Cisco Systems 8.6 manual Using Test Tone

Chapter 8 Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phones

Status Menu

Table 8-6	Call Statistics Items (continued)
Item		Description
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.
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.
Network Protocol		Identifies the current Network Protocol.

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

Using Test Tone

The Cisco Unified IP Phone supports a “test tone,” which allows you to troubleshoot echo on a call as well as to test low volume levels.

To use a test tone you must:

•Enable the tone generator.

•Create a test tone.

To enable the tone generator, follow these steps:

	Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)
8-16	OL-23091-01