Obtain a twinaxial driver.
The driver required to support TCP/IP over a twinaxial connection is not shipped with iSeries™ Access for Windows®. You must download it from the following Web site: http://www.networking.ibm.com/nhd/webnav.nsf/pages/525:525home.html
If you are using TCP/IP over a twinaxial connection, see Information APAR II11022 for the support statement regarding iSeries Access for Windows on this type of connection.