Using The Quality Report Tool; Monitoring The Voice Quality Of Calls - Cisco 7975G Administration Manual

Chapter 9 Troubleshooting and Maintenance
•
To perform a factory reset of a phone, perform the following steps:
Procedure
Step 1 Unplug the power cable from the phone and then plug it back in.
The phone begins its power up cycle.
While the phone is powering up, and before the Speaker button flashes on and off, press and hold #.
Step 2
Continue to hold # until each line button flashes on and off in sequence in orange.
Release # and press 123456789*0#.
Step 3
You can press a key twice in a row, but if you press the keys out of sequence, the factory reset will not
take place.
After you press these keys, the line buttons on the phone flash orange and then green, and the phone goes
through the factory reset process. This process can take several minutes.
Do not power down the phone until it completes the factory reset process and the main screen appears.

Using the Quality Report Tool

The Quality Report Tool (QRT) is a voice quality and general problem-reporting tool for the
Cisco Unified IP Phone. The QRT feature is installed as part of the Cisco Unified Communications
Manager installation.
You can configure users' Cisco Unified IP Phones with QRT. When you do so, users can report problems
with phone calls by pressing the QRT softkey. This softkey is available only when the
Cisco Unified IP Phone is in the Connected, Connected Conference, Connected Transfer, and/or
OnHook states.
When a user presses the QRT softkey, a list of problem categories appears. The user selects the
appropriate problem category and this feedback is logged in an XML file. Actual information logged
depends on the user selection and whether the destination device is a Cisco Unified IP Phone.
For more information about using QRT, refer to Cisco Unified Communications Manager Features and
Services Guide.

Monitoring the Voice Quality of Calls

To measure the voice quality of calls that are sent and received within the network, Cisco Unified 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.
•
•
OL-12642-01
The term75.default.loads file and the files specified in that file should be available on the TFTP
server that is specified by the DHCP packet.
Concealment Ratio metrics—Show the ratio of concealment frames over total speech frames. An
interval conceal ratio is calculated every 3 seconds.
Concealed Second metrics—Show the number of seconds in which the DSP plays concealment
frames 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 7975G Administration Guide for Cisco Unified Communications Manager 6.0
Using the Quality Report Tool
9-17