Cisco Systems OL-14625-01 manual Mos Lqk

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Chapter 8 Monitoring the Cisco Unified IP Phone Remotely

Streaming Statistics

Table 8-5

Streaming Statistics Area Items (continued)

 

 

 

 

 

 

Item

 

Description

 

 

 

 

 

Rcvr Lost Packets

Total number of RTP data packets that have been lost since starting receiving data on this

 

 

 

 

 

connection. Defined as the number of expected packets less the number of packets actually

 

 

 

 

 

received, where the number of received packets includes any that are late or duplicate. The

 

 

 

 

 

value displays as 0 if the connection was set to send-only mode.

 

 

 

 

 

 

Avg Jitter

 

Estimate of mean deviation of the RTP data packet inter-arrival time, measured in

 

 

 

 

 

milliseconds. The value displays as 0 if the connection was set to send-only mode.

 

 

 

 

 

 

Rcvr Codec

 

Type of audio encoding used for the received stream.

 

 

 

 

 

Rcvr Reports Sent1

Number of times the RTCP Receiver Reports have been sent.

 

 

Rcvr Report Time Sent1

Internal time stamp indication when a RTCP Receiver Report was sent.

 

 

Rcvr Packets

 

Total number of RTP data packets received by the phone since starting receiving data on

 

 

 

 

 

this connection. Includes packets received from different sources if this is a multicast call.

 

 

 

 

 

The value displays as 0 if the connection was set to send-only mode.

 

 

 

 

 

 

Rcvr Octets

 

Total number of payload octets received in RTP data packets by the device since starting

 

 

 

 

 

reception on the connection. Includes packets received from different sources if this is a

 

 

 

 

 

multicast call. The value displays as 0 if the connection was set to send-only mode.

 

 

 

 

 

 

MOS LQK

 

Score that is an objective estimate of the mean opinion score (MOS) for listening quality

 

 

 

 

 

(LQK) that rates from 5 (excellent) to 1 (bad). This score is based on audible concealment

 

 

 

 

 

events due to frame loss in the preceding 8-second interval of the voice stream. For more

 

 

 

 

 

information, see the “Monitoring the Voice Quality of Calls” section on page 9-15.

 

 

 

 

 

Note The MOS LQK score can vary based on the type of codec that the

 

 

 

 

 

 

Cisco Unified IP Phone uses.

 

 

 

 

 

 

Avg MOS LQK

 

Average MOS LQK score observed for the entire voice stream.

 

 

 

 

 

 

Min MOS LQK

 

Lowest MOS LQK score observed from start of the voice stream.

 

 

 

 

 

 

Max MOS LQK

 

Baseline or highest MOS LQK score observed from start of the voice stream.

 

 

 

 

 

These codecs provide the following maximum MOS LQK score under normal conditions

 

 

 

 

 

with no frame loss:

 

 

 

 

 

G.711 gives 4.5

 

 

 

 

 

G.722 gives 4.5

 

 

 

 

 

G.728/iLBC gives 3.9

 

 

 

 

 

G.729 A/AB gives 3.8

 

 

 

 

 

MOS LQK Version

Version of the Cisco proprietary algorithm used to calculate MOS LQK scores.

 

 

 

 

 

Cumulative Conceal Ratio

Total number of concealment frames divided by total number of speech frames received

 

 

 

 

 

from start of the voice stream.

 

 

 

 

 

Interval Conceal Ratio

Ratio of concealment frames to speech frames in preceding 3-second interval of active

 

 

 

 

 

speech. If using voice activity detection (VAD), a longer interval might be required to

 

 

 

 

 

accumulate 3 seconds of active speech.

 

 

 

 

 

Max Conceal Ratio

Highest interval concealment ratio from start of the voice stream.

 

 

 

 

 

 

Conceal Secs

 

Number of seconds that have concealment events (lost frames) from the start of the voice

 

 

 

 

 

stream (includes severely concealed seconds).

 

 

 

 

 

Severely Conceal Secs

Number of seconds that have more than 5 percent concealment events (lost frames) from

 

 

 

 

 

the start of the voice stream.

 

 

 

 

 

 

 

 

 

Cisco Unified IP Phone 7962G and 7942G Administration Guide for Cisco Unified Communications Manager 6.1

 

 

 

 

 

 

 

 

 

 

 

 

 

8-12

 

 

 

 

OL-14625-01

 

 

 

 

 

 

 

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Contents Monitoring the Cisco Unified IP Phone Remotely Accessing the Web Page for a Phone ProcedureDisabling and Enabling Web Page Access Choose Device PhoneDevice Information DescriptionUDI Network Configuration Description Vlan PC Vlan Network Statistics OL-14625-01 Device Logs Streaming StatisticsMOS LQK Voice Quality Metrics Related Topics