# VoIP Call Leg Statistics

The VoIP Call leg Statistics dialog box provides information on the VoIP Call leg.

## Navigation

1. Right-click on the Access Gateway Module, then select Voice Configuration > Active Call Configuration > VoIP Call leg Configuration.
2. Click Monitor, then select VoIP Call leg Statistics.

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)

> Late Packets (cvVoIPCallActiveLatePackets)

> Early Packets (cvVoIPCallActiveEarlyPackets)

### On Time Rv Play out (cvVoIPCallActiveOnTimeRvPlayout)

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.

### Gap Filled With Silence (cvVoIPCallActiveGapFillWithSilence)

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.

### Gap Filled With Prediction (cvVoIPCallActiveGapFillWithPrediction)

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.

### Gap Filled With Interpolation (cvVoIPCallActiveGapFillWithInterpolation)

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.

### Gap Filled With Redundancy (cvVoIPCallActiveGapFillWithRedundancy)

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.

### On Time Play Out Rate (On_Time_Playout_Rate)

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).

### High Water Mark Play Out Delay (cvVoIPCallActiveHiWaterPlayoutDelay)

The high water mark voice playout FIFO delay during the voice call.

### Low Water Mark Play Out Delay (cvVoIPCallActiveLoWaterPlayoutDelay)

The low water mark voice playout FIFO delay during the voice call.

### Receive Delay (cvVoIPCallActiveReceiveDelay)

The average playout FIFO delay summed with the decoder delay during the voice call.

### Lost Packets (cvVoIPCallActiveLostPackets)

The number of lost voice packets during the call.

### Late Packets (cvVoIPCallActiveLatePackets)

The number of received voice packets that arrive late to playout with CODEC during the call.

### Early Packets (cvVoIPCallActiveEarlyPackets)

The number of received voice packets that arrive too early to store in jitter buffer during the call.