The LonMark Association exists to help enable the easy integration of multi-vendor systems based on LonWorks networks.

Where once end-users were locked into lengthy and costly service and upgrade agreements from a single vendor, they can now implement control systems using LonMark devices from multiple vendors picking and choosing devices that best suit their needs knowing they can be easily integrated.

Please visit the web site for more information --- http://www.lonmark.org/

Why does it seem so difficult to get the manufacture's SNVT's from them?