[Freeswitch-users] fifo strategy and fifo outbound

Hi, I want to know how fifo_strategy is to be used. When specifying MOST_PPL or WAIT_LONGEST, how will freeswitch select the caller for consumer? Does consumers wait on more than one fifo and freeswitch would select the fifo based on either MOST_PPL or WAIT_LONGEST? Then, freeswitch will just select the caller that has waited longest? Is that how it works? Does fifo has the ability to make outbound call to callers? If so, how to set it up? thx, Mark