This is (surprise) an Emulex CS11. It emulates a DH11 async multiplexer, with some bells and whistles like modem control if you use the right cab kit. The magic for this series of Emulex cards is in the cab kit, as there's a fair amount of logic that lives there. Do you have the cab kit? -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927