This product is an interface board based on the PCI bus that provides serial communications based on the external device and RS-232C.Compatible with Low Profile size slot and replaced with attached brackets to support standard size slots.Each piece has 8 channels serial ports.By using the attached standard COM driver software [COM Setup Disk], you can access it as a standard Windows or Linux COM port. ● Compatible with high -speed communication with a maximum of 921,600bps.Up to 16 boards can be added, and setting up from COM1 -COM256 is possible. ● Can be used as a standard COM port for Windows and Linux with attached driver software ● Supports Low Profile Size Slot, Standard Size Slot (replaced with an attached bracket) ● Equipped with 8 channels of RS-232C-compliant serial port ● Send 128Byte Reception 128Byte FIFO buffer is installed on each channel ● Bow rates of each channel can be set individually by software.- [Extended module] Bus specification PCI Size Low Profile Used connector 1x 0.8mm pitch 68-pin (female) [Serial communication] Number of channels 8X RS-232C [asynchronous] Transmission speed 2-921,600bps Insulation - Transmission method RS-232C [asynchronous]