Issue link: https://www.e-digitaleditions.com/i/1132978
34 I ICT TODAY Video Surveillance Integration with video surveillance systems is generally expected. At one time, the access control system plat- form was the dominant software for central security equipment processing, event recording and database management. However, many systems today use the video surveillance platform for the operator interface and central processing. How the access control hardware is integrated with the video surveillance system has changed. It may no longer be necessary to install analog cabling from the door position switch to initiate recording of video. Today's IP-based surveillance systems can use motion or boundary line crossing to initiate recording and documentation of an occupant entering or an unau- thorized entry alarm. The access control and video surveillance systems can communicate over the network using structured cabling. Cameras with artificial intelligence are also currently being used in place of credential readers. Facial recog- nition software can authorize entry over the LAN. Magnetic Locks Magnetic locks are frequently used with ACS in existing construction. Some AHJs require two different request to exit devices when magnetic locks are used. The second request to exit may need to be pneumatic rather than electronic. Required testing should include verification of the length of time the door remains unlocked after activation of the request to exit for occupants having difficulty with code compliance and passing through the opening. The state or local AHJ may have require- ments for remote magnetic lock release controls and should be consulted. Many manufacturers offer an optional magnetic bond sensor. Specify whether the electromagnetic lock should send a notification when the holding force drops below a predetermined limit and who should be notified. Manufacturers will need to be consulted for testing of the magnetic bond sensor. Door Ajar Owners may want notification when a door is not closed after a prescribed period of time. The access control system needs to be tested to verify that a door ajar alarm is generated when the door position switch does not close. The door position switch also needs to be tested so that the amount of swing required to separate the door contacts is adequate. If the door position switch is too close to the hinge side, the door could be ajar but no alarm is generated. Latch Bolt Monitoring In high security areas, the door position switch may not be enough to indicate that a door is secure. A door could be closed but not locked. The access control system may include latch bolt monitor switches and strike monitor switches. Some latch bolt monitor switches are inside locks and others are inside electric strikes. From inside the lock, they monitor whether the latch is extended or depressed. When located in an electric strike, they monitor whether there is a latch bolt present in the keeper. Healthcare Healthcare ACS can be much more complex than those in some other projects. Infant abduction protection systems and supervised care elopement prevention systems, for example, may be combined on the same door with many other systems, thereby increasing the complexity of installation and commissioning. • At-Risk Human Perimeter Systems To keep babies from being removed without author- ization and to prevent individuals with memory difficulties from eloping, doors in high risk areas of healthcare facilities combine ACS with at-risk human perimeter systems. The access control system shall not allow the selected doors to open when an individual wearing a wrist band is in the area around the door. If delayed egress functionality is used to override a lock and opens a door or if the door is already open when an individual wearing a wrist band enters the area, a local alarm will sound and an alert is sent to the nurse call system and the facility security team. The exciters that trigger the inductive response in the at-risk human perimeter system wrist band commonly operate on frequencies similar to access