I am trying to dial an internal conference server automatically.  I am able to dial the conference extension and if I dial the PIN number it works, but I need to be able to dial it automatically. 

I have tried to send the PIN number with "send dtmf" after the bridge and that did not work.  I have tried to dial the extension with ",, " (pause)  and that did not work either.  Finally I tried to "queue_dtmf" before the bridge and it also failed.

My goal is to have a dial plan so the user just dials the 3+ <conference PIN number>  This will trigger the dial plan to dial the conference server and auto join the conference. 

So far I got it to dial the conference server, but can't figure out how to make it dial the pin after connection.

Box1 where the users are connected is a FusionPBX server and the conference server is a plain freeswitch box.