[Freeswitch-users] Using fifo_orbit_announce For On-hook Agent

Hi FreeSWITCH, I want to use fifo_orbit_announce to play specific agent greeting to his caller (can not insert it to caller dialplan). As my agents are on-hook (they use extensions to login / logout of queues) , I don't know if I could set this variable in login extension! If I can not use this way, is there any other way? appreciate all comments, BEST, -- afshin