Cisco TelePresence SX20 and Codec C series Enter the IP address of the device in your browser. Enter your username and password. Navigate to Setup > Configuration > SIP. Configure the following and click Save after each option: Select On for ANAT. Select Auto for DefaultTransport. Enter the DisplayName. Select Private for the Line. Select Off for the ListenPort. Select TLSv1.2 for the MinimumTLSVersion Select IPv4 as the PreferredIPSignaling. Enter the Proxy Address. Select Off for TlsVerify. Select Standard for the Type. Enter the <extension>@lifesizecloud.com for the URI. Enter the Password. Enter the UserName. This is the extension of the device.