Does the 3CX SBC help with NAT issues?

The 3CX SBC (Session Border Controller) is designed to facilitate the smooth operation of VoIP services by addressing NAT (Network Address Translation) issues. The correct answer emphasizes that the SBC eliminates the need for NAT at both the remote and local locations when properly configured.

The SBC achieves this by creating a secure tunnel between the 3CX server and the remote endpoints, effectively managing and optimizing media streams. This means that devices behind a NAT or firewall can communicate directly with the 3CX system without the complexities and potential issues that can arise from NAT traversal. This capability significantly enhances reliability and performance for remote extensions and ensures that voice calls are of high quality with minimal latency and jitter.

In contrast, the other options suggest limitations or conditions that could confuse users. For example, stating that NAT is still required implies that the benefits of using an SBC are not fully realized. Additionally, claiming that it only helps at the remote location or only for specific firewall configurations contradicts the comprehensive functionality of the SBC, which is designed to handle NAT issues effectively across both locations.