Certificates are used to provide secure connections, such as HTTPs (secure connection to the web portal) or FreeSBC secure SIP calls (SIP over TLS).
This article describes how to import or create certificates. These certificates are later grouped into TLS Profiles, which is the first step in configuring secure SIP on FreeSBC. Use standard openssl shell commands to create your own certificates.
https://docs.telcobridges.com/tbwiki/Create_A_SIP_Certificate_A