In Twilio console, navigate to "Explore Products"
Scroll down to the "Developers tools" section
Click on "TwiML Bins"
Click "Create new TwiML Bin"
Enter a Friendly Name
Add the following text in the TWIML box
<Response>
<Gather action="https://Your-Dualshield-FQDN:8074/sso/callback/twilio/voice" method="POST" >
<Say voice="alice" language="{{LANG}}" loop="2">{{MSG}}</Say>
</Gather>
</Response>