[quote=“batmon”]Thanks. Can you tell me where to put answeronpolarityswtich and Waitforsilence? What file do I need to edit?
Thank you.[/quote]
Hello,
Just want you to know that I figured out how to do Waitforsilence but I just hear the silence and nothing else. Instead, I now let it keep repeating my message until I press “2” to “goodbye” the call. This works for me. 
Thanks for all your help!! 
As you discovered, Waitforsilence and BackgroundDetect are both asterisk commands that you use in your dialplan. Answeronpolarityswitch is a setting in zapata.conf for your channel.
Yes, Waitforsilence just waits. If you want to play something in the background while you wait to detect an answer (defined as a prolonged silence), then you can use BackgroundDetect. You should be able to google examples of this asterisk command to get it working; just set your silence wait time to about 4250 ms (for US telco) if you are using a zap channel.
I have not used answeronpolarity switch. You should be able to google some examples. Odds are, your telco does not provide this service to you anyway. I couldn’t even find anyone at my telco that understood what answer supervision was let alone figure out if I had or could order the service.