afaik there is no such feature built into freeswitch, you would have to add it yourself, or pay someone to do it, maybe you can try the commercial support.

On Sun, Apr 14, 2019 at 2:14 PM Moshe Rosenberg <moshe.rosenberg@gmail.com> wrote:
Hi

 I am trying to set up that there should be an announcement in a call center que if you would like a call back please enter your number now and the system should either email this info or automatically call back when the agent becomes available 

I can't seem to find this in freeswitch 
_________________________________________________________________________
Professional FreeSWITCH Services
sales@freeswitch.com
https://freeswitch.com

Official FreeSWITCH Sites
https://freeswitch.com/oss
https://freeswitch.org/confluence
https://cluecon.com

FreeSWITCH-users mailing list
FreeSWITCH-users@lists.freeswitch.org
http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
https://freeswitch.com