The S30 terminal has the CE 5.0 operating system loaded as default. So you are limited by the operating system and not the hardware when it comes to network printing.
Here is a extract of the release notes for Windows CE 5.0:
"In Windows CE, TCP/IP supports network printing through the Server Message Block (SMB) protocol. It does not provide the Windows Line Printer Remote (LPR) Spooler. However, independent software vendors (ISVs) and original equipment manufacturers (OEMs) can add this support."
In short, you need a 3rd party software program or a (SMB) printer server setup to setup network printing on the S30 terminal..
Wyse also have add-on software to help, if you have CE 5.0 loaded then try the "Thinprint" add-on supplied as a free download by them.
I haven't tried this, so let me know if it works.