How to Paging in Freepbx

Hi all,

I am currently working on asterisk and freepbx. Trying to set up a small system that is capable to do a paging. So, I am using asterisk+freepbx in server A , 2 clients (2 softphones) in server B, a softphone in server C.

The scenarion is that a softphone in server C say something, so that those using different softphones in server B (2 clients) could hear simultaneously.

I have read in some literatures, the first step is that by adding a paging module in freepbx and then make a same extentions for clients (2 clients) in Server B.

Does anyone can give any hand how to add extentions and set up a paging module?