Compile-install Zaptel (DHADI) and Asterisk

cd /usr/src/dahdi-linux-complete-2.4.0+2.4.0
make clean && make all && make install && make config

cd /usr/src/libpri-1.4.11.4
make clean && make && make install

cd /usr/src/asterisk-1.6.2.13
make clean && ./configure && make menuselect

select core sounds and uncheck all except ulaw.  Same with addon sounds
At menu press "x" to save

make && make install

mkdir /var/run/asterisk