Cisco 8800 Series Guida

Maintenance

•Basic Reset, on page 1

•Perform Network Configuration Reset, on page 3

•Perform User Network Configuration Reset, on page 3

•Remove CTL File, on page 3

•Quality Report Tool, on page 4

•Voice Quality Monitoring, on page 4

•Cisco IP Phone Cleaning, on page 5

Basic Reset

Performing a basic reset of a Cisco IP Phone provides a way to recover if the phone experiences an error and

provides a way to reset or restore various configuration and security settings.

The following table describes the ways to perform a basic reset. You can reset a phone with any of these

operations after the phone has started up. Choose the operation that is appropriate for your situation.

Table 1: Basic Reset Methods

ExplanationActionOperation

Resets any user and network setup

changes that you have made, but

that the phone has not written to its

Flash memory, to previously saved

settings, then restarts the phone.

Press Applications . Go to

Adminsettings>Resetsettings>

Reset device.

Restart phone

Resets user and network setup

settings to their default values, and

restarts the phone.

To reset settings, press

Applications and choose

Administrator Settings >Reset

Settings >Network.

Reset settings

Resets the CTL file.To reset the CTL file, press

Applications and choose

Administrator Settings >Reset

Settings >Security.

Maintenance

Reset the Phone to the Factory Settings from the Phone Keypad

You can reset the phone to the factory settings. The reset clears all the phone parameters.

Procedure

Step 1 Remove power from the phone in one of these ways:

• Unplug the power adapter.

• Unplug the LAN cable.

Step 2 Wait 5 seconds.

Step 3 Press and hold #and plug the phone back in.

Step 4 When the Headset and Speaker buttons are lit, release #and enter the following key sequence:

123456789*0#

The light for the Headset button turns off after you press the 1key. After you enter the key sequence, the

Mute button lights.

Do not power down the phone until it completes the factory reset process, and the main screen

appears.

Caution

The phone resets.

Perform Reset All Settings from Phone Menu

Perform this task if you want to reset your user and network setup settings to the default values.

Procedure

Step 1 Press Applications .

Step 2 Choose Administrator settings >Reset settings >All settings.

If necessary, unlock the phone options.

Related Topics

Apply a Phone Password

Reboot Your Phone from the Backup Image

Your Cisco IP Phone has a second, backup image that allows you to recover the phone when the default image

has been compromised.

To reboot your phone from the backup image, perform the following procedure.

Maintenance

Reset the Phone to the Factory Settings from the Phone Keypad

Procedure

Step 1 Disconnect the power supply.

Step 2 Press and hold the star (*) key.

Step 3 Reconnect the power. Continue pressing the star key until the Mute LED turns off.

Step 4 Release the star key.

The phone reboots from the backup image.

Perform Network Configuration Reset

Resets network configuration settings to their default values and resets the phone. This method causes DHCP

to reconfigure the IP address of the phone.

Procedure

Step 1 From the Administrator Settings menu, if required, unlock phone options.

Step 2 Choose Reset Settings >Network Setup.

Related Topics

Apply a Phone Password

Perform User Network Configuration Reset

Resets any user and network configuration changes that you have made, but that the phone has not written to

flash memory, to previously saved settings.

Procedure

Step 1 From the Administrator Settings menu, if required, unlock phone options.

Step 2 Choose Reset Settings >Reset Device.

Related Topics

Apply a Phone Password

Remove CTL File

Deletes only the CTL file from the phone.

Maintenance

Perform Network Configuration Reset

Procedure

Step 1 From the Administrator Settings menu, if required, unlock phone options.

Step 2 Choose Reset Settings >Security Settings.

Related Topics

Apply a Phone Password

Quality Report Tool

The Quality Report Tool (QRT) is a voice quality and general problem-reporting tool for the Cisco IP Phone.

The QRT feature is installed as part of Cisco Unified Communications Manager installation.

You can configure user Cisco IP Phones with QRT. When you do so, users can report problems with phone

calls by pressing Report Quality. This softkey or button is available only when the Cisco IP Phone is in the

Connected, Connected Conference, Connected Transfer, or OnHook states.

When a user presses Report Quality, a list of problem categories appears. The user selects the appropriate

problem category, and this feedback is logged in an XML file. Actual information that is logged depends on

the user selection and whether the destination device is a Cisco IP Phone.

For more information about using QRT, see the documentation for your particular Cisco Unified

Communications Manager release.

Related Topics

Cisco Unified Communications Manager Documentation

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

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.

Concealment ratio and concealment seconds are primary measurements based on frame loss. A Conceal Ratio

of zero indicates that the IP network is delivering frames and packets on time with no loss.

Note

You can access voice quality metrics from the Cisco IP Phone using the Call Statistics screen or remotely by

using Streaming Statistics.

Maintenance

Quality Report Tool

Voice Quality Troubleshooting Tips

When you observe significant and persistent changes to metrics, use the following table for general

troubleshooting information.

Table 2: Changes to Voice Quality Metrics

ConditionMetric Change

Network impairment from packet loss or high jitter.Conceal Ratio and Conceal Seconds increase

significantly

• Noise or distortion in the audio channel such as

echo or audio levels.

• Tandem calls that undergo multiple

encode/decode such as calls to a cellular network

or calling card network.

•Acoustic problems coming from a speakerphone,

handsfree cellular phone or wireless headset.

Check packet transmit (TxCnt) and packet receive

(RxCnt) counters to verify that voice packets are

flowing.

Conceal Ratio is near or at zero, but the voice quality

is poor.

Network impairment from packet loss or high jitter

levels:

• Average MOS LQK decreases may indicate

widespread and uniform impairment.

• Individual MOS LQK decreases may indicate

bursty impairment.

Cross-check the conceal ratio and conceal seconds

for evidence of packet loss and jitter.

MOS LQK scores decrease significantly

• Check to see if the phone is using a different

codec than expected (RxType and TxType).

• Check to see if the MOS LQK version changed

after a firmware upgrade.

MOS LQK scores increase significantly

Voice quality metrics do not account for noise or distortion, only frame loss.

Note

Cisco IP Phone Cleaning

To clean your Cisco IP Phone, use only a dry soft cloth to gently wipe the phone and the phone screen. Do

not apply liquids or powders directly to the phone. As with all non-weatherproof electronics, liquids and

powders can damage the components and cause failures.

Maintenance

Voice Quality Troubleshooting Tips

When the phone is in sleep mode, the screen is blank and the Select button is not lit. When the phone is in

this condition, you can clean the screen, as long as you know that the phone will remain asleep until after you

finish cleaning.

Maintenance

Cisco IP Phone Cleaning

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