The VoIP Call leg Statistics dialog box provides information on the VoIP Call leg.
The following information appears:
On Time Rv Play Out (cvVoIPCallActiveOnTimeRvPlayout)
Gap Filled With Silence (cvVoIPCallActiveGapFillWithSilence)
Gap Filled With Prediction (cvVoIPCallActiveGapFillWithPrediction)
Gap Filled With Interpolation (cvVoIPCallActiveGapFillWithInterpolation)
Gap Filled With Redundancy (cvVoIPCallActiveGapFillWithRedundancy)
On Time Play out Rate (On_Time_Playout_Rate)
High Water Mark Play out Delay (cvVoIPCallActiveHiWaterPlayoutDelay)
Low Water Mark Play out Delay (cvVoIPCallActiveLoWaterPlayoutDelay)
Receive Delay (cvVoIPCallActiveReceiveDelay)
Lost Packets (cvVoIPCallActiveLostPackets)
Duration of voice playout from data received on time for this call.
This value summed with the duration of the gapfills gives the total voice playout duration for active voice. This does not include any duration in which no data is sent by the transmit end as a voice signal, such as silence suppression and fax signal. The on-time playout rate is computed by dividing this entry by the total voice playout duration.
Duration of voice signal replaced with signal played out during silence because voice data was not received on time (or was lost) from voice gateway.
Duration of voice signal played out with signal synthesized from parameters or samples of data proceeding in time because voice data was not received on time (or was lost) from voice gateway. An example of such playout is frame-erasure or frame-concealment strategies in G.729 and G.723.1 compression algorithms.
Duration of voice signal played out with signal synthesized from parameters or samples of data proceeding and following in time because voice data was not received on time (or was lost) from voice gateway.
Duration of voice signal played out with signal synthesized from redundancy parameters available because voice data was not received on time (or was lost) from voice gateway.
Duration of voice playout from data received on time for this call.
This value summed with the duration of the gapfills gives the total voice playout duration for active voice.This does not include duration for which no data is sent by the transmit end as voice signal, for example, silence suppression and fax signal. The on-time playout rate is computed by dividing this entry by the total voice playout duration.
The formula for computing the On Time Play Out Rate is as follows:
cvVoIPCallActiveOnTimeRvPlayout divided by (cvVoIPCallActiveOnTimeRvPlayout + cvVoIPCallActiveGapFillWithSilence + cvVoIPCallActiveGapFillWithPrediction + cvVoIPCallActiveGapFillWithInterpolation + cvVoIPCallActiveGapFillWithRedundancy).
The high water mark voice playout FIFO delay during the voice call.
The low water mark voice playout FIFO delay during the voice call.
The average playout FIFO delay summed with the decoder delay during the voice call.
The number of lost voice packets during the call.
The number of received voice packets that arrive late to playout with CODEC during the call.
The number of received voice packets that arrive too early to store in jitter buffer during the call.