How to test OTS/9000 RFC1006 by using remote IP address

[Purim Na Bangchang]

I come from Tru64/DECnet background but now I am working on a project to migrate application to HP-UX/OTS9000 using RFC1006.
When I try to test OTS9000 RFC1006 using osidiag, it require me to input remote NSAP information. But I don't know remote NSAP of machine that I need to connect to. I know only IP address and TSAP. How can I test OTS9000 RFC1006 using only IP address or how can I get NSAP of remote machine.
P.S. It seems like remote machine NSAP (Siemens PLC) doesn't follow HP standard. I have tried 540072872203 + IP address but I still have no luck.