Cisco Systems OL-19025-01 manual General Troubleshooting Tips, Checking Power Connection

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Chapter 9 Troubleshooting and Maintenance

General Troubleshooting Tips

Step 4 From Cisco Unified Communications Manager, choose System > Server and verify that the server is referred to by its IP address and not by its DNS name.

Step 5 From Cisco Unified Communications Manager, choose Device > Phone > Find and verify that you have assigned the correct MAC address to this Cisco Unified IP Phone. For information about determining a MAC address, see the “Determining the MAC Address for a Cisco Unified IP Phone” section on page 2-10.

Step 6 Power cycle the phone.

Checking Power Connection

In most cases, a phone will restart if it powers up by using external power but loses that connection and switches to PoE. Similarly, a phone may restart if it powers up by using PoE and then gets connected to an external power supply.

General Troubleshooting Tips

Table 9-1provides general troubleshooting information for the Cisco Unified IP Phone.

Table 9-1

Cisco Unified IP Phone Troubleshooting

 

 

 

 

 

 

Summary

 

 

Explanation

 

 

 

 

 

Connecting a Cisco Unified IP Phone to

 

Cisco does not support connecting an IP phone to another IP phone through the

 

another Cisco Unified IP Phone/

 

PC port. Each IP phone should directly connect to a switch port. If phones are

 

 

 

 

connected together in a line (by using the PC port), the phones will not work.

 

 

 

 

 

Poor quality when calling digital cell

 

In Cisco Unified Communications Manager, you can configure the network to

 

phones using the G.729 protocol.

 

use the G.729 protocol (the default is G.711). When using G.729, calls between

 

 

 

 

an IP phone and a digital cellular phone will have poor voice quality. Use G.729

 

 

 

 

only when absolutely necessary.

 

 

 

 

 

Prolonged broadcast storms cause

 

A prolonged Layer 2 broadcast storm (lasting several minutes) on the voice

 

IP phones to reset, or be unable to make or

 

VLAN may cause IP phones to reset, lose an active call, or be unable to initiate

 

answer a call.

 

 

or answer a call. Phones may not come up until a broadcast storm ends.

 

 

 

 

 

Moving a network connection from the

 

If you are powering your phone through the network connection, you must be

 

phone to a workstation.

 

careful if you decide to unplug the phone’s network connection and plug the

 

 

 

 

cable into a desktop computer.

 

 

 

 

 

 

 

 

 

 

 

Caution The computer’s network card cannot receive power through the

 

 

 

 

 

 

network connection; if power comes through the connection, the

 

 

 

 

 

 

network card can be destroyed. To protect a network card, wait 10

 

 

 

 

 

 

seconds or longer after unplugging the cable from the phone before

 

 

 

 

 

 

plugging it into a computer. This delay gives the switch enough time

 

 

 

 

 

 

to recognize that there is no longer a phone on the line and to stop

 

 

 

 

 

 

providing power to the cable.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cisco Unified IP Phone 6921, 6941, and 6961 Administration Guide for Cisco Unified Communications Manager 7.1 (SCCP)

9-8

OL-19025-01

 

 

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Contents Americas Headquarters Text Part Number OL-19025-01Page Page Page N T E N T S Footstand Configuring Features, Templates, Services, and Users Troubleshooting and Maintenance Network and Access Port Pinouts C-2 OL-19025-01 Organization OverviewAudience Chapter DescriptionRelated Documentation Cisco Unified IP Phone 6900 SeriesConvention Description Document ConventionsCisco Product Security Overview Boldface fontItalic screen font An Overview of the Cisco Unified IP Phone Understanding the Cisco Unified IP Phone 6921, 6941, Buttons 2shows the main components of the Cisco Unified IP Phone OL-19025-01 OL-19025-01 3shows the main components of the Cisco Unified IP Phone OL-19025-01 Networking Protocol Purpose Usage Notes Dynamic Host Configuration Protocol chapterWhat Networking Protocols are Used? Communications Manager System GuideRelated Topics Cisco Unified Communications ManagerSystem Guide Feature Overview Related Topic Configuring Telephony FeaturesProviding Users with Feature Information Feature Description Access section onOL-19025-01 Purpose For More Information Communications Manager Administration Guide Unified Communications Manager AdministrationChapter in the Cisco Unified Communications Manager Communications Manager AdministrationTask Purpose For More Information Installing Cisco Unified IP Phones User Guide for Cisco Unified Communications Manager Network Setup IPv4 SetupRefer to Cisco Unified IP Phone 6921, 6941, User Guide Administration and System Guides Terminology DifferencesA P T E R Related Topic Providing Power to the Cisco Unified IP Phone Understanding the Phone Startup Process, Network Setup Menu,Power Type Guidelines Power GuidelinesPower Outage Understanding Phone Configuration Files Obtaining Additional Information about PowerPurpose Related Topics Resolving Startup Problems,Understanding the Phone Startup Process Adding Phones to the Cisco UnifiedRequesting the Configuration File Adding Phones with Auto-Registration Requires MAC Method Address?Adding Phones with Auto-Registration and Taps Determining the MAC Address for a Cisco Unified IP Phone Adding Phones with BATBefore You Begin Network RequirementsNetwork and Access Ports, Handset, Speakerphone, Headset, Cisco Unified Communications Manager ConfigurationNetwork and Access Ports Headset HandsetSpeakerphone Audio Quality See the Headset section on page 3-3for supported Installing the Cisco Unified IP PhoneSee the Network and Access Ports section on See the Adding Phones to the Cisco UnifiedCisco Unified IP Phone 6921 and 6941 Cable Connections Cisco Unified IP Phone 6961 Cable Connections Reducing Power Consumption on the Phone FootstandCisco Unified IP Phone 6921 Cisco Higher Viewing Angle Lower Viewing Angle Mounting the Phone to the WallVerifying the Phone Startup Process Configuring Startup Network Settings Hold Mute SpeakerOL-19025-01 Configuration Menus on the Cisco Unified IP Phone PhoneSelect Admin Settings Displaying a Configuration MenuProcedure Unlocking and Locking Options Editing ValuesSelect Network Setup MenuOption Description To Change PC Vlan IPv4 Setup Menu Options Related Topics OL-19025-01 Configuring Features, Templates, Services, and Users Feature Description Configuration Reference Administration Guide, Directory Features and Services Guide, Cisco CallFeatures and Services Guide, Call Forward Maximum Hop Count service parameterCisco Unified Communications Codes and Forced Authorization Codes Communications Features and ServicesCommunications Manager Features Extension Mobility chapter in the CiscoPoint Configuration chapter in the Cisco Speed Dials, Features and Services GuideButton Template for Personal Address Book or Cisco Communications Manager Administration Guide, Hunt GroupManager Feature and Services Guide Refer to Cisco Unified Communications Features and Services Guide, MaliciousAdministration Guide, Message Waiting Manager System Guide, Cisco UnifiedFeatures and Services Guide Barge Unified IP Phone 6921, 6941, and 6961 UserFeatures and Services Guide, Quality Administration Guide, Phone ButtonTemplate Configuration chapter Report Tool chapterPort Configuration chapter Administration Guide, Time PeriodAdministration Guide, Cisco Voice-Mail System Guide, Time-of-Day RoutingJoin and Direct Transfer Policy Configuring Corporate and Personal DirectoriesConfiguring Corporate Directories Configuring Personal Directory Modifying Phone Button TemplatesClick Save Configuring Softkey Templates Supported as a DNDSetting Up Services Giving Users Access to the User Options Web Pages Managing the User Options Web PagesClick Save Selected/Changes Click Add SelectedEnter the appropriate search criteria and click Find Specifying Options that Appear on the User Options Web Pages Configuring the Phone to Support Call Waiting Customizing and Modifying Configuration Files Customizing the Cisco Unified IP PhoneCreating Custom Phone Rings DistinctiveRingList File Format RequirementsPCM File Requirements for Custom Ring Types Configuring the Idle DisplayConfiguring a Custom Phone Ring Automatically Disabling the Cisco Unified IP Phone Backlight Field Description OL-19025-01 Model Information Screen Model Information Screen, Status Menu,Select Status Messages Status MenuStatus Messages Screen Message Description Possible Explanation and Action Network Setup Menu section on Menu section on page 4-4for detailsSetup Menu section on page 4-4for details on Network Statistics Screen Select Status Network Statistics Call Statistics Screen Select Call Statistics Voice Quality MetricsOL-19025-01 Monitoring the Cisco Unified IP Phone Remotely Accessing the Web Page for a Phone Http//IPaddressChoose Device Phone Disabling and Enabling Web Page AccessDevice Information Network Setup Cisco Unified IP PhoneDescription Description Network Statistics VlanDevice Logs Streaming Statistics Configuring Settings on the Cisco Unified IP Phone chapter Troubleshooting and Maintenance Resolving Startup ProblemsTroubleshooting and Maintenance Resolving Startup Problems Identifying Error Messages Verifying DNS Settings Choose Tools Control Center Feature ServicesSymptom Cisco Unified IP Phone Unable to Obtain IP Address Verifying the Physical Connection Cisco Unified IP Phone Resets UnexpectedlyVerifying Dhcp Settings Identifying Intermittent Network OutagesVerifying that the Phones Have Not Been Intentionally Reset Checking Static IP Address SettingsVerifying the Voice Vlan Configuration Eliminating DNS or Other Connectivity ErrorsSummary Explanation General Troubleshooting TipsChecking Power Connection Halfduxcollisionexceedthreshold Operation Performing Explanation Resetting or Restoring the Cisco Unified IP PhonePerforming a Basic Reset Performing a Factory Reset Monitoring the Voice Quality of CallsMetric Change Condition Where to Go for More Troubleshooting InformationTroubleshooting Tips Cleaning the Cisco Unified IP Phone OL-19025-01 Providing Information to Users Via a Website How Users Access a Voice Messaging System How Users Configure Personal Directory Entries Installing the SynchronizerConfiguring the Synchronizer Supporting International Users Support for International Call LoggingOL-19025-01 Physical and Operating Environment Specifications Specification Value or RangeNetwork Port Connector Cable SpecificationsNetwork and Access Port Pinouts Access Port ConnectorPin Number Function OL-19025-01 Basic Phone Administration Steps Example User Information for these ProceduresAdding a User to Cisco Unified Communications Manager Click Perform Full Sync Now Adding a User From an External Ldap DirectoryChoose System Ldap Ldap Directory Example johndoeConfiguring the Phone Proceed to the section Configuring the Phone, page D-4OL-19025-01 OL-19025-01 Choose User Management End User Click Device AssociationsPerforming Final End User Configuration Steps Installing the Wall Mount Kit for Installing the Bracket Figure E-2 Mounting the Wall Bracket Figure E-3 Attaching the Phone Bracket Figure E-4 Preparing the Handset Hook Figure E-5 Attaching the Cables Figure E-6 Attaching the Phone to the Wall Bracket OL-19025-01 Cisco Unified IP Phone Non-Lockable Wall Mount ADA Non-Lockable Wall Mount Kit for 6900 SeriesComponents Package includes these itemsInstall Non-Lockable Wall Mount Kit for Phone Before You BeginFigure F-4 Mount the Wall Bracket Figure F-5 Attach Phone Bracket Go to in Installing the Bracket, page E-2 Remove Phone from Non-Lockable Wall MountBefore You Begin Figure F-7Figure F-8 D E IN-2 IN-3 IN-4 Tftp Server IN-6 IN-7 IN-8
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