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TLS port-to-certificate mapping concepts

SIP/TLS lines can use only one line certificate per port. Therefore, if you have multiple SIP/TLS lines and one of the lines requires a different certificate for its connection (for example, to a gateway, SIP Proxy server, and so on), you must map a port number to the line certificate to use for that connection. The port for each line is specified on the SIP line's Transport tab, in the Receive Port box.

By default, when only the default line certificate is being used, all TLS line ports maps to that certificate and no mappings appear or are required in the Port-To-Certificate Mappings tab.

When you use a pair of switchover servers, you must assign a port number to the domain certificate in the Line Certificate list and then add it to the Port-To-Certificate Mappings list. The default port number for all SIP/TLS lines is 5062. Port 8062 is recommended for the SIP/TLS line and certificate map to the domain certificate.