SIIG Add-On Card Model JJ-P45012-S7 Type: PCI to Serial Port Card External Ports: 2 x Serial Ports Internal Ports: 2 x Serial Ports Specifications: Chip: Oxford OXuPCI954 Bus type: 32-bit PCI Port type: Four 9-pin RS232 serial ports IRQ sharing reduces IRQ conflicts Built-in 32-byte FIFO buffers dramatically increase data transmit/receive speed, especially under Windows multitasking environment 4-layer PCB board: separate layers for data & grounding. Greatly reduces signal noise & loss. Delivers more reliable high-speed data transfers Enhanced bracket design to prevent bending. Connected to PCB with washered screws for a more secure connection Supports 3.3V operation with 5V tolerance Conforms to PCI v2.2 universal card standard. PCI-X & 64-bit compatible Supports PME (Power Management Event). Allows device to request a change in system power state (wake up system) ...