How make Call Forward (Busy, No Answer, Uncondicontional) on asterisk configuration
becuase I can configure theses stuff in the phone but can i configure in the asterisk configuration files? HOw?
Sure you can, have a look here:
voip-info.org/wiki/view/Aste … forwarding
you can do it either as a static forward, or as a dynamic forward where the owner of the extension can change the number to which he want to forward all his calls.