What information is needed to configure the 3CX SBC for connection?

To successfully configure the 3CX SBC (Session Border Controller) for connectivity, it is essential to provide the relevant port information and authentication details that enable secure communication between the SBC and the 3CX PBX. The combination of the tunnel port, SIP port, and tunnel password ensures that the SBC can both connect to the PBX and correctly route SIP traffic while maintaining a secure tunnel for communication.

The tunnel port represents the specific port through which the SBC will establish a direct connection to the 3CX PBX, while the SIP port is necessary for managing session initiation protocol traffic, crucial for handling voice calls. The tunnel password acts as an authentication method, ensuring that only authorized SBC instances can connect to the PBX, thus enhancing security.

The other choices may contain elements that are relevant for other parts of a 3CX setup but do not encompass the specific requirements needed to configure the SBC connection effectively. For instance, knowing the PBX's IP address and version is more about identifying and maintaining the PBX system rather than establishing a direct SBC connection. The DNS and proxy settings relate to how the 3CX server resolves addresses and communicates over a network. Administrator credentials and network settings are important for general system management but are not required for