FAQ:

Does the BACnet-N2 Router support COV subscription?

With version 1.3 of the S4 Open: BACnet-N2 Router we support both confirmed and unconfirmed COV subscriptions and associated notification.

In addition, we have added a Transparent Caching service to the BACnet-N2 router to disconnect the BACnet protocol from dependence on direct access to the N2 bus. The BACnet-N2 Router responds to BACnet requests from its cache resulting in almost immediate response.