Dear List, There’s 2 ways to establish TLS tunnels for SIP. The first being Static where the TLS certificate exchange is established and then the TLS link stays up for let’s say 30mins. The second is Dynamic where for every new call the certificate is exchanged. It seems that FreeSWITCH uses by default the Dynamic method, but, can the Static be used? What are the configuration options? Thank you so much With best wishes, Unai Rodriguez