It is such a sad story that PBX vendors pretty much just want to move boxes, and their suppliers are pretty much the same. So there is no tech support at the development level when you are coding to an API like TAPI, no one knows anything about a published feature of their device. On top of that, they keep you from getting to the people who could answer your question in 5 minutes if you could just get to them, the manufacturing team. Somewhere exists a human or a team of humans who developed the TAPI TSP for Avaya. IF anyone can gve me a phone number, email, front line screening person wo can get me to them if I am worthy, etc, please let me know. Thanks!