Cards and interfaces in Asterisk


I am trying to install anc configure the Asterisk and I would like to ask some questions.

  1. What cards can I use for the Interfacing of normal ISDN and PASTN line?
  2. Is it possible to configure the Asterisk to run external scripts like perl and php?
  3. Is there a similarity in the configuration of other cards that are not zaptel?

thats for now.

Thanks a lot