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Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)
OL-23091-01
Chapter 8 Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phones
Status Menu
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:
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.
Latency
1
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.
Table 8-6 Call Statistics Items (continued)
Item Description
