P588U card is eight RS232 serial port card.
Cabling / Connectors
Generally you can have R804 cable to work with this UPCI card to support eight DB9 male connector. Or you can use R801 cable to support eight DB25 male connector.
For people need to support RS422 or RS485 interface to replace RS232 interface. They can use P8485U card to support eight RS422/RS485 serial ports in one card. Or they can use R803 cable to connect with RS4232-8 box. Then they can have eight ground isolated RS422/RS485 interface.
For SCO Openserver UNIX user P588U card is one of the cheapest way to add extra eight TTY device connection.
For DOS and WIN95/98/Me/2000/NT/XP/2003 user P588U card is one of the cheapest way to add extra eight COM serial port.
For Linux user P588U card can support RedHat , Slackware, Suse new 2.6.x kernel system.
There are two alternatives for using P588U on Linux systems without installing the supplied Rayon driver. Both methods use Linux standard tty driver (which is normally limited to 4 ports only):
1. Modify /boot/grub/menu.lst to add one more boot parameter: 8250.nr_uarts=16
2. Linux systems can have for example ttyS4--ttyS11 on OPe958 card. "dmesg" will show the actual configuration for this card (depending on additional tty ports on the system).
1. In /usr/src/linux the kernel sourcecodes can be found . Please run "make menuconfig" to modify the configuration.
2. Device Drivers----> Character devices -----> Serial driver -----> Number of 8250/16550 serial ports ====> In default condition it is 4. Please modify to 16.
3. Now run "make" "make install" to have the modified Linux system in next boot menu.
4. In next boot procedure, you can choose the modified Linux system and find the additional 8 serial ports of OPe958 card. "dmesg" will show the actual configuration for this card (depending on additional tty ports on the system).