During calls, the calling SDK might trigger events called User Facing Diagnostics (UFDs), these UFD events indicate a user may have perceived a poor call experience for various reasons. For example, their video freezes and their network quality drops in the middle of a call. Since UFDs are symptomatic by nature and are triggered based on broad quantitative criteria, there can be various root causes that trigger a UFD event. Additionally, a UFD can be triggered but the user might not perceive an issue during a call because the calling SDK was able to mitigate any potential issue. In contrast, the reliability tab attempts to provide more concrete error code and subcode information for your analysis.
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