The OAS is a component of the Metasys system. In terms of the BACnet protocol, the OAS is BACnet Testing Laboratory (BTL) listed and certified to the BACnet Building Controller (B-BC) profile and to the BACnet Secure Connect Hub (B-SCHUB) profile.
The OAS can display data from and edit values across a network of BACnet devices. An operator views the data on a web browser that is logged on to the web-enabled user interface of an OAS.