Hey guys, I just heard about that project and just saw that the supply of AXXIUM USP is based on few facts. After a few minutes of investigation I found a manual that might be interesting for this purpose as it includes a full DB-9 pinout for the Axxium rackmount USP. You can get it here: lit.powerware.com/ll_download.asp?file=m_axxiumrack_user_jun99.pdf Beste wishes, F. Giewald