Cisco Systems 7970G manual OL-11524-01

Chapter 7 Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phone

Call Statistics Screen

Table 7-5	Call Statistics (continued)
Item		Description
MOS LQK Version		Version of the Cisco proprietary algorithm used to calculate MOS LQK
		scores.
Cumulative Conceal		Total number of concealment frames divided by total number of speech
Ratio		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.
Latency1		Estimate of the network latency, expressed in milliseconds. Represents a
		running average of the round-trip delay, measured when RTCP receiver
		report blocks are received.
Max Jitter		Maximum value of instantaneous jitter, in milliseconds.
Sender Size		RTP packet size, in milliseconds, for the transmitted stream.
Rcvr Size		RTP packet size, in milliseconds, for the received stream.
Rcvr Discarded		RTP packets received from network but discarded from jitter buffers.

1. When the RTP Control Protocol is disabled, no data generates for this field and thus displays as 0.

	Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones
7-18	OL-11524-01