[*] install on fc5 questions

[Tom Poe]

I want to set up an old PIII as a VOIP pbx server to handle personal 
phone calls over SIP.  First, though, I have a PIII with 512Mb RAM, as a 
general purpose workstation, and want to install it on the FC5 operating 
system, as a learning howto project.  I'm hooked up to the regional 
Qwest monopoly with their 26Kb download DSL crap they call broadband, 
and not sure if they're going to cooperate (cynical).  Is there a 
special audio card I need, before starting?  I'm currently using IBM 
82801 sound card.
Thanks, Tom