Arches, please test & mark stable =net-misc/dahdi-2.5.0.2-r4; your ability to repeatedly load & unload the resulting dahdi kernel module will suffice (unless of course you have the appropriate hardware to test DAHDI through Asterisk). Compared to current stable 2.5.0.2-r2 this offers a newer "extra" patchset with additional hardware support. It will also cope in a corner case where zaphfc might cause a segfault.
amd64 ok
amd64: pass
x86 stable
+ 23 Apr 2012; Tony Vroon <chainsaw@gentoo.org> -dahdi-2.5.0.2-r2.ebuild, + dahdi-2.5.0.2-r4.ebuild: + Marked stable on AMD64 based on arch testing by Maurizio "k01" Camisaschi & + Elijah "Armageddon" El Lazkani in bug #411859. Removed old ebuild.