asterisk users - May 2004 - Fedora Core Soft Phone that works?

Hi,

Does anybody know of a SIP or IAX soft phone that works with Fedora Core 
2. I've tried Zultys's one and after I type softphone it does nothing 
and goes back to a console prompt with no debug output. When I try 
linphone it says it tries contacting but just keeps spewing Not Yet 
Established! to the console. It registers ok tho.

Thanks,
Nicholas Ruddick