If a zone's sipSigPort is configured for transportProtocolsAllowed = sip-tls-tcp , and either Egress IPSP Transport Type is TLS Over TCP and/or the Egress TG’s transportPreference is tls-tcp, the SBC increments the configured portNumber by 1 and uses it as the new port number for SIP over TLS signaling. The SBC then opens a TCP socket for SIP over TLS for the new TCP port number. Example: When sipSigPort is configured with a portNumber of 5060 and transportProtocolsAllowed = sip-tls-tcp , the SBC listens on TCP port 5061 for SIP over TLS. |