Understanding the VoIP Wireless Network | Cisco Systems 8961

C H A P T E R 6

Understanding the VoIP Wireless Network

This chapter provides an overview of the interaction between a wireless-capable Cisco Unified IP Phone 9971 and other key components of a VoIP network in a wireless local area network (WLAN) environment. This chapter contains the following sections:

•Understanding the Wireless LAN, page 6-1

•Understanding WLAN Standards and Technologies, page 6-2

•Bluetooth Wireless Technology, page 6-7

•Components of the VoIP Wireless Network, page 6-8

•Security for Voice Communications in WLANs, page 6-11

•VoIP WLAN Configuration, page 6-15

•Configuring Wireless LAN, page 6-16

Note For instructions on deploying and configuring a wireless Cisco Unified IP Phone 9971, refer to the Cisco Unified IP Phone 9971 Wireless LAN Deployment Guide at this location:

http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/9971_9951_8961/7_1_3/english/deploymen t/guide/9971dply.pdf

Understanding the Wireless LAN

With the introduction of wireless communication, Cisco Unified IP Phones with wireless capability, such as the Cisco Unified IP Phone 9971, can provide voice communication within the corporate WLAN. The Cisco Unified IP Phone depends upon and interacts with wireless access points (APs) and key Cisco IP telephony components, including Cisco Unified Communications Manager Administration, to provide wireless voice communication. Cisco Access Points can run in standalone or unified mode. Unified mode requires the Cisco Unified Wireless LAN Controller.

The Cisco Unified IP Phone 9971 exhibits Wi-fi capabilities which can be used 802.11a, 802.11b and 802.11g Wi-Fi.

Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 8.5 (SIP)

	OL-20861-01	6-1

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Cisco Systems 8961 manual Understanding the VoIP Wireless Network, Understanding the Wireless LAN

Contents

Text Part Number OL-20862-01 Americas HeadquartersPage Iii N T E N T S Manager Key Expansion Module Settings on the Phone Interacting with Cisco Unified Wireless APs Vii Configuring Personal Directory Viii Status Menu Technical Specifications Installing the Wall Mount for the Cisco Unified IP Phone E-1 Chapter Description OverviewAudience Organization Xii Xiii Related DocumentationCisco Product Security Overview Cisco Unified IP Phones 8961, 9951, Xiv Document ConventionsConvention Description Boldface font An Overview of the Cisco Unified IP Phone 1describes the buttons on the Cisco Unified IP Phone 1shows the main components of the Cisco Unified IP Phone Features on the Cisco Unified IP Phone 2shows the main components of the Cisco Unified IP Phone 2describes the buttons on the Cisco Unified IP Phone Features on the Cisco Unified IP Phone 3shows the main components of the Cisco Unified IP Phone 3describes the buttons on the Cisco Unified IP Phone Features on the Cisco Unified IP Phone Networking Protocol Purpose Usage Notes What Networking Protocols are Used?Communications Manager System Guide URL Authentication on Cisco Unified IP Phones section SIP See the LLDP-MED and Cisco Discovery ProtocolWhite paper Nologieswhitepaper0900aecd804cd46d.shtml UDP Feature OverviewCisco Unified Communications Manager System Guide Related Topic Configuring Telephony Features See the Security Restrictions section on Providing Users with Feature InformationSee the Overview of Supported Security Features section on Topic Reference Unified Communications Manager Security Guide Overview of Supported Security FeaturesManager Feature Description Choose AdministratorIP Phone section on page 3-21for more information Phones section on page 1-22for more information Cisco Unified Communications Manager Security Guide Identifying Secure Encrypted Phone Calls Understanding Security Profiles Establishing and Identifying Secure Calls Security Restrictions with Conference Calls Overview Supporting 802.1X Authentication on Cisco Unified IP Phones Security Restrictions OL-20861-01 Purpose For More Information Administration Guide Communications Manager Administration Chapter in the Cisco Unified Communications Manager Task Purpose For More Information Installing Cisco Unified IP Phones Wireless Network See the Configuring Startup NetworkSettings section on See the Ethernet Setup Menu section on 9951, and 9971 User Guide for Cisco User Guide Administration GuideTerminology Information Refer to the Cisco Unified IP Phone A P T E R Cisco Communications Manager Administration Guide Providing Power to the Cisco Unified IP Phone Power Type Guidelines Power GuidelinesPower Outage Reducing Power Consumption on the Phone Obtaining Additional Information About Power Power Negotiation over Lldp Understanding Phone Configuration Files Purpose Related Topics Understanding the Phone Startup Process Communications Manager Security Refer to Cisco Unified Information for the phone Request the configuration fileConfiguration file defines how the Cisco Unified IP Phone Task Purpose Related Topics Taps Tool BAT updates information in the Cisco UnifiedAdding Phones with Auto-Registration Requires MAC Method Address? Adding Phones with Auto-Registration and Taps Procedure Adding Phones Using BAT Phone Template Determining the MAC Address for a Cisco Unified IP Phone OL-20861-01 Network Requirements Before You Begin Understanding the Cisco Unified IP Phone Components Cisco Unified Communications Manager Configuration Handset Rest Network and Computer Ports Speakerphone Accessory TypeCisco Accessory Third-Party Accessories USB Port Data Information HeadsetsExternal Speakers and Microphone Audio Quality Subjective to the User Disabling a Wired Headset Highlight the analog headset, then press the Setup softkey Select AccessoriesDisabling the USB Headset Wireless Headsets Select Add Bluetooth Accessory Adding a Bluetooth Wireless Headset to the Phone User guides that were provided with your headset Press the Applications button Using External Devices Installing the Cisco Unified IP Phone Wlan See the Headsets section on page 3-5forSee the Network and Computer Ports Section on page 3-3for guidelines Cisco Unified IP Phone 8961 Connections Back Cisco Unified IP Phone 8961 Cable Connections Side Cisco Unified IP Phone 9951 Cable Connections Back Cisco Unified IP Phone 9951 Cable Connections Side Cisco Unified IP Phone 9971 Cable Connections Back Cisco Unified IP Phone 9971 Cable Connections Side Cisco Unified IP Phone 8961, 9951, Connecting the Footstand Securing the Phone with a Cable Lock Phone Display Viewing AngleMounting the Phone to the Wall Configuring Security on the Cisco Unified IP Phone Configuring Startup Network SettingsVerifying the Phone Startup Process Before You Begin To configure an LSC on the phone, perform these steps Cisco Unified IP Phone Model KEMs Supported Setting Up the Cisco Unified IP Color Key Expansion Module Power Consumption Power InformationConnecting a Single KEM to the Cisco Unified IP Phone Removing a Key Expansion Module, Troubleshooting, 206800 Cisco Unified IP Phone with Three KEMs Attached Upgrading the Key Expansion Module Key Expansion Module Settings on the Phone KEM starts to upgrade TroubleshootingRemoving a Key Expansion Module Configuring the Cisco Unified Video Camera Setting Up the Cisco Unified Video Camera Select Accessories Highlight Cisco Unified Camera Adjusting the Camera SettingsAdjusting the Camera View Area Installation Procedure Select Brightness Adjusting the Brightness SettingAdjusting Auto Transmit Setting Select View Area Using the Cisco Unified Video Camera Post-Installation Steps Understanding the Wireless LAN Understanding the VoIP Wireless Network This section describes the following concepts Understanding Wlan Standards and Technologies UNII-3 Standards for Wlan CommunicationsPart Number Band Range UNII-2 Supported Countries World Mode 802.11d Data Rate Range Receiver Sensitivity 802.11a Data Rates, Tx Power, Ranges, and Decibel TolerancesRadio Frequency Ranges Standard Dsss Ofdm Wireless Modulation TechnologiesData Rate Range Receiver Sensitivity 802.11b 802.11b 802.11g 802.11a WLANs and Roaming Bluetooth Wireless TechnologyVoice QoS in a Wireless Network, VoIP Wlan Configuration, AP, Channel, and Domain Relationships Interacting with Cisco Unified Wireless APs Components of the VoIP Wireless NetworkAssociating to APs Network Voice QoS in a Wireless Network OL-20861-01 This section contains the following items Authentication MethodsSecurity for Voice Communications in WLANs Interacting with Cisco Unified Communications Manager Authenticated Key Management Pre-shared key, WPA2 Pre-shared key, or Cckm Choosing AP Authentication and Encryption MethodsEncryption Methods Or Cckm Management Encryption Authentication Cisco AP Configuration Key CommonCisco Unified IP Phone Unified VoIP Wlan ConfigurationSupported Access Points Supported APs and Modes Supported Antennas Configuring Wireless LAN OL-20861-01 OL-20861-01 Setup Menus on the Cisco Unified IP Phone Configuring Settings on the Cisco Unified IP Phone To display a submenu repeat Step Displaying a Setup Menu Editing Values IPv4 Setup Menu Options, Security Setup Menu,Displaying a Setup Menu, Unlocking and Locking Options Option Description To Change Ethernet Setup MenuSelect button PC Vlan System Enterprise Phone Configuration Wlan Setup Menu Ssid Option Description To Change IPv4 Setup Menu Options To Cisco Unified Communications Manager Security Guide Cisco Unified Communications Manager Security For this phone Security Setup MenuSee the 802.1X Authentication and Transaction LSC Manager Security Guide To the Configuring the Cisco CTL ClientTrust List Menu Section in Cisco Unified Communications 802.1X Authentication and Transaction Status Use this procedure to connect through VPN VPN Configuration MenuProcedure Steps Choose Applications VPN VPN Enabled If Auto-Detect Network Connection is disabled OL-20861-01 Configuring Features, Templates, Services, and Users System Guide, Cisco Unified IP Phones Feature Description Configuration ReferenceFeatures and Services Guide, Barge System Service Parameter and select Unified Communications Manager Unified Communications Manager FeaturesServices Guide, Call Pickup chapter Communications Manager Features Administration Guide, Feature Control Configuration System Enterprise PhoneAdministration Guide, Cisco Unified IP Phone Configuration chapter BLF Services GuideManager Features and Services Guide Device Phone Features and Services Guide, Call Features and Services Guide, Cisco CallDisplay Restrictions chapter Forward Maximum Hop Count service parameter Administration Guide, DirectoryCisco Unified Communications Incoming call information on the phone screen Configure the call pickup feature to supportDuring a call when it is being recorded Services Guide, Monitoring and Recording System Guide, Understanding Route Communications Features and ServicesExtention Mobility chapter in the Cisco Administration Features and Services GuideServices Guide, Cisco Extension Load Information field Choose Device Device DefaultsFrom the Bulk Administration Divert, go to the Cisco Unified IP Phone Phone Button Template for Personal Address Services Guide, External Call ControlBook or Speed Dials, Configuration chapter Administration Guide, Hunt Group Manager Administration Guide Communications Manager FeatureChapters of Cisco Unified Communications Administration Guide, Message Waiting Features and Services Guide, Malicious Monitoring section on Services Guide, Call Park and DirectedUnified IP Phone 9971 User Guide for Cisco Unified Communications Manager SIP Peer Firmware Sharing may also aid in firmware Go to Product Specific ConfigurationLayout area and select Enable from Simultaneously Unified Communications Manager Security Features and Services Guide BargeAdministration Guide, Phone Button Plar Creating Custom Phone Rings section Features and Services Guide, QualityQRT Report Tool chapter OL-20861-01 Features and Services Guide, Cisco Unified Administration Guide, ConferenceBridge Configuration chapter Services Guide, Cisco Unified Mobility Administration Guide, Date/Time Group Administration Guide, Time PeriodSystem Guide, Time-of-Day Routing Park Monitoring Field Description Setting the Service Parameters for Park Monitoring Field Description List of Parameters Configuring Product Specific Configuration ParametersRtcp Override Common Settings Check Box Configuring Corporate and Personal DirectoriesConfiguring Corporate Directories Configuring Personal Directory Dedicated Feature Feature Buttons and SoftkeysButton Softkey Modifying a Phone Button Template for All Calls Modifying Phone Button TemplatesMcid Secure Service URL For PAB, enter the following URL Configuring Feature Control Policies Feature Default Value Setting Up ServicesUnified Communications Manager Administration Guide Adding Users to Cisco Unified Communications Manager Managing the User Options Web Pages Giving Users Access to the User Options Web PagesClick Add Selected OL-20861-01 Specifying Options that Appear on the User Options Web Pages Customizing the Cisco Unified IP Phone Customizing and Modifying Configuration Files Ringlist.xml File Format Requirements Creating Custom Phone Rings PCM File Requirements for Custom Ring Types Configuring a Custom Phone Ring List.xml File Format Requirements Creating Custom Background ImagesList.xml Example PNG File Requirements for Custom Background Images Configuring a Custom Background Image Configuring Wideband Codec Automatically Disabling the Cisco Unified IP Phone Display Configuring the Idle Display Display On and Off Configuration Fields 10-1 Model Information ScreenModel Information Screen, Status Menu, Information 10-2 Status Menu Message Description Possible Explanation and Action Select Administrator SettingsStatus Messages Screen Select Status Messages Menu section on page 7-4section for details Ethernet Setup Menu section on page 7-4for detailsIf you are using DHCP, check the Dhcp server On assigning a static IP address 10-5 10-6 Unified CM Security Guide 10-7 Ethernet Statistics Screen 10-8 Select Status Ethernet Statistics 10-9 Wlan Statistics ScreenPort IPv4 Select Wlan Statistics 10-10 Call Statistics screen displays these items Call Statistics ScreenSelect Status Select Call Statistics 10-12 Voice-Quality MetricsMOS LQK Cisco Unified IP Phone uses 10-13 Select Administrator Settings Select Call Statistics 10-14 Select Current Access Point Current Access Point Screen10-15 10-16 11-1 Monitoring the Cisco Unified IP Phone Remotely 11-2 Accessing the Web Page for a Phone 11-3 Enabling and Disabling Web Page AccessClick Apply Config Choose Device Phone UDI Device Information11-4 About other phone settings. -2describes these items Network Setup11-5 11-6 11-7 11-8 Network Statistics 11-9 11-10 Lldp 11-11 Device LogsStreaming Statistics 5describes the items in the Streaming Statistics areas 11-12 IP Phone uses Voice Quality Metrics Configuring Settings on the Cisco Unified IP Phone chapter11-13 11-14 12-1 Resolving Startup Problems 12-2 12-3 Identifying Error Messages 12-4 Choose Tools Control Center Feature Services 12-5 Resolve, the configuration file may be corruptedTo create a new configuration file, follow these steps Experiencing problems Identifying Intermittent Network Outages Cisco Unified IP Phone Resets UnexpectedlySymptom Cisco Unified IP Phone Unable to Obtain IP Address Verifying the Physical Connection Verifying that the Phones Have Not Been Intentionally Reset Verifying Dhcp SettingsChecking Static IP Address Settings Verifying the Voice Vlan Configuration Checking Power Connection Eliminating DNS or Other Connectivity Errors12-8 Problem Possible Cause Troubleshooting Cisco Unified IP Phone Security12-9 Summary Explanation General Troubleshooting Tips12-10 12-11 Displaying these statistics Halfduxcollisionexceedthreshold To resolve this problem, re-enable the port from the switch12-12 12-13 12-14 Performing Explanation Resetting the Cisco Unified IP Phone12-15 Monitoring the Voice Quality of Calls Using the Quality Report Tool12-16 Metric Change Condition Where to Go for More Troubleshooting InformationCleaning the Cisco Unified IP Phone Troubleshooting Tips 12-18 Providing Information to Users Via a Website How Users Access a Voice Messaging System Installing the Synchronizer How Users Configure Personal Directory Entries Configuring the Synchronizer Support for International Call Logging Supporting International Users OL-20861-01 Specification Value or Range Physical and Operating Environment Specifications Pin Number Function Cable SpecificationsNetwork Port Connector Network and Computer Port Pinouts Table C-3describes the Computer port connector pinouts Computer Port Connector OL-20861-01 Example User Information for these Procedures Basic Phone Administration Steps Click Perform Full Sync Now Proceed to Configuring the Phone, page D-3Adding a User From an External Ldap Directory Choose System Ldap Ldap Directory Example doe Configuring the PhoneProceed to the section Configuring the Phone, page D-3 Example johndoe OL-20861-01 OL-20861-01 Choose User Management End User Performing Final End User Configuration StepsClick Device Associations Installing the Wall Mount for Cisco Unified IP Phone Before You Begin 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 Machine Installing the Bracket Figure E-8 Mounting the Wall Bracket Figure E-9 Attaching the Phone Bracket Figure E-10 Preparing the Handset Hook Figure E-11 Plugging the Power Cord into the Phone Figure E-12 Attaching the Phone to the Wall Bracket Cisco Unified IP Phone Non-Lockable Wall Mount 345749 Ethernet Cable Wall bracket Components Install Non-Lockable Wall Mount for phone Figure F-4 Mount the Wall Bracket Figure F-5 Attach the Phone Bracket Figure F-6 Figure F-7 Attach phone to wall bracket Remove Phone from Non-Lockable Wall Mount Figure F-8 Tab location Figure F-9 345743 Screws Anchors Phone bracket Before You Begin Figure F-13 Bracket Installation Figure F-14 Attach Phone Bracket Figure F-15 Figure F-16 Attach Phone to Wall Bracket Figure F-17 Figure F-18 OL-20861-01 IN-1 Numerics IN-2 Technical specifications Using Ldap directoriesCall waiting Capf Certificate Authority Proxy Function Cast IN-3 DND HTTP, description Https Using Wired Headset port Hold Hold reversion HttpEthernet Statistics screen USB Cast CDP Dhcp Http Rtcp RTP SIP TCP Tftp UDP MICIN-5 IN-6 Trust List Security profiles IntentionallyIN-7 IN-8 DNS VPN TftpIN-9 IN-10