About SIP Ports

A SIP port defines the transport address and protocol the Oracle® Enterprise Session Border Controller will use for a SIP interface for the realm. A SIP interface will have one or more SIP ports to define the IP address and port upon which the Oracle® Enterprise Session Border Controller will send and receive messages. For TCP, it defines the address and port upon which the Oracle® Enterprise Session Border Controller will listen for inbound TCP connections for a specific realm.

You need to define at least one SIP port, on which the SIP proxy will listen for connections. If using both UDP and TCP, you must configure more than one port. For example, if a call is sent to the Oracle® Enterprise Session Border Controller using TCP, which it needs to send out as UDP, two SIP ports are needed.