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, video media with MOS-V, and audio media with MOS-A.

Jitter

Jitter in seconds. Packet-to-Packet Delay Variation (RFC 3550)

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.