A wide range of communication tasks have to be performed in and around commercial buildings. OGNIOS develops complete solutions to meet all requirements in this area. They encompass all transit areas: Entrances or exits at car parks, building access, emergency call systems in lifts, access to offices or areas with high security standards. Communication units inside and outside the rooms can be individually combined and adapted entirely as required. Access control of visitors and employees can also be adapted to specific security standards. The extension of the system with a mobile unit promises exceptional flexibility. This allows access to be controlled from anywhere via a smartphone or tablet PC with the full functionality of an intercom system.