PCI to 4 Ports RS232 Serial Card, 64 Bit, 2000 V ... switch, no jump line, easy setting by softwareSupports ISA and PCI busCompatible with 3.3 V / 5 V PCINo conflict between ... software flow controlDriver supports Windows/Linux/Unix series operating system PCI to 4 Ports RS232 Serial Card, 64 Bit, 2000 V ...