...
h. Goto in the Setup/Identity1 page, RTP tab
i. Set RTP Encryption to ON.
j. Set SRTP Auth-tag to AES-32.
k. Set RTP/SAVP to Mandatory.
l. Set Packet Size to 20ms
m. Set Media Transport Offer to UDP
n. Goto in the Certificates
o. Enable the server identity check in TLS connection by pushing the "TLS" button in "Unknown Certificates"