Integrate Astersik with Alcatel

Can anyone help me with this integration?

We have two offices, one has a complete setup of Alcatel PBX with Alcatel IP phones and the other has the usual Analog phones. I have installed asterisk to be able to make calls as extensions to our HQ which has Alcatel.

  1. how do i achieve this?
  2. is it possible to install IP phones to the asterisk server so I can call extension to our HQ via phones instead of soft?