More importantly, it states that it supports Warp3 and Warp4. Which very likely means, it is supported by the existing COM.SYS as they do not supply an OS/2 driver.
If one can install this card under Windows and install the Windows driver, it will be possible to find all the relevant parameters to add to the COM.SYS config file "PCIDEV.TBL" which should be located in the OS2\BOOT directory. If it does not exist, that file is located in the DDK ...