The info You ask for is defined in the appropriate system parameters libraries!
we do not know anything about Your role in Your organization!
so is against the ethics to tell look here, look there!
You might end up accessing datasets You are not allowed to,
and Your security auditors might not like it!
if You have the need to know Your support will gladly provide the info You ask for
Contact your site support group to get this type of data. They are the ones who would know how your machine is configured.
The specific facility is called XCF, which stands for cross-system coupling facility and allows applications in a sysplex to communicate across the LPARs. If you have authority, you can find the LPAR connections with the console command D XCF -- and there's a lot of options for the command that you can look up in the manual.