You can easily extend SONARPLEX with Addons and Plugins. The differentiation between both lie in their scope.

• Plugins extend the SONARPLEX with check methods to monitor specific applications or devices, e.g. check_icmp_adv2 or check_radius_adv
• Addons extend the SONARPLEX with extra functionality, e.g. interfacing with video cameras (Video-Harvester, Camera Addon), exporting raw event and performance data (Data Exporter)

Both are generally referred to as extension and can be managed by either the or the SONARMANAGER