Cisco Systems OL-14625-01 manual Mos Lqk

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
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