/etc/init.d/dahdi: No such file or directory

i have problem in starting the dahdi as service.

i am able to install dahdi but while running
i get " No such file or directory"
chkconfig dahdi on
error reading information on service dahdi: No such file or directory

my details
dahdi dahdi-linux-complete-2.11.0+2.11.0
centos 6.7 64 bit
kernel 2.6.32-573.18.1.el6.x86_64

but in asterisk cli i can run
dahdi show status
dahdi show channels
module reload chan_dahdi.so

You haven’t installed dahdi-tools.