I will try it with Trixbox (asterisk@home)
When testing Asterisk, I used the Asterisk@Home CD on an old 366 Celeron, and it was such a simple install and setup.
I have since moved to using smeserver-asterisk & selintra-sail (which required a little more learning....) and am happily using it on my home server.
For that setup I have just used the tftp-server from centos with selintra-sail and not my version.
yum --enablerepo base --enablerepo updates install tftp-server