Comtrol Rocketport Infinity 4 Or 8 Port Multiport Serial Adapter - Universal Pci - 8 X Db-9 Male Rs-232/422/485 Serial - Plug-in Card This RocketPort INFINITY card delivers up to 8-ports of additional in-server serial connectivity via a four or eight-port external interface that is purchased separately. Data communication of 460Kbps is connected through RS-232/422/485 software-selectable ports. The serial adapter card is a low profile design suitable for use in both standard servers and 2U rackmount servers. Product is fully compatible with systems that have 32 or 64 bit 3.3 volt PCI and PCI-X expansion slots. The INFINITY design utilizes the Comtrol Unity ASIC technology that takes full advantage of the 66 MHz BUS speed available on PCI-X servers.