Dynamic 3 way conference

Joined: Sun 31 of Aug, 2008

Dynamic 3 way conference

Posted:Sun 31 of Aug, 2008 (21:58 UTC)
I have the following situation that I'm trying to find a solution for:

Party A calls Party B.
Party A and Party B talk for some time.
Party B generates a DTMF, this establishes a call to Party C and conferences Parties A, B and C together (While the call is being established to Party C,
Parties A and B must be able to continue communicating)

I have managed to get this working under Asterisk, but only by placing Party A on hold while Party B calls Party C. Is it possible to keep the voice communications open between Party A and Party B while Party C is called?

Perhaps making Party A and Party B communicate via a conference bridge initially?