[App_rpt-users] What is Dahdi?

OK, not being a wise-ass, not trying to be stupid, that part’s covered. Just trying to understand. What are the specific functions of: Dahdi Asterisk Libpri Zaptel I know they are all part of the whole package, and that whole package still has me in awe. But being very curious type I wanted to know how this all comes together. In my simple mind I axe: why isn’t Asterisk enough? I know what that one is, but as I use app_rpt daily I wish I knew which of the above are providing what part of the overall system. George J Csahanin W2DB Allstar 2360 Echolink-Free Cedar Park, TX 512-401-2630 home 401-338-0568 cel