Paging and conferences

Hello everyone. This is my first post and my first time using free pbx. Can anyone help me in achive the following:

  1. When someone starts a paging I need that all extension in the paging group response to the page (this part is working fine) and also that the page enters a already created conference (I don’t know how to do this). The conference does not have password.

Any help will be highly appreciated.