Cisco Systems 6921 Security Configuration, Mos Lqk, Voice stream, Cisco Unified IP Phone uses

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Table 7-4 Call Statistics Items for the Cisco Unified Phone 6900 Series (continued)

Item	Description
Interval Conceal	Ratio of concealment frames to speech frames in preceding 3-second interval of
Ratio	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	Number of seconds that have more than 5 percent concealment events (lost
Secs	frames) from the start of the voice stream.
Latency	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.
MOS LQK	Objective estimate of the Mean Opinion Score (MOS) for Listening Quality
	(LQK) that ranks audio quality from 5 (excellent) to 1 (bad). This score is based
	on audible-concealment events due to a frame loss in the preceding 8 seconds of
	the voice stream.
	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 for the entire voice stream.
Min MOS LQK	Lowest MOS LQK score from the start of the voice stream.
Max MOS LQK	Baseline or highest MOS LQK score from the start of the voice stream.
	The following codecs provide the corresponding maximum MOS LQK scores
	under normal conditions with no frame loss:
	•	G.711: 4.5
	•	G.722: 4.5
	•	G.728/iLBC: 3.9
	•	G729A/AB: 3.7
MOS LQK Version	Version of the Cisco-proprietary algorithm used to calculate the MOS LQK
	scores.

Security Configuration

To display the Security Configuration screen, follow these steps.

Procedure

Step 1 Press the Applications button.

Step 2 Select Admin Settings.

Step 3 Select Security.

For more information, refer “Configuring Security on the Cisco Unified IP Phone” section on page 3-15.

	Cisco Unified IP Phone 6921, 6941, 6945, and 6961 Administration Guide for Cisco Unified Communications Manager 8.5 (SCCP and SIP)
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