It was just working yesterday that I can make out going calls but now only I can receive calls any ideas ?
Fix whatever is broke?
You aren’t going to get answers with a question like that, you provided no information whatsoever.
how should I know what is broke that is why I am asking this question
What exactly is broken?
You will need to provide some evidence, no? because I can assure you that there are no mind readers here
(As a hint, a real ‘linuxman’ would look into his /var/log/ structure :-))