cdspVadAdaptive 1.3.6.1.4.1.9.9.86.1.4.1.1.5

This attribute is used to enable or disable the Adaptive VAD knob of the VAD algorithm. Adaptive VAD works in conjunction with VAD Threshold (cvifcfgMusicOnHoldThreshold from CISCO-VOICE-IF-MIB). When this object set to 'true', VAD Threshold is ignored and the DSP adjusts the threshold automatically according to the background noise level. When the adaptive VAD configuration is 'false', VAD threshold is used directly. The VAD configuration is ignored for all CODECs that contain their own VAD (G.729AB, G.723.1A and GSM-EFR). Likewise, when a channel is configured in ClearChannel mode (Clear Channel is Non-Compression CODEC channel), VAD will automatically be disabled irrespective of the configuration.