Asterisk VoIP News has posted some good tips for installing Asterisk on Fedora Core 5 from Matt Birkland, a Seattle Asterisk PBX Integrator. Fedora Core 3 and 4 are supported by Digium, but not 5.

The Zaptel drivers compile fine(get your 2.6-dev installed to be safe) the main problem is that ABE looks for specific libraries of older versions found in Fedora Core 3 and 4. Below is the list of failed dependencies and how to install the correct ones without breaking half the programs.