pusa wrote:which cards are supported in 8.9 by default? and how to install HSO driver?
Well, it depends on which kernel you're running. Card support is in the usbserial and usbnet drivers (option, sierra, hso) and newer or older kernels have newer or older versions of these drivers.
Though regardless of the kernel version, you're still looking at upwards of 100 devices between option, sierra, and hso.
The HSO driver is in drivers-->usb-->net. It creates /dev/ttyHSX devices instead of /dev/ttyUSBX devices, and Option provides its own shell script for connecting the cards, name hso_connect.sh which is provided with the driver.
Like I had suggested before, read the information provided in the link I sent you. It has all of the information you are looking for.