Cisco IP Phone Administration Guide for Cisco CallManager 4.0

Cisco IP Phone Administration Guide for Cisco CallManager 4.0 Cisco IP Phone Models 7960G and 7940G Corporate Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA http://www.cisco.com Tel: 408 526-4000 800 553-NETS (6387) Fax: 408 526-4100 Text Part Number:

THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF ANY PRODUCTS. THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY. The following information is for FCC compliance of Class A devices: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio-frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users will be required to correct the interference at their own expense. The following information is for FCC compliance of Class B devices: The equipment described in this manual generates and may radiate radio-frequency energy. If it is not installed in accordance with Cisco s installation instructions, it may cause interference with radio and television reception. This equipment has been tested and found to comply with the limits for a Class B digital device in accordance with the specifications in part 15 of the FCC rules. These specifications are designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation. Modifying the equipment without Cisco s written authorization may result in the equipment no longer complying with FCC requirements for Class A or Class B digital devices. In that event, your right to use the equipment may be limited by FCC regulations, and you may be required to correct any interference to radio or television communications at your own expense. You can determine whether your equipment is causing interference by turning it off. If the interference stops, it was probably caused by the Cisco equipment or one of its peripheral devices. If the equipment causes interference to radio or television reception, try to correct the interference by using one or more of the following measures: Turn the television or radio antenna until the interference stops. Move the equipment to one side or the other of the television or radio. Move the equipment farther away from the television or radio. Plug the equipment into an outlet that is on a different circuit from the television or radio. (That is, make certain the equipment and the television or radio are on circuits controlled by different circuit breakers or fuses.) Modifications to this product not authorized by Cisco Systems, Inc. could void the FCC approval and negate your authority to operate the product. The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of California, Berkeley (UCB) as part of UCB s public domain version of the UNIX operating system. All rights reserved. Copyright 1981, Regents of the University of California. NOTWITHSTANDING ANY OTHER WARRANTY HEREIN, ALL DOCUMENT FILES AND SOFTWARE OF THESE SUPPLIERS ARE PROVIDED AS IS WITH ALL FAULTS. CISCO AND THE ABOVE-NAMED SUPPLIERS DISCLAIM ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, THOSE OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE. IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING, WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF CISCO OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

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CONTENTS Preface xi Overview xi Audience xi Objectives xii Organization xii Related Documentation xiii Obtaining Documentation xiv Cisco.com xiv Ordering Documentation xv Documentation Feedback xv Obtaining Technical Assistance xvi Cisco TAC Website xvi Opening a TAC Case xvi TAC Case Priority Definitions xvii Obtaining Additional Publications and Information Document Conventions xix xvii CHAPTER 1 An Overview of the Cisco IP Phone 1-1 Understanding the Cisco IP Phone Models 7960G and 7940G 1-2 What Networking Protocols Are Used? 1-5 What Features are Supported on the Cisco IP Phone Models 7960G and 7940G? 1-7 Feature Overview 1-7 Configuring Telephony Features 1-8 v

Contents Configuring Network Features Using the Cisco IP Phone 1-9 Providing Users with Feature Information 1-9 Understanding Security Features for Cisco IP Phones 1-10 Overview of Supported Security Features 1-11 Understanding the Requirements for Installing and Configuring the Cisco IP Phone Models 7960G and 7940G 1-13 CHAPTER 2 Preparing to Install the Cisco IP Phone on Your Network 2-1 Understanding Interactions with Other Cisco IP Telephony Products 2-2 Understanding How the Cisco IP Phone Interacts with Cisco CallManager 2-2 Understanding How the Cisco IP Phone Interacts with the Cisco Catalyst Family of Switches 2-3 Understanding the Phone Startup Process 2-4 Understanding Phone Configuration Files 2-7 Providing Power to the Cisco IP Phone 2-8 Power Source Design 2-9 Redundancy Feature 2-9 Adding Phones to the Cisco CallManager Database 2-10 Adding Phones with Auto-Registration 2-11 Adding Phones with Auto-Registration and TAPS 2-12 Adding Phones with Cisco CallManager Administration 2-13 Adding Phones with BAT 2-14 Configuring the Cisco IP Phone 7960G to Support the Cisco IP Phone 7914 Expansion Module 2-14 CHAPTER 3 Setting Up the Cisco IP Phone 3-1 Before You Begin 3-1 Network Requirements 3-2 Cisco CallManager Configuration 3-2 vi

Contents Network and Access Ports 3-3 Handset 3-3 Headset 3-3 Speakerphone 3-4 Safety and Performance 3-4 Safety 3-4 Using External Devices with Your Cisco IP Phone 3-5 Installing the Cisco IP Phone 3-6 Adjusting Placement of the Cisco IP Phone 3-9 Adjusting Cisco IP Phone Placement on the Desktop 3-10 Mounting the Phone to the Wall 3-10 Verifying the Phone Startup Process 3-12 Configuring Startup Network Settings 3-13 Configuring Security on the Cisco IP Phone 3-13 CHAPTER 4 Configuring Network Settings on the Cisco IP Phone 4-1 Displaying the Network Configuration Menu 4-2 Unlocking and Locking Options on the Network Configuration Menu 4-2 Guidelines for Editing Settings on the Network Configuration Menu 4-3 Overview of Network Configuration Options 4-4 Network Configuration Menu Options 4-6 CHAPTER 5 Configuring Features, Templates, Services, and Users 5-1 Configuring Telephony Features Using Cisco CallManager 5-2 Creating Custom Phone Rings 5-6 Configuring Corporate and Personal Directories 5-7 Configuring Corporate Directories 5-7 Configuring Personal Directory 5-7 vii

Contents Modifying Phone Button Templates 5-8 Configuring Softkey Templates 5-9 Setting Up Services 5-10 Adding Users to Cisco CallManager 5-11 CHAPTER 6 Viewing Model Information, Status, and Statistics, on the Cisco IP Phone 6-1 Model Information Screen 6-2 Status Menu 6-3 Status Messages Screen 6-3 Network Statistics Screen 6-10 Firmware Versions Screen 6-12 Expansion Module Stats Screen 6-12 Call Statistics Screen 6-13 CHAPTER 7 Monitoring the Cisco IP Phone Remotely 7-1 Accessing the Web Page for a Phone 7-2 Disabling Web Page Access 7-3 Device Information 7-4 Network Configuration 7-5 Network Statistics 7-10 Ethernet Statistics 7-10 Port 1 (Network), Port 2 (Access), and Port 3 (Phone) Statistics 7-12 Device Logs 7-15 Debug Display 7-16 Stack Statistics 7-17 Status Messages 7-18 Streaming Statistics 7-18 viii

Contents CHAPTER 8 Troubleshooting the Cisco IP Phone 8-1 Resolving Startup Problems 8-2 Symptom: The Cisco IP Phone Does Not Go Through its Normal Startup Process 8-2 Symptom: The Cisco IP Phone Does Not Register with Cisco CallManager 8-3 Identifying Error Messages 8-4 Registering the Phone with Cisco CallManager 8-4 Checking Network Connectivity 8-4 Verifying TFTP Server Settings 8-5 Verifying IP Addressing and Routing 8-5 Verifying DNS Settings 8-6 Verifying Cisco CallManager Settings 8-6 Cisco CallManager and TFTP Services Are Not Running 8-6 Creating a New Configuration File 8-7 Symptom: Cisco IP Phone Resets Unexpectedly 8-8 Verifying Physical Connection 8-9 Identifying Intermittent Network Outages 8-9 Verifying DHCP Settings 8-9 Checking Static IP Address Settings 8-9 Verifying Voice VLAN Configuration 8-10 Verifying that the Phones Have Not Been Intentionally Reset 8-10 Eliminating DNS or Other Connectivity Errors 8-11 Troubleshooting Cisco IP Phone Security 8-12 General Troubleshooting Tips for the Cisco IP Phone 8-13 General Troubleshooting Tips for the Cisco IP Phone 7914 Expansion Module 8-17 Cleaning the Cisco IP Phone 8-17 ix

Contents Resetting or Restoring the Cisco IP Phone 8-18 Performing a Basic Reset 8-18 Performing a Factory Reset 8-19 Using the Quality Report Tool 8-21 Where to Go for More Information 8-21 APPENDIX A Providing Information to Users Via a Website A-1 How Users Obtain Support for the Cisco IP Phone A-1 How Users Get Copies of Cisco IP Phone Manuals A-2 How Users Subscribe to Services and Configure Phone Features A-2 How Users Access a Voice Messaging System A-3 How Users Configure Personal Directory A-4 APPENDIX B Supporting International Users B-1 Adding Language Overlays to Phone Buttons B-1 Installing the Cisco IP Telephony Locale Installer B-2 APPENDIX C Updating Firmware for the Cisco IP Phone C-1 APPENDIX D Technical Specifications E-1 Physical and Operating Environment Specifications E-1 Cable Specifications E-2 Network and Access Port Pinouts E-2 I NDEX x

Preface Overview Cisco IP Phone Administration Guide for Cisco CallManager 4.0, Cisco IP Phone 7960G and 7940G provides the information you need to understand, install, configure, and manage the Cisco IP Phone models 7960G and 7940G on your network. Audience Network engineers, system administrators, or telecom engineers should review this guide to learn the steps required to properly set up the Cisco IP Phone on the network. The tasks described are considered to be administration-level tasks and are not intended for end-users of the phones. Many of the tasks involve configuring network settings and affect the phone s ability to function in the network. Because of the close interaction between the Cisco IP Phone and Cisco CallManager, these tasks require familiarity with Cisco CallManager. xi

Objectives Preface Objectives This guide provides the required steps to get the Cisco IP Phone up and running on a Voice-over-IP (VoIP) network. Because of the complexity of an IP telephony network, this guide does not provide complete and detailed information for procedures that you need to perform on the Cisco CallManager application or other network devices. Organization This manual is organized as follows: Chapter Chapter 1, An Overview of the Cisco IP Phone Chapter 2, Preparing to Install the Cisco IP Phone on Your Network Description Provides a conceptual overview and description of the Cisco IP Phone Describes how the IP Phone interacts with other key IP telephony components, and provides an overview of the tasks required prior to installation Chapter 3, Setting Up the Cisco IP Phone Describes how to properly and safely install and configure the Cisco IP Phone on your network Chapter 4, Configuring Network Settings on the Cisco IP Phone Chapter 5, Configuring Features, Templates, Services, and Users Chapter 6, Viewing Model Information, Status, and Statistics, on the Cisco IP Phone Chapter 7, Monitoring the Cisco IP Phone Remotely Chapter 8, Troubleshooting the Cisco IP Phone Describes how to configure network settings, verify status, and make global changes to the Cisco IP Phone Provides an overview of procedures for configuring telephony features, configuring directories, configuring phone button and softkey templates, setting up services, and adding users to Cisco CallManager Explains how to view model information, status messages, network statistics, and firmware information from the Cisco IP Phone Explains how to obtain status information about the phone using the phone s web page Provides tips for troubleshooting the Cisco IP Phone and the Cisco IP Phone 7914 Expansion Module xii

Preface Related Documentation Chapter Appendix A, Providing Information to Users Via a Website Appendix B, Supporting International Users Appendix C, Updating Firmware for the Cisco IP Phone Appendix D, Technical Specifications Index Description Provides suggestions for setting up a website for providing users with important information about their Cisco IP Phones Provides information about setting up phones in non-english environments Explains how to update the firmware version for a phone Provides technical specifications of the Cisco IP Phone Provides reference information Related Documentation For more information about Cisco IP Phones or Cisco CallManager, refer to the following publications. Product Title Location Cisco IP Phone models 7960G and 7940G Cisco IP Phone 7960G and 7940G Phone Guide Cisco IP Phone 7960G and 7940G User Guide Cisco IP Phone 7914 Expansion Module Phone Guide Customizing Your Cisco IP Phone on the Web Regulatory Compliance and Safety Information for the Cisco IP Phone 7900 Series http://www.cisco.com/univercd/cc/td/d oc/product/voice/c_ipphon/index.htm xiii

Obtaining Documentation Preface Product Title Location Cisco CallManager Administration Cisco CallManager and Cisco IP Phones Services and Features Cisco CallManager Administration Guide Cisco CallManager System Guide Cisco CallManager Serviceability Administration Guide Cisco CallManager Serviceability System Guide Cisco IP Phone Authentication and Encryption for Cisco CallManager 4.0(1) Bulk Administration Tool User Guide for Cisco CallManager Troubleshooting Guide for Cisco CallManager Cisco CallManager Features and Services Guide http://www.cisco.com/univercd/cc/td/d oc/product/voice/c_callmg/index.htm http://www.cisco.com/univercd/cc/td/d oc/product/voice/c_callmg/index.htm Obtaining Documentation Cisco documentation and additional literature are available on Cisco.com. Cisco also provides several ways to obtain technical assistance and other technical resources. These sections explain how to obtain technical information from Cisco Systems. Cisco.com You can access the most current Cisco documentation on the World Wide Web at this URL: http://www.cisco.com/univercd/home/home.htm You can access the Cisco website at this URL: http://www.cisco.com xiv

Preface Documentation Feedback International Cisco websites can be accessed from this URL: http://www.cisco.com/public/countries_languages.shtml Ordering Documentation You can find instructions for ordering documentation at this URL: http://www.cisco.com/univercd/cc/td/doc/es_inpck/pdi.htm You can order Cisco documentation in these ways: Registered Cisco.com users (Cisco direct customers) can order Cisco product documentation from the Ordering tool: http://www.cisco.com/en/us/partner/ordering/index.shtml Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco Systems Corporate Headquarters (California, USA) at 408 526-7208 or, elsewhere in North America, by calling 800 553-NETS (6387). Documentation Feedback You can submit e-mail comments about technical documentation to bug-doc@cisco.com. You can submit comments by using the response card (if present) behind the front cover of your document or by writing to the following address: Cisco Systems Attn: Customer Document Ordering 170 West Tasman Drive San Jose, CA 95134-9883 We appreciate your comments. xv

Obtaining Technical Assistance Preface Obtaining Technical Assistance For all customers, partners, resellers, and distributors who hold valid Cisco service contracts, the Cisco Technical Assistance Center (TAC) provides 24-hour-a-day, award-winning technical support services, online and over the phone. Cisco.com features the Cisco TAC website as an online starting point for technical assistance. If you do not hold a valid Cisco service contract, please contact your reseller. Cisco TAC Website The Cisco TAC website provides online documents and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The Cisco TAC website is available 24 hours a day, 365 days a year. The Cisco TAC website is located at this URL: http://www.cisco.com/tac Accessing all the tools on the Cisco TAC website requires a Cisco.com user ID and password. If you have a valid service contract but do not have a login ID or password, register at this URL: http://tools.cisco.com/rpf/register/register.do Opening a TAC Case Using the online TAC Case Open Tool is the fastest way to open P3 and P4 cases. (P3 and P4 cases are those in which your network is minimally impaired or for which you require product information.) After you describe your situation, the TAC Case Open Tool automatically recommends resources for an immediate solution. If your issue is not resolved using the recommended resources, your case will be assigned to a Cisco TAC engineer. The online TAC Case Open Tool is located at this URL: http://www.cisco.com/tac/caseopen For P1 or P2 cases (P1 and P2 cases are those in which your production network is down or severely degraded) or if you do not have Internet access, contact Cisco TAC by telephone. Cisco TAC engineers are assigned immediately to P1 and P2 cases to help keep your business operations running smoothly. xvi

Preface Obtaining Additional Publications and Information To open a case by telephone, use one of the following numbers: Asia-Pacific: +61 2 8446 7411 (Australia: 1 800 805 227) EMEA: +32 2 704 55 55 USA: 1 800 553-2447 For a complete listing of Cisco TAC contacts, go to this URL: http://www.cisco.com/warp/public/687/directory/dirtac.shtml TAC Case Priority Definitions To ensure that all cases are reported in a standard format, Cisco has established case priority definitions. Priority 1 (P1) Your network is down or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation. Priority 2 (P2) Operation of an existing network is severely degraded, or significant aspects of your business operation are negatively affected by inadequate performance of Cisco products. You and Cisco will commit full-time resources during normal business hours to resolve the situation. Priority 3 (P3) Operational performance of your network is impaired, but most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels. Priority 4 (P4) You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations. Obtaining Additional Publications and Information Information about Cisco products, technologies, and network solutions is available from various online and printed sources. Cisco Marketplace provides a variety of Cisco books, reference guides, and logo merchandise. Go to this URL to visit the company store: http://www.cisco.com/go/marketplace/ xvii

Obtaining Additional Publications and Information Preface The Cisco Product Catalog describes the networking products offered by Cisco Systems, as well as ordering and customer support services. Access the Cisco Product Catalog at this URL: http://cisco.com/univercd/cc/td/doc/pcat/ Cisco Press publishes a wide range of general networking, training and certification titles. Both new and experienced users will benefit from these publications. For current Cisco Press titles and other information, go to Cisco Press online at this URL: http://www.ciscopress.com Packet magazine is the Cisco quarterly publication that provides the latest networking trends, technology breakthroughs, and Cisco products and solutions to help industry professionals get the most from their networking investment. Included are networking deployment and troubleshooting tips, configuration examples, customer case studies, tutorials and training, certification information, and links to numerous in-depth online resources. You can access Packet magazine at this URL: http://www.cisco.com/packet iq Magazine is the Cisco bimonthly publication that delivers the latest information about Internet business strategies for executives. You can access iq Magazine at this URL: http://www.cisco.com/go/iqmagazine Internet Protocol Journal is a quarterly journal published by Cisco Systems for engineering professionals involved in designing, developing, and operating public and private internets and intranets. You can access the Internet Protocol Journal at this URL: http://www.cisco.com/ipj Training Cisco offers world-class networking training. Current offerings in network training are listed at this URL: http://www.cisco.com/en/us/learning/index.html xviii

Preface Document Conventions Document Conventions This document uses the following conventions: Convention Description boldface font Commands and keywords are in boldface. italic font Arguments for which you supply values are in italics. [ ] Elements in square brackets are optional. { x y z } Alternative keywords are grouped in braces and separated by vertical bars. [ x y z ] Optional alternative keywords are grouped in brackets and separated by vertical bars. string A nonquoted set of characters. Do not use quotation marks around the string or the string will include the quotation marks. screen font Terminal sessions and information the system displays are in screen font. boldface screen font Information you must enter is in boldface screen font. italic screen font Arguments for which you supply values are in italic screen font. ^ The symbol ^ represents the key labeled Control for example, the key combination ^D in a screen display means hold down the Control key while you press the D key. < > Nonprinting characters, such as passwords are in angle brackets. Note Means reader take note. Notes contain helpful suggestions or references to material not covered in the publication. Caution Means reader be careful. In this situation, you might do something that could result in equipment damage or loss of data. xix

Document Conventions Preface Warnings use the following conventions: Warning IMPORTANT SAFETY INSTRUCTIONS This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. Use the statement number provided at the end of each warning to locate its translation in the translated safety warnings that accompanied this device. Statement 1071 SAVE THESE INSTRUCTIONS Waarschuwing BELANGRIJKE VEILIGHEIDSINSTRUCTIES Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van de standaard praktijken om ongelukken te voorkomen. Gebruik het nummer van de verklaring onderaan de waarschuwing als u een vertaling van de waarschuwing die bij het apparaat wordt geleverd, wilt raadplegen. BEWAAR DEZE INSTRUCTIES Varoitus TÄRKEITÄ TURVALLISUUSOHJEITA Tämä varoitusmerkki merkitsee vaaraa. Tilanne voi aiheuttaa ruumiillisia vammoja. Ennen kuin käsittelet laitteistoa, huomioi sähköpiirien käsittelemiseen liittyvät riskit ja tutustu onnettomuuksien yleisiin ehkäisytapoihin. Turvallisuusvaroitusten käännökset löytyvät laitteen mukana toimitettujen käännettyjen turvallisuusvaroitusten joukosta varoitusten lopussa näkyvien lausuntonumeroiden avulla. SÄILYTÄ NÄMÄ OHJEET xx

Preface Document Conventions Attention IMPORTANTES INFORMATIONS DE SÉCURITÉ Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant entraîner des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient des dangers liés aux circuits électriques et familiarisez-vous avec les procédures couramment utilisées pour éviter les accidents. Pour prendre connaissance des traductions des avertissements figurant dans les consignes de sécurité traduites qui accompagnent cet appareil, référez-vous au numéro de l'instruction situé à la fin de chaque avertissement. CONSERVEZ CES INFORMATIONS Warnung WICHTIGE SICHERHEITSHINWEISE Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu Verletzungen führen kann. Machen Sie sich vor der Arbeit mit Geräten mit den Gefahren elektrischer Schaltungen und den üblichen Verfahren zur Vorbeugung vor Unfällen vertraut. Suchen Sie mit der am Ende jeder Warnung angegebenen Anweisungsnummer nach der jeweiligen Übersetzung in den übersetzten Sicherheitshinweisen, die zusammen mit diesem Gerät ausgeliefert wurden. BEWAHREN SIE DIESE HINWEISE GUT AUF. Avvertenza IMPORTANTI ISTRUZIONI SULLA SICUREZZA Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle persone. Prima di intervenire su qualsiasi apparecchiatura, occorre essere al corrente dei pericoli relativi ai circuiti elettrici e conoscere le procedure standard per la prevenzione di incidenti. Utilizzare il numero di istruzione presente alla fine di ciascuna avvertenza per individuare le traduzioni delle avvertenze riportate in questo documento. CONSERVARE QUESTE ISTRUZIONI xxi

Document Conventions Preface Advarsel VIKTIGE SIKKERHETSINSTRUKSJONER Dette advarselssymbolet betyr fare. Du er i en situasjon som kan føre til skade på person. Før du begynner å arbeide med noe av utstyret, må du være oppmerksom på farene forbundet med elektriske kretser, og kjenne til standardprosedyrer for å forhindre ulykker. Bruk nummeret i slutten av hver advarsel for å finne oversettelsen i de oversatte sikkerhetsadvarslene som fulgte med denne enheten. TA VARE PÅ DISSE INSTRUKSJONENE Aviso INSTRUÇÕES IMPORTANTES DE SEGURANÇA Este símbolo de aviso significa perigo. Você está em uma situação que poderá ser causadora de lesões corporais. Antes de iniciar a utilização de qualquer equipamento, tenha conhecimento dos perigos envolvidos no manuseio de circuitos elétricos e familiarize-se com as práticas habituais de prevenção de acidentes. Utilize o número da instrução fornecido ao final de cada aviso para localizar sua tradução nos avisos de segurança traduzidos que acompanham este dispositivo. GUARDE ESTAS INSTRUÇÕES Advertencia! INSTRUCCIONES IMPORTANTES DE SEGURIDAD Este símbolo de aviso indica peligro. Existe riesgo para su integridad física. Antes de manipular cualquier equipo, considere los riesgos de la corriente eléctrica y familiarícese con los procedimientos estándar de prevención de accidentes. Al final de cada advertencia encontrará el número que le ayudará a encontrar el texto traducido en el apartado de traducciones que acompaña a este dispositivo. GUARDE ESTAS INSTRUCCIONES xxii

Preface Document Conventions Varning! VIKTIGA SÄKERHETSANVISNINGAR Denna varningssignal signalerar fara. Du befinner dig i en situation som kan leda till personskada. Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och känna till vanliga förfaranden för att förebygga olyckor. Använd det nummer som finns i slutet av varje varning för att hitta dess översättning i de översatta säkerhetsvarningar som medföljer denna anordning. SPARA DESSA ANVISNINGAR xxiii

Document Conventions Preface xxiv

CHAPTER 1 An Overview of the Cisco IP Phone The Cisco IP Phone is a full-featured telephone that provides voice communication over an Internet Protocol (IP) network. It functions much like a traditional analog telephone, allowing you to place and receive phone calls and to access features such as mute, hold, transfer, and speed dial. In addition, because the phone is connected to your data network, it offers enhanced IP telephony features, including access to network information and services, and customizeable features and services. The phone also supports security features that protect against data tampering threats and protect the identity of the phone. This manual describes the Cisco IP Phone 7960G and the Cisco IP Phone 7940G. These phones support G.711, G.729, G.729a, G.729b, G.729ab, and uncompressed wideband (16bits, 16kHz) audio compression. A Cisco IP Phone must be configured and managed like other network devices. This chapter includes the following topics: Understanding the Cisco IP Phone Models 7960G and 7940G, page 1-2 What Networking Protocols Are Used?, page 1-5 What Features are Supported on the Cisco IP Phone Models 7960G and 7940G?, page 1-7 Understanding Security Features for Cisco IP Phones, page 1-10 Understanding the Requirements for Installing and Configuring the Cisco IP Phone Models 7960G and 7940G, page 1-13 1-1