Looking in the gateway menu, I am not seeing a means to set up a connecting to a provider via TLS/SRTP.
@KNERD It has to apply in freeswitch on server and in sip profile on GUI.
That does not seem correct from an ASTPP perspective.
There are only four fields available in SIP Profile.
Looking at
https://freeswitch.org/confluence/display/FREESWITCH/SIP+TLS
You need to set up external profile, and more fields are required than the ASTPP SIP profile menu provides.