Stockholm City Schools — Sweden

Based on a framework agreement with the education department of the city of Stockholm, Nordic Alarm, a Hanwha Vision STEP Partner, had to deliver complete video surveillance systems for schools located throughout the city. Cameras needed to be installed at the entrances, corridors and other common areas of the schools, in order to deter and detect any criminal activity or anti-social behavior, such as bullying, vandalism and theft, and if necessary, provide high quality video evidence to police.

Over 600 Wisenet X cameras have been installed by Nordic Alarm across 20 Stockholm schools. Just three models from the extensive Wisenet range have been needed to meet the requirements for the specified camera location at each of the schools. These include XNV-6020R 2 megapixel and 5 megapixel XNV-8020R vandal-resistant domes. A large number of Wisenet XNF-8010R 360-degree fisheye cameras have also been installed. These provide a cost-effective way to monitor large open areas where a much larger number of standard cameras might normally be required, to avoid any blind spots. All three Wisenet models have built-in IR illumination which allows them to capture superb quality images regardless of the ambiance lighting conditions. They are also equipped with a wide range of intelligent video analytics including loitering detection and an audio analysis function which recognizes critical sounds such as screams and broken glass.

Depending on the number of cameras deployed at each school, the images captured by the cameras are recorded locally on either 32 channel Wisenet XRN-2011 or 64 channel Wisenet SRN-4000 Network Video Recorders (NVRs). Both devices have internal hot-swappable hard drives which support RAID5 recording. This provides protection against unrecoverable read errors, as well as whole HDD failure.

Although the Wisenet X cameras have built-in IP network technology, at each school they form part of a closed circuit video surveillance system which cannot be accessed from outside the school. This protects the privacy of students and complies with GDPR and the Camera Security Act. In this respect, recorded video is only stored via the school’s internal network and it is deleted after a limited period of time.