Remove Ctl File; Voice Quality Monitoring - Cisco Unified IP Phone 8941 Administration Manual

Procedure
Step 1 From the Administrator Settings menu, if required, unlock phone options.
Step 2 Choose Reset Settings > Network Settings.
Related Topics
Apply a Phone Password, on page 31

Remove CTL File

Deletes only the CTL file from the phone.
Procedure
Step 1
From the Admin Settings menu, if required, unlock phone options.
Step 2 Choose Reset Settings > Security .
Related Topics
Apply a Phone Password, on page 31

Voice Quality Monitoring

To measure the voice quality of calls that are sent and received within the network, Cisco IP Phones use these
statistical metrics that are based on concealment events. The DSP plays concealment frames to mask frame
loss in the voice packet stream.
• Concealment Ratio metrics—Show the ratio of concealment frames over total speech frames. An interval
• Concealed Second metrics—Show the number of seconds in which the DSP plays concealment frames
Concealment ratio and concealment seconds are primary measurements based on frame loss. A Conceal
Note
Ratio of zero indicates that the IP network is delivering frames and packets on time with no loss.
You can access voice quality metrics from the Cisco IP Phone using the Call Statistics screen or remotely by
using Streaming Statistics.
conceal ratio is calculated every 3 seconds.
due to lost frames. A severely "concealed second" is a second in which the DSP plays more than five
percent concealment frames.
Cisco Unified IP Phone 8941 and 8945 Administration Guide for Cisco Unified Communications Manager 10.0 (SCCP
Voice Quality Monitoring
and SIP)
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