Ring Groups to Conference

Hi there..

As a newbie on FreePBX..need some help to combine ring group to conference (or something like that).

1. I have 5 SIP extensions local/internal (2001 to 2005) up and running
2. And a conference code (50) working as well
3. A ring group (301).
   with ring all, but as soon as one person answers, the other extensions in the group are dropped

Now
the requirement is to keep ringing these extensions so that everybody
that picks up the call lands in a conference with the caller.

Thank you