The Advantech PCI-1603-BE is a 2-port RS-232 PCI Comm. Card with Interface Modules. It is a PCI-based board that supports two standard RS-232 serial ports. The board is powered by a 5V PCI bus and allows two full-duplex serial ports to be connected to a PC. It has an onboard controller, an on-chip microprocessor, and advanced on-board electronic circuitry and software. The board supports bi-directional data transfer rates of up to 115,200 Kbps and comes with a software switch-setting utility that can configure port settings, baud rate, and data/stop bits. It also has an IRQ sharing function. The board supports various operating systems, including Windows, DOS, Linux and FreeBSD.