To establish a secure connection, you require a server certificate and an associated private key in keyring.db. A certificate that has a private key in keyring.db is also called a personal certificate.
When a secure SIP connection is made to Blueworx Voice Response, Blueworx Voice Response presents a personal certificate to other SIP entities. All certificates in the keyring.db database have a label that is associated with them. These labels are for your own organizational purposes and are not part of the certificate. Blueworx Voice Response uses the personal certificate labeled wvr_server_certificate. Adding this certificate is mandatory.