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Reference : Voice & Video view columns
Voice & Video view columns
The following table describes the columns available in the Voice & Video Calls and Media views of a capture window. Some columns are specific to either the Calls or Media view.
For a list of additional columns available in the Voice & Video Flow Visualizer, see Voice & Video Flow Visualizer columns.
Column
Description
Call Number
Internally generated call ID. First captured call is call 1, second is call 2, and so on.
Note: Do not confuse this with the “phone number” string that often appears in the gateway-assigned “Call ID” column.
Flow Index
Internally generated index for a single flow within a call. The first flow is index 1, second is 2, and so on. Signaling and control flows also consume index numbers, so it is rare that a call's media flows will occupy indices 1 and 2.
SSRC
Synchronization Source: a unique 32-bit hexadecimal value that identifies a single media flow within a node.
Name
Internally generated string identifying a call: “from--> to” or a media flow: “RTP src:port--> dest:port”
Flow ID
PeekFlow-assigned ID of this single signaling, media, or media control flow. Corresponds to Flow ID values in Expert and Web views. Most flows contain two media flows, one for each direction.
From
Caller-assigned “phone number” of the node initiating the call.
To
Callee-assigned “phone number” of the node receiving the call.
Call ID
Gateway-assigned call identifier string, usually some sort of globally-unique identifier.
Call Status
Status of call is either “Opened” or “Closed.”
Asserted Identity
P-Asserted-Identity field from SIP headers.
End Cause
Most recent call termination signaling like BYE or 480 not available.
Signaling
Specific signaling protocol for this row.
Protocol
Protospec name of this row. See also Signaling and Codec columns.
Codec
Codec used for media.
Bit Rate
Voice and Audio: Average bitrate for the audio stream in bits per second.
 
Video: Average bandwidth of transmitted video content in bits per second, excluding IP overhead, FEC (Forward Error Correction), and retransmissions.
Codec Type
Type of media flow: voice, audio, or video.
DSCP
Differentiated Services Code Point (DSCP) is meant to categorize the packet into a specific class which can then be used to manage and classify network traffic. This provides Quality of Service (QoS) to modern IP networks.
Caller Address
IP address or name table entry of node initiating the call.
Caller Port
UDP port for the node initiating the call, usually applies only to individual flow rows such as media flow rows.
Callee Address
IP address or name table entry of node receiving the call.
Callee Port
UDP port for the node receiving the call, usually applies only to individual flow rows such as media flow rows.
Gatekeeper Address
IP address of the first gatekeeper or proxy contacted by the caller
Gatekeeper Port
UDP port of the first gatekeeper or proxy contacted by the caller
Source Addr
The source address for this media flow.
Source Port
UDP port of node sending this media flow.
Dest Addr
The destination address for this media flow.
Dest Port
The destination port for this media flow.
Media Flows
Number of separate media flows within this call. Often two per call.
Media Packets
Number of packets in media flow.
Control Flows
Number of media control flows.
Control Packets
Number of media control packets.
Signaling Flows
Number of signaling flows.
Signaling Packets
Number of signaling packets.
Packets
Total number of packets in the call, including all media, signaling, and control flows.
Setup Time
Time between first signaling packet and the last signaling packet before media packets start flowing.
PDD
Post Dial Delay: Time between last signaling packet and first media packet.
One-Way Delay
One half of the average round-trip delay for this call or flow.
Start
Time of first packet in this call or media flow.
Finish
Time of last or most recent packet in this call or media flow.
Duration
The difference between Finish and Start times.
MOS-LOW
Because MOS scores are based on media flows, not calls, each call's quality shall be considered to be the lowest MOS score (MOS-LOW) of any of it's associated media flows. Voice media shall be scored with MOS-CQ and video media with MOS-V.
Jitter
A measurement of the delay variation of received packets, in seconds.
Packet Loss %
Expected but never received packets as a percentage of expected packets.
MOS-LQ
An estimated listening quality Mean Opinion Score, suitable for comparison with published MOS scores.
MOS-CQ
An estimated conversational quality Mean Opinion Score, incorporating factors (such as echo and delay) that affect conversational quality.
MOS-Nom
The nominal (generally accepted maximum obtainable) MOS score for the audio stream, given a typical transmission system and particular audio codec.
MOS-AV
Audiovisual MOS, a 1-5 score that considers the effect of picture and audio quality and audio-video synchronization on overall user experience.
MOS-V
Video Mean Opinion Score, a 1-5 score that measures the impact of the video codec, image size, frame rate, packet loss distribution, GoP structure, content, and frame loss concealment on viewing quality.
R Factor Listening
Provides an estimate of the effects that packet loss, jitter, and codec type had on listening quality for the call.
R Factor Conversational
Provides an estimate of the perceptual quality of the call, incorporating factors that affect conversational quality.
R Factor G.107
The ITU-T G.107 R-factor calculated for the audio stream.
R Factor Nominal
The nominal (generally accepted maximum obtainable) R-factor for the audio stream, given a typical transmission system and selected audio codec.
VS-TQ
Video Service Transmission quality, a codec independent score measuring the ability of the IP network to reliably transmit video content.
Voice Loss Degradation
Severity of perceptual quality degradation caused by packet loss.
Voice Discard Degradation
Severity of perceptual quality degradation caused by packet discard (jitter).
Voice Codec Degradation
Severity of perceptual quality degradation caused by codec distortion.
Voice Delay Degradation
Severity of perceptual quality degradation caused by delay.
Voice Signal Level Degradation
Severity of perceptual quality degradation caused by signal level too high/too low.
Voice Noise Level Degradation
Severity of perceptual quality degradation caused by excessive noise.
Voice Echo Level Degradation
Severity of perceptual quality degradation caused by uncancelled echo.
Voice Recency Degradation
Severity of perceptual quality degradation caused by the recency of burst packet loss.
Video Loss Degradation
Severity of perceptual quality degradation caused by packet loss.
Video Discard Degradation
Severity of perceptual quality degradation caused by packet discard (jitter).
Video Codec Quantization Degradation
Severity of perceptual quality degradation caused by codec quantization.
Video Codec Bandwidth Restrictions Degradation
Severity of perceptual quality degradation caused by codec bandwidth restrictions.
Video Frame Resolution Degradation
Severity of perceptual quality degradation caused by frame resolution.
Video Frame Rate Degradation
Severity of perceptual quality degradation caused by frame rate.
Video GOP Length Degradation
Severity of perceptual quality degradation caused by GoP (Group of Pictures) length.
Video Available Network Bandwidth Degradation
Severity of perceptual quality degradation caused by available network bandwidth.
Video Delay Degradation
Severity of perceptual quality degradation caused by delay.
Video A/V Synchronization Degradation
Severity of perceptual quality degradation caused by audio/video synchronization.
Video Recency Degradation
Severity of perceptual quality degradation caused by the recency of burst packet loss.