Thanks for the replies, guys. The reason for my question is that we've been seeing a lot of enquiries for BACNet with our HMIs, so we've gone ahead and added support for BACNet over RS485 (the so-called MS/TP transport) and over Ethernet using IEEE 802.3 frames to our G3 panels and our Data Station Plus. (We're working on BACNet/IP and we'll have that as soon as we can figure out how to get the bloody kit we're working with configured!) But we're not sure about the LonWorks transport, which can also be used to carry BACNet frames. We've had some questions about it, but supporting it would mean an expansion card to handle the hardware side, which is obviously more of a commitment than software, which, as we all know, is free (joke)...