Cisco 8831NR Administration Manual page 120

Display Call Statistics Screen
Item
Severely Conceal Secs
Latency
Display Call Statistics Screen
To display the Call Statistics screen for information about the last voice stream, follow these steps:
Procedure
Step 1
Press Settings.
Step 2 Select Status.
Step 3
Select Call Statistics.
Cisco Unified IP Conference Phone 8831 and 8831NR Administration Guide
110
Model Information, Status, and Statistics
Description
Number of seconds that have more than 5 percent concealment
events (lost frames) from the start of the voice stream.
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.