Remove Astserisk completely

As root user

# service asterisk stop
# service dahdi stop

# rm -rf /etc/asterisk
# rm -f /etc/zaptel.conf
# rm -rf /var/log/asterisk
# rm -rf /var/lib/asterisk
# rm -rf /var/spool/asterisk
# rm -rf /usr/lib/asterisk
# rm -rf /usr/lib64/asterisk/
# rm -rf /usr/include/asterisk
# rm -rf /usr/src/asterisk