Ukrainian-made STOP-Net access control system with the ability to work with many access points. The STOP-Net version 4.0 system is implemented on the platform of the integrated security system (ISB). The peculiarity of the STOP-Net ACS is the balance between cost and functionality, reliability and resistance to emergency situations, a well-thought-out architecture that allows installers to flexibly approach the preparation of a solution for a specific object. This section also presents STOP-Net version 3.5 hardware for expanding existing installed systems.