asterisk users - Jul 2015 - confbridge play tone before speaking

I use both confbridge to bring several devices into
a receive only or listen mode, then allow the one person
on the phone to speak live over those devices.
Works great.

However - now I would like to be able to "play a tone"
into the conference before the person speaks.

How might that be accomplished?

Thanks,

Jerry
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.digium.com/pipermail/asterisk-users/attachments/20150702/b6ca5a50/attachment.html>