Asterisk presence and freepbx

Hi folks,

I would like to implement the presence feature in my environment (piaf server + eyebeam clients).

Based on:
http://www.voip-info.org/wiki/view/Asterisk+presence
I know that I’ve to implement the magic word ‘hint’. The questions are two:

  1. how it works?
  2. how to implement that via freepbx?

Any advice will be appreciated
Best Regards
Andrea