Polycom CX5500 Service manual

Polycom, Inc. 1
ADMINISTRATOR’S GUIDE
Polycom® CX5500 Unified Conference Station
for Microsoft®Lync™
1.1.0 | May 2014 | 3725-68635-001/A

Polycom CX5500 Unified Conference Station Administrator’s Guide 1.1.0
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Copyright ©2014, Polycom, Inc. All rights reserved. No part of this document may be reproduced, translated into
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without the express written permission of Polycom, Inc.
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Contents
About This Guide ........................................................................................................12
Who Should Read This Guide?.............................................................................................................12
Conventions Used in This Guide...........................................................................................................12
Recommended Software Tools .............................................................................................................14
Read the Feature Parameter Tables.....................................................................................................14
Example One: Feature Parameter Tables.............................................................................................15
Example Two: Configuring Grouped Parameters..................................................................................16
Get Help and Support............................................................................................................................19
About the CX5500 Unified Conference Station for Microsoft Lync.........................20
The Polycom UC Software Big Picture......................................................................21
Understand Polycom UC Software Architecture....................................................................................22
What Is the Polycom UC Software?...............................................................................22
What Are the Configuration Files? ................................................................................22
What Are the Resource Files?........................................................................................23
Set Up Your Device Network......................................................................................24
Establish Link Connectivity....................................................................................................................25
Wired Devices..................................................................................................................25
Security and Quality of Service Settings................................................................................................25
VLANs and Wired Devices..............................................................................................25
802.1X Authentication.....................................................................................................26
IP Communication Settings....................................................................................................................27
Provisioning Server Discovery...............................................................................................................28
Supported Provisioning Protocols ................................................................................29
Phone Network Menus...........................................................................................................................31
Main Menu........................................................................................................................32
Provisioning Server Menu ..............................................................................................33
DHCP Menu......................................................................................................................35
Network Interfaces Menu (Ethernet Menu)....................................................................36
VLAN Menu ......................................................................................................................37
802.1X Menu.....................................................................................................................38
PAC File Information.......................................................................................................39
Login Credentials Menu..................................................................................................39
TLS Security Menu ..........................................................................................................39
TLS Profile Menu .............................................................................................................40
Applications Menu...........................................................................................................41

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Syslog Menu ....................................................................................................................41
Set Up the Provisioning Server..................................................................................43
Why Use a Provisioning Server?...........................................................................................................43
Provisioning Server Security Notes.......................................................................................................44
Set up an FTP Server as Your Provisioning Server..............................................................................44
Download Polycom CX5500 Software Files to the Provisioning Server................................................45
Deploy and Update the CX5500 System with a Provisioning Server....................................................46
Deploy CX5500 Systems with a Provisioning Server...................................................46
Upgrade Polycom UC Software.............................................................................................................48
Configuration Methods...............................................................................................50
Use the Centralized Provisioning Method: Configuration Files.............................................................51
Understand the Master Configuration File....................................................................52
Understand Variable Substitution..................................................................................54
Use the Template Configuration Files...........................................................................56
Change Configuration Parameter Values......................................................................57
Provision with the Web Configuration Utility..........................................................................................59
Access the Web Configuration Utility ...........................................................................59
Choose Language Files for the Web Configuration Utility Interface..........................61
Phone User Interface –Menu System Settings.....................................................................................62
Set Up Basic Phone Features ....................................................................................64
Basic Phone Features at a Glance........................................................................................................64
Configure the Call Logs.........................................................................................................................65
Example Call Log Configuration....................................................................................66
Understand the Call Timer.....................................................................................................................68
Configure Call Waiting Alerts.................................................................................................................68
Example Call Waiting Configuration..............................................................................69
Called Party Identification......................................................................................................................69
Configure Calling Party Identification.....................................................................................................69
Example Calling Party Configuration ............................................................................70
Enable Missed Call Notification.............................................................................................................70
Example Missed Call Notification Configuration..........................................................71
Connected Party Identification...............................................................................................................71
Distinctive Incoming Call Treatment......................................................................................................72
Example Call Treatment Configuration .........................................................................73
Apply Distinctive Ringing .......................................................................................................................74
Example Distinctive Ringing Configuration..................................................................75
Apply Distinctive Call Waiting ................................................................................................................75
Example Distinctive Call Waiting Configuration ..........................................................76
Configure Do Not Disturb.......................................................................................................................76
Example Do Not Disturb Configuration.........................................................................78

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Use the Local Contact Directory............................................................................................................78
Example Configuration ...................................................................................................80
Configure the Local Digit Map ...............................................................................................................81
Understand Digit Map Rules...........................................................................................82
Microphone Mute...................................................................................................................................83
Configure the Speed Dial Feature.........................................................................................................83
Example Speed Dial Configuration................................................................................84
Set the Time and Date Display..............................................................................................................86
Example Configuration ...................................................................................................87
Set a Graphic Display Background........................................................................................................88
Example Graphic Display Background Configuration.................................................89
Enable Automatic Off-Hook Call Placement..........................................................................................90
Example Automatic Off-Hook Placement Configuration .............................................91
Configure Call Hold................................................................................................................................91
Example Call Hold Configuration...................................................................................92
Use Call Transfer...................................................................................................................................93
Example Call Transfer Configuration ............................................................................94
Create Local and Centralized Conferences...........................................................................................94
Enable Conference Management..........................................................................................................95
Example Conference Management Configuration .......................................................96
Configure Call Forwarding.....................................................................................................................97
Example Call Forwarding Configuration.......................................................................98
Configure Lync Call Forwarding ............................................................................................................99
Configure Directed Call Pick-Up..........................................................................................................100
Example Directed Call Pickup Configuration .............................................................100
Enable Group Call Pickup....................................................................................................................101
Example Group Call Pickup Configuration.................................................................102
Configure Call Park and Retrieve........................................................................................................102
Example Call Park and Retrieve Configuration ..........................................................103
Enable Last Call Return.......................................................................................................................104
Example Configuration for Last Call Return...............................................................104
Set Up Advanced Phone Features...........................................................................106
Assign Multiple Line Keys Per Registration.........................................................................................107
Example Configuration .................................................................................................108
Enable Multiple Call Appearances.......................................................................................................108
Example Multiple Call Appearances Configuration ...................................................110
Set the Phone Language.....................................................................................................................111
Example Phone Language Configuration ...................................................................112
Synthesized Call Progress Tones........................................................................................................113
Configure Real-Time Transport Protocol Ports....................................................................................114
Example Real-Time Transport Protocol Configuration..............................................115
Configure Network Address Translation..............................................................................................115

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Example Network Address Translation Configuration ..............................................116
Use the Corporate Directory................................................................................................................116
Example Corporate Directory Configuration ..............................................................118
Configure Enhanced Feature Keys......................................................................................................120
Some Guidelines for Configuring Enhanced Feature Keys ......................................121
Enhanced Feature Key Examples................................................................................122
Understanding Macro Definitions................................................................................123
Macro Actions................................................................................................................123
Prompt Macro Substitution ..........................................................................................124
Expanded Macros..........................................................................................................125
Special Characters ........................................................................................................125
Example Macro ..............................................................................................................125
Speed Dial Example ......................................................................................................126
Configure Soft Keys.............................................................................................................................127
Example Soft Key Configurations................................................................................128
Enable the Power Saving Feature.......................................................................................................130
Example Power-Saving Configuration ........................................................................131
Configure Group Paging......................................................................................................................131
Configure Shared Call Appearances...................................................................................................133
Example Configuration .................................................................................................135
Enable Bridged Line Appearance........................................................................................................136
Example Bridged Line Appearance Configuration.....................................................137
Enable Voicemail Integration...............................................................................................................138
Example Voicemail Configuration ...............................................................................139
Enable Multiple Registrations..............................................................................................................140
Example Multiple Registration Configuration.............................................................141
Set Up Server Redundancy.................................................................................................................142
DNS SIP Server Name Resolution......................................................................................................143
Behavior When the Primary Server Connection Fails ...............................................144
Recommended Practices for Fallback Deployments.................................................145
Use the Presence Feature...................................................................................................................146
Example Presence Configuration ................................................................................147
Configuring the Static DNS Cache ......................................................................................................148
Example Static DNS Cache Configuration..................................................................149
Displaying SIP Header Warnings ........................................................................................................152
Example Display of Warnings from SIP Headers Configuration...............................153
Quick Setup of the CX5500 System....................................................................................................153
Example Quick Setup Configuration ...........................................................................155
Provisional Polling of the CX5500 System ..........................................................................................155
Example Provisional Polling Configuration................................................................156
Set Up Microsoft Lync Server 2010 and 2013.....................................................................................157
Register with Microsoft Lync Server 2010 ..................................................................158

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Example Configuration: Setting the Base Profile to Lync.........................................160
Enable Microsoft Exchange Calendar Integration...............................................................................162
Example Exchange Calendar Configuration...............................................................164
Set Up Phone Audio Features..................................................................................166
Customize Audio Sound Effects..........................................................................................................167
Example Configuration .................................................................................................168
Voice Activity Detection .......................................................................................................................168
Generate Dual Tone Multi-Frequency (DTMF) Tones.........................................................................169
DTMF Event RTP Payload...................................................................................................................169
Acoustic Echo Cancellation.................................................................................................................170
Audio Codecs.......................................................................................................................................170
IP Type-of-Service...............................................................................................................................172
IEEE 802.1p/Q.....................................................................................................................................172
Voice Quality Monitoring (VQMon)......................................................................................................173
Built-In Audio Processing Features .....................................................................................................174
Automatic Gain Control ................................................................................................174
Background Noise Suppression..................................................................................174
Comfort Noise Fill..........................................................................................................174
Dynamic Noise Reduction ............................................................................................174
Jitter Buffer and Packet Error Concealment...............................................................174
Low-Delay Audio Packet Transmission ......................................................................174
Set Up User and Phone Security Features..............................................................175
Local User and Administrator Passwords............................................................................................176
Incoming Signaling Validation..............................................................................................................176
Configuration File Encryption...............................................................................................................177
Digital Certificates................................................................................................................................177
Generating a Certificate Signing Request ...........................................................................................179
Configure TLS Profiles.........................................................................................................................180
Download Certificates to a CX5500 System................................................................182
Set TLS Profiles.............................................................................................................183
Support Mutual TLS Authentication.....................................................................................................183
Configurable TLS Cipher Suites..........................................................................................................184
Secure Real-Time Transport Protocol.................................................................................................185
Lock the Phone....................................................................................................................................188
Support 802.1X Authentication............................................................................................................189
Set User Profiles..................................................................................................................................191
Use the CX5100/5500 Control Panel........................................................................195
Find Your Default System Password...........................................................................196
Create or Load a System Profile ..................................................................................196
Update the CX5500 System’s Software Automatically ..............................................197

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Troubleshoot Your CX5500 System.........................................................................198
Understand Error Message Types.......................................................................................................198
Error Messages..............................................................................................................199
Polycom UC Software Error Messages .......................................................................199
Status Menu.........................................................................................................................................201
Log Files...............................................................................................................................................202
Reading a Boot Log File ...............................................................................................205
Reading an Application Log File..................................................................................206
Reading a Syslog File ...................................................................................................207
Manage the CX5500 System’s Memory Resources............................................................................208
Identify Symptoms ........................................................................................................208
Check the Phone’s Available Memory.........................................................................208
Test Phone Hardware..........................................................................................................................209
Upload a Phone’s Configuration ..........................................................................................................210
Network Diagnostics............................................................................................................................210
Ports Used on the CX5500 System.....................................................................................................210
Power and Startup Issues....................................................................................................................211
Touch Screen Issues...........................................................................................................................212
Screen and System Access Issues .....................................................................................................212
Calling Issues.......................................................................................................................................213
Display Issues......................................................................................................................................213
Audio Issues ........................................................................................................................................214
Licensed Feature Issues......................................................................................................................214
Upgrading Issues.................................................................................................................................214
Miscellaneous Maintenance Tasks..........................................................................216
Trusted Certificate Authority List..........................................................................................................216
Encrypt Configuration Files..................................................................................................................219
Internal Key Functions.........................................................................................................................220
Assign a VLAN ID Using DHCP...........................................................................................................223
Parse Vendor ID Information...............................................................................................................225
Product, Model, and Part Number Mapping ........................................................................................226
Capture the Phone’s Current Screen...................................................................................................226
LLDP and Supported TLVs..................................................................................................................227
Supported TLVs.............................................................................................................228
Configuration Parameters ........................................................................................233
<apps/>................................................................................................................................................235
<bg/>....................................................................................................................................................238
<button/>..............................................................................................................................................238
<call/>...................................................................................................................................................239
<callLists/>...........................................................................................................................................243
<device/> .............................................................................................................................................243

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<dialplan/> ...........................................................................................................................................252
<dir>.....................................................................................................................................................255
<broadsoft/>...................................................................................................................256
<local/>...........................................................................................................................256
<corp/>............................................................................................................................257
<divert/>...............................................................................................................................................259
<dns/>..................................................................................................................................................260
DNS-A.............................................................................................................................260
DNS-NAPTR ...................................................................................................................261
DNS-SRV ........................................................................................................................262
<efk/>...................................................................................................................................................262
<exchange/>........................................................................................................................................264
<feature/>.............................................................................................................................................265
<httpd/>................................................................................................................................................267
<keyboard/>.........................................................................................................................................268
<lcl/>.....................................................................................................................................................268
<ml/>....................................................................................................................................................269
<datetime/>.....................................................................................................................271
<loc/> ...................................................................................................................................................272
<log/>...................................................................................................................................................273
<level/> <change/>and<render/>..................................................................................274
<sched/>.........................................................................................................................275
<msg/>.................................................................................................................................................276
<mwi/>..................................................................................................................................................277
<nat/>...................................................................................................................................................277
<phoneLock/>......................................................................................................................................278
<powerSaving/>...................................................................................................................................279
<pres/>.................................................................................................................................................280
<prov/>.................................................................................................................................................281
<ptt/>....................................................................................................................................................283
<qos/>..................................................................................................................................................283
<reg/>...................................................................................................................................................285
<request/>............................................................................................................................................294
<roaming_buddies/>............................................................................................................................294
<roaming_privacy/> .............................................................................................................................294
<saf/>...................................................................................................................................................295
<se/>....................................................................................................................................................296
<pat/>..............................................................................................................................297
<rt/>.................................................................................................................................300
<sec/> ..................................................................................................................................................302
<encryption/>.................................................................................................................302
<pwd/><length/> ............................................................................................................303
<srtp/>.............................................................................................................................304

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<dot1x><eapollogoff/> ..................................................................................................306
<hostmovedetect/>........................................................................................................306
<TLS/>.............................................................................................................................306
<softkey/> ............................................................................................................................................309
<tcpIpApp/>..........................................................................................................................................311
<dhcp/>...........................................................................................................................312
<dns/>.............................................................................................................................312
<ice/> ..............................................................................................................................313
<sntp/>............................................................................................................................313
<port/><rtp/> ..................................................................................................................315
<keepalive/>...................................................................................................................316
<fileTransfer/>................................................................................................................316
<tones/>...............................................................................................................................................317
<DTMF/> .........................................................................................................................317
<chord/> .........................................................................................................................318
<up/>....................................................................................................................................................319
<upgrade/>...........................................................................................................................................322
<video/> ...............................................................................................................................................322
<camera/>.......................................................................................................................324
<codecs/>.......................................................................................................................325
<voice/>................................................................................................................................................328
<codecPref/>..................................................................................................................329
<volume/>.......................................................................................................................330
<vad/>.............................................................................................................................330
<quality monitoring/>....................................................................................................331
<rxQoS/>.........................................................................................................................332
<voIpProt/> ..........................................................................................................................................333
<server/>.........................................................................................................................334
<SDP/>............................................................................................................................337
<SIP/>..............................................................................................................................337
<webutility/>.........................................................................................................................................345
<xmpp/>..........................................................................................................................345
Session Initiation Protocol (SIP)..............................................................................347
RFC and Internet Draft Support...........................................................................................................347
Request Support............................................................................................................348
Header Support..............................................................................................................349
Response Support.........................................................................................................352
Hold Implementation.....................................................................................................356
Reliability of Provisional Responses...........................................................................356
Transfer..........................................................................................................................356
Third Party Call Control ................................................................................................356

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SIP for Instant Messaging and Presence Leveraging Extensions............................357
Shared Call Appearance Signaling..............................................................................357
Bridged Line Appearance Signaling............................................................................357
Polycom UC Software Menu System.......................................................................358
Third-Party Software.................................................................................................364

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About This Guide
The Polycom®CX5500 Unified Conference Station Administrator’s Guide provides instructions for
installing, provisioning, and administering the CX5500 Unified Conference Station. This guide will help
you understand the Polycom VoIP network and telephony components of the CX5500 system, provides
descriptions of all available phone features, and helps you perform the following tasks:
●Install and configure your phone on a network server or Web server
●Configure your phone’s features and functions
●Configure your phone’s user settings
●Troubleshoot common phone issues
Web Info: Using the Polycom CX5500 Unified Conference Station
For more information on how to use the features available on the CX5500 system, see the
Polycom CX5500 Unified Conference Station for Microsoft Lync User Guide.
Who Should Read This Guide?
System administrators and network engineers should read this guide to learn how properly to set up the
CX5500 system. This guide describes administration-level tasks and is not intended for end users.
Before reading this guide, you should be familiar with the following:
●Computer networking and driver administration for your operating system
●An XML editor
●The XML-based configuration file format used for the Polycom UC Software
Conventions Used in This Guide
Polycom guides contains graphical elements and a few typographic conventions. Familiarizing yourself
with these elements and conventions will help you successfully perform tasks.
Icons Used in this Guide
Name
Icon
Description
Note
The Note icon highlights information of interest or important information needed
to be successful in accomplishing a procedure or to understand a concept.
Administrator Tip
The Administrator Tip icon highlights techniques, shortcuts, or productivity
related tips.

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Name
Icon
Description
Caution
The Caution icon highlights information you need to know to avoid a hazard
that could potentially impact device performance, application functionality, or
successful feature configuration.
Warning
The Warning icon highlights an action you must perform (or avoid) to
prevent issues that may cause you to lose information or your
configuration setup, and/or affect phone or network performance.
Web Info
The Web Info icon highlights supplementary information available online such
as documents or downloads on support.polycom.com or other locations.
Timesaver
The Timesaver icon highlights a faster or alternative method for accomplishing
a method or operation.
Power Tip
The Power Tip icon highlights faster, alternative procedures for advanced
administrators already familiar with the techniques being discussed.
Troubleshooting
The Troubleshooting icon highlights information that may help you solve a
relevant problem or to refer you to other relevant troubleshooting resources.
Settings
The Settings icon highlights settings you may need to choose for a specific
behavior, to enable a specific feature, or to access customization options.
A few typographic conventions, listed next, are used in this guide to distinguish types of in-text
information.
Typographic Conventions
Convention
Description
Bold
Highlights interface items such as menu selections, soft keys, file names, and
directories. Also used to represent menu selections and text entry.
Italics
Used to emphasize text, to show example values or inputs, and to show titles of
reference documents available from the Polycom Support web site and other
reference sites.
Blue Text
Used for cross references to other sections within this document and for hyperlinks
to external documents and web sites.
Courier
Used for code fragments and parameter names.

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This guide also uses a few writing conventions to distinguish conditional information.
Writing Conventions
Convention
Description
<MACaddress>
Indicates that you must enter information specific to your installation, phone, or
network. For example, when you see <MACaddress>, enter your phone’s 12-digit
MAC address. If you see <installed-directory>, enter the path to your installation
directory.
>
Indicates that you need to select an item from a menu. For example, Settings >
Basic indicates that you need to select Basic from the Settings menu.
parameter.*
Used for configuration parameters. If you see a parameter name in the form
parameter.* , the text is referring to all parameters beginning with parameter.
See Read the Feature Parameter Tables for an example.
Recommended Software Tools
Polycom recommends that you use an XML editor—such as XML Notepad—to create and edit
configuration files. In this way, all configuration files that you create will be valid XML files.
If the configuration files are not valid XML, they will not load on the handset and an error message will be
logged to the provisioning server.
Read the Feature Parameter Tables
Each of the feature descriptions discussed in this administrator’s guide includes a table of parameters
that you configure to make the features work. This brief section explains the conventions used in the
feature parameter tables. Polycom strongly recommends gaining familiarity with these conventions in
order to read the tables and successfully perform configuration changes.
The feature parameter tables indicate one or more of three provisioning methods you can use to
configure a feature: a centralized provisioning server, the Web Configuration Utility, or the local phone
user interface. Note that the types of provisioning methods available for each feature will vary; not every
feature uses all three methods.
The central provisioning server method requires you to configure parameters located in template
configuration files that Polycom provides in XML format. The following illustration shows you how to use
the parameter tables to locate the template name and the name of the parameter you configure to get the
phone features working.

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Feature Parameter Table Format
To quickly locate a specific parameter, locate and open the template name indicated. Then, use the
parameter name to navigate the folders in the XML tree structure. The parameter name contains the XML
folder path. The two following examples explain this convention in more detail.
Example One: Feature Parameter Tables
The example shown next is taken from the section Set the Time and Date Display in the Configuration
Methods section.
Feature Parameter Table for Time and Date Display
This example indicates that the reg-advanced.cfg template file contains the up.localClockEnabled
parameter, which turns the time and date display on or off. This parameter is enabled by default. If you
want to turn the time and date display on or off, locate and open the reg.advanced template, expand the
up folder, and locate the parameter name up.localClockEnabled. Set the parameter value to 1to
turn on or 0to turn off the time and date display, as shown in the following illustration.

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Example Time and Date Display
Note that some of the file paths in the templates are long and you may have to expand several folders in
the XML tree structure to locate a specific parameter.
Note also that some feature parameters are located in more than one template file. In these cases, the
parameter tables will list all related template files.
Tip: Each Parameter Is Linked
Each parameter listed in the tables in various sections is linked to its definition in the section Third-
Party Software. The sections in that section define each parameter and list the permissible values,
including the default value, of each parameter. If you want to find out more about a parameter you
see listed in the tables, click the parameter name.
Example Two: Configuring Grouped Parameters
Some of the features have several related parameters that you must configure to get the feature working.
In these cases, instead of listing every parameter, the table will specify a group of related parameters with
an abbreviated XML path name ending with (.*), which indicates you can configure a group of related
parameters.
Abbreviated XML paths, like full parameter names, are linked to their definitions in the reference sections
in the section Third-Party Software. Specifically, since the reference sections lists parameters
alphabetically, abbreviated XML path are linked to the first of a group of parameters listed alphabetically

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in the reference section. The next example shows you that in the site.cfg template, the tcpIpApp.sntp
folder contains several related parameters that configure basic SNTP settings.
Feature Parameter Table for Time and Date SNTP Settings
This example indicates that there is a group of SNTP parameters you can configure in the site.cfg
template file. The abbreviated parameter name tcpIpApp.sntp.* indicates that you can configure
parameters in the tcpIpApp.sntp folder as well as parameters in tcpIpApp.sntp subfolders.
To locate these parameters in the XML file, use the parameter name. The parameter name contains the
XML folder path, as shown in the following illustration.

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Locating Parameters in the Templates
In cases where the feature has several related parameters, you may find it helpful to refer to the
parameter reference section in the section Polycom UC Software Menu System for a definition of each
parameter. All parameter names, including abbreviated names, are linked to the parameter reference
section - simply click on the parameter name.
This section has shown you how to read the configuration parameter tables so that you can locate the
parameters in the XML template file.
Tip: Using an XML Editor
Polycom recommends using an XML editor such as XML Notepad 2007 to open and edit the
configuration template files.

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Get Help and Support
If you are looking for help or technical support for your phones, the following types of documents are
available at the Polycom Support Center:
●Quick Start Guides, which describe how to assemble phones
●Quick User Guides, which describe the basic phone features
●User Guides, which describe both basic and advanced phone features
●Web Applications Developer’s Guide, which provides guidance in the development of applications
that run on your phone’s Web browser or microbrowser
●Feature Description and Technical Notifications, such as Technical Bulletins and Quick Tips, that
describe workarounds to existing issues and provide expanded descriptions and examples
●Release Notes, which describe the new and changed features and fixed problems in the latest
version of the software
You can find Request for Comments (RFC) documents by entering the RFC number at
http://www.ietf.org/rfc.html.
For other references, look for the Web Info icon throughout this Administrator’s Guide.

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About the CX5500 Unified Conference
Station for Microsoft Lync
You can use the Polycom CX5500 Unified Conference Station to make the following types of calls:
●Audio-only conference calls with Open SIP voice platforms or in a Lync Server environment.
●Audio and video calls made using Microsoft®Lync™. When your CX5500 system is connected to a
computer running Lync client, the system provides a 360-degree view of the conference room and
automatically identifies the active speaker.
Note that this administrator’s guide focuses on configuring the telephony features available on the
CX5500 system when used as an audio-only conference phone. For information on configuring settings
available on the CX5500 system when connected to a computer and used as a audio and video
conference phone, see the section Use the CX5100/5500 Control Panel.