To manage media encryption in SIP calls, set SIP Security in Preferences > Security to one of the following values:
||Encrypted media is not supported.
||Both encrypted and unencrypted media are supported. Encrypted media is supported only if the far end supports encryption.
||Unencrypted media is not supported.
If media is encrypted in SIP calls, enable TLS signaling in Preferences > SIP Registrar 1 (or 2) > SIP Signaling.
NOTE: If UVC ClearSea manages your Lifesize Icon or your Icon is connected to the Lifesize cloud-based service, you cannot edit SIP security preferences.
Read more about SIP.