[App_rpt-users] Putting a connection on "hold"?

Is there a way to put a an asterisk/app_rpt connection on "hold"? What I'm envisioning is this: Node A is connected to nodes B, C, and D, let's say. A user on node A wants to make a brief call from node A to node E, but not have the people on B, C, and D hear the audio. Is there a way to basically say, "put all current connections on hold", make a new connection, talk for a moment, disconnect, and then say "ok, take everybody off hold"? Thanks! phil