If the vehicle has exceeded the recommended mileage for service of the gear or differential oil it is highly recommended to have it changed, as old oil may not provide the same level of protection as clean, fresh oil.
LonWorks is an open protocol technology, which means that the network architecture is based on a single protocol-LonTalk. LonTalk is what every LonWorks device has in common, regardless of manufacturer, device type, processor, or communication media.
Most building automation networks consist of a primary and secondary bus which connect high-level controllers with lower-level controllers, input/output devices and a user interface devices. ASHRAE's open protocol BACnet or the open protocol LonTalk specify how most such devices interoperate.