I presently have sip trunks with 2 providers, voip.ms and Flowroute, that I have established successfully with a TLS connection.
I can make and receive calls on these trunks.
I have not explicitly, to the best of my knowledge, enabled SRTP on the endpoints.
Is my understanding correct that if TLS is enabled on the SIP registration only the SIP traffic is traversing the encrypted tunnel and the actual RTP payload is passing from/to my ITSP unencrypted?
Or is the actual situation that the the RTP traffic on my internal network is unencrypted but the entire “conversation” from my IP to/from my ITSP is in an encrypted tunnel.
Have researched this for a long time but my Google-Fu seems to be failing in providing the correct search terms to narrow my results.
Any insight or corrections to my understanding would be appreciated. Thanks.