Hi, could you please contact
support@obihai.com? state your 9 digit OBi number in the email, and we like to look into your device and diagnose the problem.
Regarding your questions-
1/ Echo cancellation - integrated into the device, and fully adaptive, no need for any configuration.
2/ Voice Activity Detection (VAD) - VAD is a technique used in a number of features in OBi device. While algorithm itself is not configurable, you can surely adjust settings on other features, e.g., silence suppression/detection.
3/ Silence suppression
- Silence suppression,
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Codec profile -> silence suppression - LINE port long silence detection
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Physical interface -> LINE port -> SilenceDetectionSensitivity / SilenceTimeThreshold, ... - PHONE port silence detection
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Physical interface -> PHONE port -> silenceDetectionSensitivity ....