Great news! So that article you posted helped me fix the issue. The sccp.conf needed to have the following lines set:
allow=g729
earlyrtp=progress
Once I set those, restarted Asterisk, everything works now as it should now. I can place a call using my SIP trunk and the ringback tone is there for ALL calls now. This can also be set within the SCCP Connectivity. See screen shots:
Thank you so much for your help Stewart1!
Hopefully this post can help some else in the future! Long live FreePBX!