communicator is in said vicinity of said premises: generating an alarm indication; and communicating the alarm indication to an operator of said intrusion detection system. receiving an indication of detection of an intrusion to a premises; responsive to receiving said indication, ascertaining whether an intrusion detection system protecting said premises is in an armed state of operation; responsive to ascertaining that said intrusion detection system is in said armed state of operation, ascertaining whether at least one registered mobile communicator, that is registered with the intrusion detection system, is in a vicinity of said premises; responsive to ascertaining that said at least one registered mobile communicator is in said vicinity of said premises, automatically disarming said intrusion detection system by: establishing a Bluetooth Low Energy, BLE, connection with said at least one registered mobile communicator; communicating, to said at least one registered mobile communicator, over said BLE connection, an indication that said intrusion detection system is in said armed state of operation; receiving, from said at least one registered mobile communicator responsive to said indication that said intrusion detection system is in said armed state of operation, over said connection, an instruction to disarm said intrusion detection system; and responsive to receiving, from said at least one registered mobile communicator, said instruction to disarm said intrusion detection system, forwarding, to said intrusion detection system, over a powerG protocol, said instruction to disarm said intrusion detection system; establishing a Bluetooth Low Energy, BLE, connection with said at least one registered mobile communicator; communicating, to said at least one registered mobile communicator, over said BLE connection, an indication that said intrusion detection system is in said armed state of operation; receiving, from said at least one registered mobile communicator responsive to said indication that said intrusion detection system is in said armed state of operation, over said connection, an instruction to disarm said intrusion detection system; and responsive to receiving, from said at least one registered mobile communicator, said instruction to disarm said intrusion detection system, forwarding, to said intrusion detection system, over a powerG protocol, said instruction to disarm said intrusion detection system; responsive to ascertaining that no registered mobile communicator is in said vicinity of said premises: generating an alarm indication; and communicating the alarm indication to an operator of said intrusion detection system. generating an alarm indication; and communicating the alarm indication to an operator of said intrusion detection system.