This product is a PCI Express bus-supported board designed for extending RS-232C compatible serial communication functionality on your PC. The product has four RS-232C-standard serial ports. With a 128byte built-in FIFO buffer for transmission and reception of each channel, the product supports a baud rate of up to 921,600bps. Up to 16 boards can be mounted on a single PC and the range COM1 - COM256 can be set. Windows / Linux compatible driver software is available that can be used just like a COM port on a PC. This product supports CONTEC-defined driver library “APIPAC(W32)” that provide local routines.