Field Assistant is a standalone tool you can install on your computer or laptop to access a single or multiple OEMCtrl controllers. You do not need to be connected to the Internet. You can communicate with the devices using local access or over an IP network.
In Field Assistant, you can use local access to connect to a single controller or multiple controllers. You can also use IP to access an entire network of routers and controllers.
By design, Field Assistant will not work over third-party BACnet Routers. The reason an OEMCtrl router is required is to enforce the security permissions framework to protect the algorithmic intellectual property of the lighting panel manufacturer.