Rich, this excerpt from UniFax manual page 24 may help you with your current problem with the JT9600 fax board: "A long outstanding bug in the Hayes/Quadram JT9600 board interfers with any use of 16bit DMA. This means the Hayes card cannot be used in systems which have other cards that use it. For example the Adaptec 1540/1542 SCSI hard disk controller." -Robert Lin