Cisco Systems 7906G, 7911G manual General Troubleshooting Tips, Problem Possible Cause

Page 194

Chapter 9 Troubleshooting and Maintenance

Troubleshooting Cisco Unified IP Phone Security

Troubleshooting Cisco Unified IP Phone Security

Table 9-1provides troubleshooting information for the security features on the Cisco Unified IP Phone. For information relating to the solutions for any of these issues, and for additional troubleshooting information about security, refer to Cisco Unified CallManager Security Guide.

Table 9-1 Cisco Unified IP Phone Security Troubleshooting

Problem

Possible Cause

 

 

Device authentication error.

CTL file does not have a

 

Cisco Unified CallManager certificate or

 

has an incorrect certificate.

 

 

Phone cannot authenticate CTL file.

The security token that signed the

 

updated CTL file does not exist in the

 

CTL file on the phone.

 

 

Phone cannot authenticate any of the

Invalid TFTP record.

configuration files other than the

 

CTL file.

 

 

 

Phone reports TFTP authorization

• The TFTP address for the phone does

failure.

not exist in the CTL file.

 

• If you created a new CTL file with a

 

new TFTP record, the existing CTL

 

file on the phone may not contain a

 

record for the new TFTP server.

 

 

Phone does not register with

The CTL file does not contain the correct

Cisco Unified CallManager.

information for the

 

Cisco Unified CallManager server.

 

 

Phone does not request signed

The CTL file does not contain any TFTP

configuration files.

entries with certificates.

 

 

General Troubleshooting Tips

This section provides troubleshooting information for some common issues that might occur on the Cisco Unified IP Phone.

 

Cisco Unified IP Phone 7906G and 7911G Administration Guide for Cisco Unified CallManager

9-12

OL-10008-01

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Contents Cisco Unified IP Phone 7906G and 7911G Page Copyright 2006 Cisco Systems, Inc. All rights reserved Page N T E N T S Security Restrictions Safety ViiConfiguring Features, Templates, Services, and Users ViiiPNG File Requirements for Custom Background Images Symptom The Cisco Unified IP Phone Does Not Register with Supporting International Users B-1 Xii Xiii OverviewAudience Organization XivRelated Documentation Appendix C, Technical SpecificationsCisco Unified CallManager Administration Appendix B, Supporting International UsersXvi Obtaining DocumentationCisco.com Xvii Documentation FeedbackProduct Documentation DVD Ordering Documentation Cisco Product Security Overview XviiiXix Reporting Security Problems in Cisco ProductsFor Emergencies only security-alert@cisco.com Obtaining Technical Assistance Cisco Technical Support & Documentation WebsiteXxi Submitting a Service RequestDefinitions of Service Request Severity Obtaining Additional Publications and Information XxiiXxiii Xxiv Document ConventionsConvention Description Xxv Waarschuwing Belangrijke VeiligheidsinstructiesVaroitus Tärkeitä Turvallisuusohjeita Xxvi Warnung Wichtige SicherheitshinweiseAvvertenza Importanti Istruzioni Sulla Sicurezza Aviso Instruções Importantes DE Segurança XxviiVarning! Viktiga Säkerhetsanvisningar XxviiiXxix GEM Disse Anvisninger XxxXxxi Xxxii An Overview Cisco Unified IP Phone Understanding the Cisco Unified IP Phones 7906G and 7911G Cisco Unified IP Phones 7906G and 7911G What Networking Protocols Are Used? Networking Protocol Purpose Usage Notes DhcpSrtp Related Topics What Features are Supported?UDP Feature Overview Related Topic Configuring Telephony FeaturesTelephony Features Available for the Phone, Understanding Security Features for Cisco Unified IP Phones Providing Users with Feature InformationTopic Reference See the Resetting or Restoring Overview of Supported Security FeaturesSee the Troubleshooting Cisco Unified IP Phone Security section onSection on page 3-17 for more information Feature DescriptionConfiguring Security on the Cisco Unified IP Phone Capf Garp Identifying Encrypted and Authenticated Phone CallsDevice Configuration Menu section on Security Restrictions Cisco Unified CallManager Database section on OL-10008-01 Task Purpose For More Information Phone Configuration window CallManager database Services section on See the ConfiguringSee the Setting Up Softkey TemplatesCisco Unified CallManag Installing Cisco Unified IP PhonesSee the Adding Users to Er section onCisco Unified IP Phones See the Providing PowerSee the Installing 7906G and 7911GSecurity on Startup Network SettingsConfiguration Menu Users See Appendix aProviding Information to OL-10008-01 Preparing to Install Cisco Unified IP Phone on Your Network OL-10008-01 Vlan Providing Power to Cisco Unified IP Phones 7906G and 7911G Power OutagePower Type Guidelines Power GuidelinesObtaining Additional Information about Power Understanding Phone Configuration Files URLUnderstanding the Phone Startup Process Step Description Related Topics VlanCisco Unified CallMan Phone Configuration See the UnderstandingAdding Phones to the Cisco Unified CallManager Database Requires MAC Method Address?Adding Phones with Auto-Registration Adding Phones with Auto-Registration and Taps Adding Phones with Cisco Unified CallManager Administration MAC Address of a Cisco Unified IP Phone section onDetermining the MAC Address of a Cisco Unified IP Phone Adding Phones with BATOL-10008-01 Setting Up the Cisco Unified IP Phone Before You BeginHandset, Speaker, Installing the Cisco Unified IP Phone, Network RequirementsCisco Unified CallManager Configuration SafetySetting Up the Cisco Unified IP Phone Before You Begin Handset Network and Access PortsNetwork and Access Ports, Handset, Speaker, Headset, Monitor Mode SpeakerHeadset Activating Group Listen on the PhoneAudio Quality Subjective to User Installing the Cisco Unified IP Phone Connecting a HeadsetProcedure Reference 154887 154389 Cisco Unified IP Phone Model 7906G Cable Connections Cisco Unified IP Phone Model 7911G Cable Connections Before You Begin ProcedureMounting the Phone to a Wall Configuring Startup Network Settings Verifying the Phone Startup ProcessConfiguring Security on the Cisco Unified IP Phone Settings on the Cisco Unified IP PhoneCisco Unified CallManager Administration Guide Related Topic OL-10008-01 Configuring Settings on Cisco Unified IP Phone Displaying a Configuration Menu Unlocking and Locking Options Editing the Values of an Option Setting Overview of Options Configurable from a Phone Network Configuration Menu Category Description OptionNetwork Configuration Menu Option Description To ChangeOption Description To Change CTL File Screen section on To the CTL File Screen section Vlan ID Option Description To Change Option Description To Change PC Vlan Device Configuration Menu CallManager Configuration MenuState Tftp Designation DescriptionSrst Http Configuration Menu URLLocale Configuration Menu UI Configuration Menu Media Configuration MenuEthernet Configuration Menu Security Configuration Menu10 Security Configuration Menu Options QoS Configuration Menu Displaying a Configuration Menu, Network Configuration Menu,Network Configuration Configuring Features, Templates Services, and Users Telephony Features Available for the Phone Feature Description Configuration ReferenceSystem Guide, Understanding Administration Guide, Feature Call CMC FAC System Guide, Call PickupAdministration Guide , Meet-Me McidSystem Guide, Voice Mail MlppButton Templates section on QRTAdministration Guide, Time See the Configuring Softkey Templates section onConfiguring Corporate Directories Configuring Personal DirectoryConfiguring Softkey Templates Modifying Phone Button TemplatesSetting Up Services Adding Users to Cisco Unified CallManager Specifying Options that Appear on the User Options Web Pages OL-10008-01 Customizing Cisco Unified IP Phone Creating Custom Phone RingsRingList.xml File Format Requirements Ring CiscoIPPhoneRingListConfiguring a Custom Phone Ring PCM File Requirements for Custom Ring TypesCreating Custom Background Images List.xml File Format RequirementsList.xml Example Configuring a Custom Background Image PNG File Requirements for Custom Background ImagesOL-10008-01 OL-10008-01 A P T E R Security Configuration Menu CTL File Screen CTL File Information Trust List Screen Model Information Screen MIC Status MenuCTL LSCStatus Messages Screen Press the Applications Menu buttonStatus Message Description Possible Explanation and Action CallManager Administration section onNetwork Configuration Menu section Adding Phones with Cisco UnifiedConfiguration Menu section on AddressAddress. See the Network Configuration Menu section on page 4-7 section forSection on page 7-19 to verify the phone Network Configuration Menu section onPhone. See the Firmware Versions Screen See the Network Configuration Menu Section on page 4-7 section for detailsOn page 4-7for details on assigning a Network Statistics Screen Select Network Statistics PC port is in a link up state and has auto-negotiated Firmware Versions Screen OL-10008-01 Monitoring the Cisco Unified IP Phone Remotely Accessing the Web Page for a Phone Device Logs, Streaming Statistics,Disabling Web Page Access Device Information Monitoring the Cisco Unified IP Phone Remotely UDI Network Configuration Description Description Description Description Network Statistics Ethernet Information Area Items OL-10008-01 Device Logs Streaming Statistics Streaming Statistics OL-10008-01 Troubleshooting and Maintenance Resolving Startup Problems Troubleshooting and Maintenance Resolving Startup Problems Identifying Error Messages Verifying Tftp Server Settings Verifying DNS Settings Creating a New Configuration File Cisco Unified IP Phone Resets Unexpectedly Identifying Intermittent Network Outages Verifying Dhcp SettingsVerifying Physical Connection Checking Static IP Address Settings Verifying Voice Vlan ConfigurationEliminating DNS or Other Connectivity Errors General Troubleshooting Tips Problem Possible CauseSummary Explanation Unlocking and Locking Options section on page 4-3 for HalfduxcollisionexceedthresholdOperation Performing Explanation Performing a Basic ResetPerforming a Basic Reset, Performing a Factory Reset, Unlocking and Locking Options Performing a Factory ResetLocking Options section on Section on page 4-3 . The pressUsing the Quality Report Tool Cleaning the Cisco Unified IP Phone Where to Go for More Troubleshooting InformationProviding Information to Users How Users Obtain Support for the Cisco Unified IP PhoneHow Users Subscribe to Services and Configure Phone Features How Users Get Copies of Cisco Unified IP Phone ManualsHow Users Access a Voice Messaging System Cisco Unified CallManager section onHow Users Configure Personal Directory Entries Supporting International Users Appendix B Supporting International Users Technical Specifications Specification Value or RangeNetwork Port Connector Cable SpecificationsNetwork and Access Port Pinouts Pin Number FunctionAccess Port Connector RD+OL-10008-01 Numerics IN-1IN-2 IN-3 IN-4 IN-5 IN-6 IN-7 IN-8 IN-9 IN-10 IN-11 Wall mounting Web Access Enabled 4-22web IN-12Page USA
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7906G, 7911G specifications

The Cisco Systems 7911G is a versatile IP phone designed to enhance communication in enterprise environments. Targeting workers in various organizational settings, this model is known for its reliability, ease of use, and robust features that cater to both basic and advanced telephony requirements.

One of the key features of the Cisco 7911G is its support for Voice over IP (VoIP) technology. Using this technology allows for the transmission of voice signals over the internet rather than through traditional telephone lines. This not only reduces telephony costs but also offers enhanced functionality that integrates seamlessly with existing communication systems.

The phone is equipped with a monochrome graphical display that provides users with clear visibility of their call status, directory information, and menu options. With a resolution of 128x64 pixels, the screen is large enough to offer important information without overwhelming the user. This simplicity makes it an ideal choice for users who require straightforward functionality without the complexity of advanced features.

Ergonomically designed, the Cisco 7911G features a comfortable keypad with dedicated buttons for frequently used functions such as mute, hold, and transfer. It supports multiple lines, providing users with the ability to manage multiple calls simultaneously. Additionally, it offers programmable line keys that can be customized for speed dial or as soft keys for quick access to features.

The device supports Power over Ethernet (PoE), which allows the phone to receive power through the network cable rather than needing a separate power source. This feature not only simplifies installation but also enhances mobility within the workspace, as it reduces cable clutter.

Another significant characteristic of the Cisco 7911G is its compatibility with Cisco Unified Communications Manager, which ensures centralized management of telephony systems. It also supports a range of audio codecs that help in delivering high-quality audio during calls, reducing latency and improving overall communication quality.

Security is also a focus with the Cisco 7911G, as it features a secure access feature that includes Transport Layer Security (TLS) and Secure Real-Time Transport Protocol (SRTP) for encrypted voice communications. This ensures that sensitive conversations are protected from eavesdropping.

Overall, the Cisco Systems 7911G is a reliable, feature-rich IP phone that provides an excellent solution for organizations looking to upgrade their communication systems. Its combination of user-friendly design, powerful integrations, and security features makes it a cornerstone in the suite of Cisco telecommunications solutions.
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