Samsung OfficeServ compatable softphones?

[chibianh]

My office uses a Samsung OfficeServ phone system and I'm the sole Mac user in the office. I was wondering if there's any softphones out there that might work with the OfficeServ system. I've tried searching and others have suggested using X-Lite. However, I don't know how to set it up. All I was given to set up a softphone is an ip address, my extension, and a password. I'm using OSX 10.4.3 on an iMac G5. Thanks!