Ring Groups -- conference call

We need a phone to be able call a ring group and have all the phones answers and join a conference call.
That is the Ring Group would continue to ring all the phones (not stop after first is answered) in the group until they get answered and join the conference call.

Thanks for any suggestions.

Hi you could try adding the M option so a macro is called on answer add in the user to the conference. Never tried it but in theory should work. The macro bit does work I use it for confirmed answers