at: http://wiki.openpbx.org/tiki-index.php?page=Easy%20route%20to%20building%20OpenPBX.org A number of dependencies are listed, with a Debian slant. I have found most of these in our standard Centos repos ( snarfed spanDSP from trixbox repo). But the following I have not figured out: * linux headers for your kernel is this glibc-kernheaders? * Libssl-dev is this openssl-devel? What is "Sox and associated libraries (ogg vorbis etc.) " I see sox and sox-devel And I know I can get zaptel from Trixbox, if needed. With these last items, I will be ready to actually install OpenPBX on this system. And hopefully it will not blow up in my face!