FreePBX - Dahdi Source

I’m trying to add HPEC with our install of FreePBX, but there doesn’t seem to be any source for Dahdi included in /usr/src … does anyone know how I can add it?

to get the latest:-

wget -O /usr/src/dahdi-linux-complete-current.tar.gz;cd /usr/src;tar -zxsf dahdi-linux-complete-current.tar.gz;cd dahdi-linux-complete*

apply any patches, changes you want then:-
echo “go get a beer… .”&&make && make install&&service asterisk stop&&service dahdi restart&&service asterisk start

iterate the the last two thingies until it works for you . . . .