An integrated security system for managing the security of a premises, comprising: an access control system (22, A1, L2) for providing authorised access onto the premises, the access control system (22, A1, L2) providing a signal indicative of an unauthorised access; a video security system comprising visual means (20, C) for visually monitoring the premises, the visual means (20, C) being interconnected with the processing means; a burglar alarm system (16, 18, S1-S4) for determining whether an intrusion onto the premises has occurred, the burglar alarm system providing a signal indicative of an intrusion; processing means (14, 34, 52) interconnected with the access control system (22, A1, L2), the burglar alarm system (16, 18, S1-S4) and the visual means (20, C), and comprising control means for verifying an intrusion by intelligently looking at video signals provided by said visual means (20, C) to differentiate between human and non-human motion and detect an actual intrusion onto the premises; the processing means (14, 34, 52) further comprising a common database for storing information related to the operation and control of the burglar alarm system (16, 18, S1-S4), the access control system (22, A1, L2), and the video security system (20, C); and the integrated security system further comprising remote monitoring means; characterized in that the control means is adapted to determine whether a signal indicative of an intrusion has been received from the burglar alarm system (16, 18, S1- S4), and once received, to control operation of the visual means (20, C) to verify an intrusion and to provide a signal indicative of an actual Intrusion onto the premises; wherein said processing means (14, 34, 52) is further adapted, in response to the occurrence of the signal indicative of an actual intrusion onto the premises, to send a signal indicative of an intrusion onto the premises via a first communications channel to the remote monitoring means. an access control system (22, A1, L2) for providing authorised access onto the premises, the access control system (22, A1, L2) providing a signal indicative of an unauthorised access; a video security system comprising visual means (20, C) for visually monitoring the premises, the visual means (20, C) being interconnected with the processing means; a burglar alarm system (16, 18, S1-S4) for determining whether an intrusion onto the premises has occurred, the burglar alarm system providing a signal indicative of an intrusion; processing means (14, 34, 52) interconnected with the access control system (22, A1, L2), the burglar alarm system (16, 18, S1-S4) and the visual means (20, C), and comprising control means for verifying an intrusion by intelligently looking at video signals provided by said visual means (20, C) to differentiate between human and non-human motion and detect an actual intrusion onto the premises; the processing means (14, 34, 52) further comprising a common database for storing information related to the operation and control of the burglar alarm system (16, 18, S1-S4), the access control system (22, A1, L2), and the video security system (20, C); and the integrated security system further comprising remote monitoring means; characterized in that the control means is adapted to determine whether a signal indicative of an intrusion has been received from the burglar alarm system (16, 18, S1- S4), and once received, to control operation of the visual means (20, C) to verify an intrusion and to provide a signal indicative of an actual Intrusion onto the premises;