[Freeswitch-users] Mobile callback + DISA

Hi all, I am new to FS but have been working with * for a while.. I have * setup for callback+DISA used by family for cellular minutes. Have been looking at FS this past month or so as I'd like to setup FS on my router with DD-WRT + FS. Presently I have figured out how to setup disa.js for DISA on my cell BUT I can't seem to find anything out on the web about configuring callback. Has anyone figured out how to setup callback+DISA? Any help is appreciated, links or any ideas would help me over this hurdle. Cheers, S.