When establishing calls between two bridged PBX systems, will audio be exchanged directly between extensions?

In scenarios where two bridged PBX systems communicate, audio does not typically flow directly between extensions. Instead, the audio is routed through the SIP trunk or the bridge connecting the two systems. This means that the media streams are handled separately rather than being exchanged directly. The architecture of PBX systems is such that even when they are connected, the communication may rely on a centralized point to manage the connections and audio transmission.

This process helps ensure greater control over call quality, security, and compatibility, especially when different network configurations or codecs are in use. Hence, without specific configurations that allow direct media path setups or unless certain conditions are met, the audio exchange remains mediated by an intermediary system or trunk, confirming that the statement is indeed false.