Which settings must be configured for a successful SIP trunk connection in 3CX?

For a successful SIP trunk connection in 3CX, it is essential to configure the SIP server details and codecs. The SIP server details include the SIP trunk provider's hostname or IP address, the transport protocol used (UDP or TCP), and any necessary authentication credentials such as a username and password. Properly inputting this information ensures that the 3CX system can communicate with the external SIP provider, establishing a seamless connection for handling voice calls.

Additionally, codecs must be configured to enable the conversion of audio signals into data packets that can be transmitted over the internet and vice versa. The choice of codec affects both call quality and bandwidth usage, making it a critical setting. Ensuring that both the SIP server details and codecs are correctly set allows for effective call handling, optimal audio quality, and compatibility between 3CX and the SIP provider.

The other options mentioned may contribute to overall network performance or security but are not directly related to configuring a SIP trunk connection. For example, IP address and bandwidth relate to the general network setup, while firewall rules and logs focus on security measures. Network speed and latency are also important for call quality but do not specifically pertain to the SIP trunk configuration itself.