[Freeswitch-users] Call Broadcasts - when to start playing?

I've got a simple message that a business needs to play for all his contacts. How do you folks do broadcasts? There's the commerical mod_amd but I don't think I'm getting that just yet. wait_for_silence for 2 seconds (to wait out the answering machine?), then play the message? How many "intervals" is 2 seconds? Or mix wait_for_silence with mod_avmd via ESL so either one triggers it? Or does mod_avmd do both the beep (voicemail still beeps??) and the silence? Thanks for your input, -Avi