Yealink VC400 Service manual

Administrator’s Guide for Yealink Video Conferencing Systems
Copyright
Copyright © 2017 YEALINK(XIAMEN) NETWORK TECHNOLOGY
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Warranty
THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS GUIDE ARE SUBJECT TO
CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS
GUIDE ARE BELIEVED TO BE ACCURATE AND PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR USE OF PRODUCTS.
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Hereby, Yealink(Xiamen) Network Technology CO., LTD. declares that this phone is in conformity with the
essential requirements and other relevant provisions of the CE, FCC.
You can find the CE and FCC information from the label on the back of the VC400/120 Codec.
Statements of compliance can be obtained by contacting [e-mail].
CE Mark Warning
This device is marked with the CE mark in compliance with EC Directives 2014/30/EU and 2014/35/EU.
Part 15 FCC Rules
Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's
authority to operate the equipment.
This device is compliant with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
1. This device may not cause harmful interference, and

2. This device must accept any interference received, including interference that may cause undesired operation.
Industry Canada (IC)
This Class [B] digital apparatus complies with Canadian ICES-003 Rules.
Class B Digital Device or Peripheral
Note: This device is tested and complies with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following measures:
1. Reorient or relocate the receiving antenna.
2. Increase the separation between the equipment and receiver.
3. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
4. Consult the dealer or an experience radio/TV technician for help.
WEEE Warning
To avoid potential effects on the environment and human health as a result of the presence of
hazardous substances in electrical and electronic equipment, end users of electrical and electronic
equipment should understand the meaning of the crossed-out wheeled bin symbol. WEEE must not
be regarded as unsorted municipal waste and must be collected and disposed of separately by a
competent authority.
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Administrator’s Guide for Yealink Video Conferencing Systems

About This Guide
v
About This Guide
The VC400/VC120 video conferencing system represents a new generation of full
high-definition video conferencing launched by Yealink. It features, in addition to a
high-definition audio-visual experience, flexible compatibility, easy deployment and intelligent
network adaptation. With high product standards, it is an ideal choice for SMEs. The
VC400/VC120 video conferencing system allows branch offices, as well as branch and head
offices, to communicate flexibly and cooperate efficiently.
The guide is intended for administrators who need to configure, customize, manage, and
troubleshoot the video conferencing system properly, rather than for end-users. It provides
details on the functionality and configuration of the Yealink video conferencing system.
Many of the features described in this guide involve network and account settings, which could
affect the system’s performance in the network. Therefore, an understanding of IP networking
and a prior knowledge of VoIP telephony concepts are necessary.
Documentations
This guide covers the VC400/VC120 video conferencing system. In addition to the administrator
guide, the following related documentations are available:
Quick Start Guide, which describes how to assemble the system and configure basic
network features on the system.
User Guides, which describe how to configure and use basic features available on the
systems.
Video Conference Room Deployment Solution, which describes the conference room
layout requirements and how to deploy the systems.
Network Deployment Solution, which describes how to deploy network for your systems.
You can download the above documentations from Yealink website:
http://support.yealink.com/documentFront/forwardToDocumentFrontDisplayPage
For support or service, please contact your Yealink reseller or go to Yealink Technical Support
online: http://www.yealink.com/Support.aspx .
Firmware
Common reasons for updating firmware include fixing bugs or adding features to the device.
You can download the latest firmware for your product online:
http://support.yealink.com/documentFront/forwardToDocumentFrontDisplayPage
For more information on how to upgrade the system firmware, refer to Upgrading System
Firmware on page 249.

Administrator’s Guide for Yealink Video Conferencing Systems
vi
In This Guide
This administrator guide includes the following chapters:
Chapter 1, “System Overview” describes system components, icons and Indicator LEDs.
Chapter 2, “Getting Started” describes how to install and start up the system and
configuration methods.
Chapter 3, “Configuring Network”describes how to configure network features on the
system.
Chapter 4, “Configuring Call Preferences” describes how to configure call preferences on
the system.
Chapter 5, “Configuring System Settings” describes how to configure basic, audio and
video features on the system.
Chapter 6, “System Management” describes how to manage system contacts and call
history.
Chapter 7, “Configuring Security Features” describes how to configure security features on
the system.
Chapter 8, “System Maintenance” describes how to upgrade system firmware and reset the
system.
Chapter 9, “Troubleshooting” describes how to troubleshoot the system and provides
some common troubleshooting solutions.
Summary of Changes
This section describes the changes to this guide for each release and guide version.
Changes for Release 22, Guide Version 22.15
The following section is new for this version:
Logging into the StarLeaf Cloud Platform on page 105
Account Polling on page 129
Major updates have occurred to the following sections:
H.323 Tunneling on page 73
H.460 Firewall Traversal on page 91
Methods of Transmitting DTMF Digit on page 132
Dual-Stream Protocol on page 183
Camera Control Protocol on page 195
H.235 on page 243

About This Guide
vii
Changes for Release 22, Guide Version 22.5
The following sections are new for this version:
Remote Control via Web User Interface on page 32
Auto Dialout Mute on page 144
Meeting Blacklist on page 171
USB Configuration on page 200
Upgrading VCC20 Camera Firmware on page 250
Major updates have occurred to the following sections:
Icon Instructions on page 25
Keep Alive on page 88
Configuring Cloud Settings on page 101
DTMF on page 131
Dual-Stream Protocol on page 183
Camera Control Protocol on page 195
Secure Real-Time Transport Protocol on page 239
Changes for Release 21, Guide Version 21.20
The following sections are new for this version:
Keyboard Input Method on page 176
Configuring Cloud Settings on page 101
Major updates have occurred to the following sections:
Icon Instructions on page 25
Setup Wizard on page 40
Directory on page 209
Changes for Release 21, Guide Version 21.15
The following section is new for this edition:
IPv6 Support on page 56
Hiding Icons in a Call on page 172
Output Resolution on page 199
Video Recording on page 201
Screenshot on page 203

Administrator’s Guide for Yealink Video Conferencing Systems
viii
VCS Integrated with Control Systems on page 226
Major updates have occurred to the following sections:
Packaging Contents on page 3
System Component Instructions on page 10
Configuring LAN Properties on page 48
Search Source List in Dialing on page 221
8-Way Conference License on page 224
Changes for Release 20, Guide Version 20.6
The following sections are new for this version:
Firmware on page v
Physical Features on page 2
VCM30 Video Conferencing Microphone Array on page 20
Remote Control Battery Safety Information on page 38
Static DNS on page 50
STUN on page 84
Keep Alive on page 88
Rport on page 90
DTMF on page 131
Video Codecs on page 138
Ringback Timeout on page 149
Auto Refuse Timeout on page 150
SIP IP Call by Proxy on page 151
Meeting Password on page 168
Meeting Whitelist on page 169
License on page 223
Major updates have occurred to the following sections:
Packaging Contents on page 3
VCC18/VCC20 HD Camera on page 12
VCR10 Remote Control on page 23
LED Instructions on page 29
System Installation on page 33
VLAN on page 61

About This Guide
ix
Configuring the System for Use with a Firewall or NAT on page 77
H.460 Firewall Traversal on page 91
Configuring SIP Settings on page 122
Audio Setting on page 177
Dual-Stream Protocol on page 183
Camera Control Protocol on page 195
Dual Screen on page 221
H.235 on page 243
Capturing Packets on page 260

Administrator’s Guide for Yealink Video Conferencing Systems
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Table of Contents
xi
Table of Contents
About This Guide ...................................................................... v
Documentations.................................................................................................................................v
Firmware ............................................................................................................................................v
In This Guide ..................................................................................................................................... vi
Summary of Changes ........................................................................................................................vi
Changes for Release 22, Guide Version 22.15 ............................................................................ vi
Changes for Release 22, Guide Version 22.5 ............................................................................. vii
Changes for Release 21, Guide Version 21.20 ........................................................................... vii
Changes for Release 21, Guide Version 21.15 ........................................................................... vii
Changes for Release 20, Guide Version 20.6 ............................................................................ viii
Table of Contents..................................................................... xi
System Overview....................................................................... 1
VoIP Principles ...................................................................................................................................1
Physical Features ................................................................................................................................2
Packaging Contents ...........................................................................................................................3
VC400 Packaging Contents .........................................................................................................3
VC120 Packaging Contents .........................................................................................................6
System Component Instructions ......................................................................................................10
VC400/VC120 Codec.................................................................................................................10
VCC18/VCC20 HD Camera ........................................................................................................ 12
Video Conferencing Phone .......................................................................................................14
CPE80 Expansion Microphone...................................................................................................19
VCM30 Video Conferencing Microphone Array ........................................................................20
VCR10 Remote Control .............................................................................................................23
Icon Instructions...............................................................................................................................25
Icons on Display Device ............................................................................................................25
Icons on the Video Conferencing Phone ................................................................................... 27
LED Instructions ...............................................................................................................................29
User Interfaces .................................................................................................................................30
Web User Interface ...................................................................................................................30
Remote Control.........................................................................................................................31
Getting Started........................................................................ 33
System Installation ...........................................................................................................................33

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xii
Installing the VC400 Video Conferencing System......................................................................34
Installing the VC120 Video Conferencing System......................................................................35
Installing the Camera ................................................................................................................36
Installing Batteries in the Remote Control.................................................................................38
Powering the System On and Off .....................................................................................................39
System Initialization .........................................................................................................................39
System Startup.................................................................................................................................40
Setup Wizard....................................................................................................................................40
Enabling Communication with Other Systems..................................................................................44
Placing a Test Call from VCS.............................................................................................................45
Configuring Network .............................................................. 47
Preparing the Network..................................................................................................................... 47
Configuring LAN Properties .............................................................................................................48
DHCP ........................................................................................................................................48
Configuring Network Settings Manually ................................................................................... 52
IPv6 Support .............................................................................................................................56
Configuring Network Speed and Duplex Mode................................................................................ 60
VLAN................................................................................................................................................61
LLDP..........................................................................................................................................62
Manual Configuration for VLAN................................................................................................65
DHCP VLAN .............................................................................................................................. 67
802.1X Authentication......................................................................................................................68
H.323 Tunneling ...............................................................................................................................73
Configuring the System for Use with a Firewall or NAT ....................................................................77
Reserved Ports ..........................................................................................................................78
Network Address Translation ....................................................................................................80
H.460 Firewall Traversal............................................................................................................. 91
Intelligent Firewall Traversal .............................................................................................................93
Quality of Service .............................................................................................................................94
VPN..................................................................................................................................................97
Configuring Call Preferences .................................................101
Configuring Cloud Settings ............................................................................................................101
Logging into the Yealink Cloud Platform ................................................................................101
Logging into the StarLeaf Cloud Platform ...............................................................................105
Logging into the Zoom Cloud Platform ..................................................................................106
Registering a Pexip Account....................................................................................................108
Logging into the BlueJeans Cloud Platform ............................................................................111
Logging into the Mind Platform..............................................................................................113
Registering a Custom Account................................................................................................115
Configuring the Third-party Virtual Meeting Room ................................................................118
Configuring SIP Settings.................................................................................................................122

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SIP Account.............................................................................................................................122
SIP IP Call ................................................................................................................................124
Configuring H.323 Settings ............................................................................................................126
Account Polling..............................................................................................................................129
DTMF .............................................................................................................................................131
Methods of Transmitting DTMF Digit......................................................................................132
Codecs ...........................................................................................................................................137
Audio Codecs.......................................................................................................................... 137
Video Codecs ..........................................................................................................................138
Call Protocol................................................................................................................................... 140
Do Not Disturb............................................................................................................................... 141
Auto Answer...................................................................................................................................143
Auto Dialout Mute ......................................................................................................................... 144
Call Match ......................................................................................................................................145
History Record ............................................................................................................................... 146
Bandwidth...................................................................................................................................... 147
Ringback Timeout ..........................................................................................................................149
Auto Refuse Timeout......................................................................................................................150
SIP IP Call by Proxy.........................................................................................................................151
Default Layout of Single Screen .....................................................................................................153
Configuring System Settings .................................................155
General Setting ..............................................................................................................................155
Site Name ...............................................................................................................................155
Backlight of the Video Conferencing Phone............................................................................156
Language ................................................................................................................................157
Date & Time............................................................................................................................158
Automatic Sleep Time ............................................................................................................. 164
Hide IP Address....................................................................................................................... 165
Relog Offtime..........................................................................................................................166
Key Tone .................................................................................................................................167
Meeting Password...................................................................................................................168
Meeting Whitelist....................................................................................................................169
Meeting Blacklist.....................................................................................................................171
Hiding Icons in a Call ..............................................................................................................172
Keyboard Input Method..........................................................................................................176
Audio Setting .................................................................................................................................177
Audio Output Device ..............................................................................................................177
Audio Input Device .................................................................................................................178
Adjusting MTU of Video Packets ....................................................................................................181
Dual-Stream Protocol.....................................................................................................................183
Mix Sending ...................................................................................................................................187
Configuring Camera Settings .........................................................................................................188
Far-end Camera Control.................................................................................................................193

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xiv
Camera Control Protocol................................................................................................................ 195
Output Resolution..........................................................................................................................199
USB Configuration.......................................................................................................................... 200
Video Recording ............................................................................................................................201
Screenshot .....................................................................................................................................203
Tones .............................................................................................................................................204
System Management .............................................................209
Directory ........................................................................................................................................209
LDAP ..............................................................................................................................................214
Call History.....................................................................................................................................219
Search Source List in Dialing ..........................................................................................................221
Dual Screen....................................................................................................................................221
Default Layout of Dual Screen................................................................................................. 222
License ...........................................................................................................................................223
Device Type License ................................................................................................................ 223
8-Way Conference License...................................................................................................... 224
VCS Integrated with Control Systems............................................................................................. 226
Configuring Security Features................................................227
User Mode ..................................................................................................................................... 227
Administrator Password .................................................................................................................228
Web Server Type ............................................................................................................................229
Transport Layer Security.................................................................................................................232
Secure Real-Time Transport Protocol ............................................................................................. 239
H.235.............................................................................................................................................. 243
Attack Defense in Public Network ..................................................................................................245
Abnormal Call Answering........................................................................................................245
Configuring Safe Mode Call .................................................................................................... 246
System Maintenance ..............................................................249
Upgrading System Firmware .......................................................................................................... 249
Upgrading VCC20 Camera Firmware .............................................................................................. 250
Importing/Exporting Configuration................................................................................................250
Resetting to Factory ....................................................................................................................... 251
SNMP............................................................................................................................................. 252
Troubleshooting.....................................................................257
Troubleshooting Methods.............................................................................................................. 257
Viewing Log Files ....................................................................................................................257
Capturing Packets ...................................................................................................................260

Table of Contents
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Getting Information from Status Indicators.............................................................................263
Analyzing Configuration Files..................................................................................................264
Viewing Call Statistics..............................................................................................................264
Using Diagnostic Methods ......................................................................................................264
Troubleshooting Solutions .............................................................................................................266
General Issues .........................................................................................................................267
Camera Issues .........................................................................................................................268
Video & Audio Issues..............................................................................................................269
Why does the far-site display black screen when local starts a presentation? .........................271
System Maintenance...............................................................................................................272
Appendix................................................................................275
Appendix A: Time Zones ................................................................................................................275
Appendix B: Trusted Certificates.....................................................................................................278
Index ......................................................................................281

Administrator’s Guide for Yealink Video Conferencing Systems
xvi

System Overview
1
System Overview
This chapter contains the following information about VC400/VC120 video conferencing system:
VoIP Principles
Physical Features
Packaging Contents
System Component Instructions
Icon Instructions
LED Instructions
User Interfaces
VoIP Principles
VoIP
VoIP (Voice over Internet Protocol) is a technology that uses the Internet Protocol instead of
traditional Public Switch Telephone Network (PSTN) technology for voice communications.
It is a family of technologies, methodologies, communication protocols, and transmission
techniques for the delivery of voice communications and multimedia sessions over IP networks.
The H.323 and Session Initiation Protocol (SIP) are two popular VoIP protocols that are found in
widespread implementation.
H.323
H.323 is a recommendation from the ITU Telecommunication Standardization Sector (ITU-T)
that defines the protocols to provide audio-visual communication sessions on any packet
network. The H.323 standard addresses call signaling and control, multimedia transport and
control, and bandwidth control for point-to-point and multi-point conferences.
It is widely implemented by voice and video conference equipment manufacturers, is used
within various Internet real-time applications, such as GnuGK and NetMeeting, and is widely
deployed by service providers and enterprises for both voice and video services over IP
networks.

Administrator’s Guide for Yealink Video Conferencing Systems
2
SIP
SIP (Session Initiation Protocol) is the Internet Engineering Task Force’s (IETF’s) standard for
multimedia conferencing over IP. It is an ASCII-based, application-layer control protocol
(defined in RFC 3261) that can be used to establish, maintain, and terminate calls between two
or more system. Like other VoIP protocols, SIP is designed to address the functions of signaling
and session management within a packet telephony network. Signaling allows call information
to be carried across network boundaries. Session management provides the ability to control
the attributes of an end-to-end call.
Physical Features
Video conferencing systems are in the overall network topology, which are designed to
interoperate with other compatible equipment, including application servers, media servers,
Internet-working gateways, and other systems.
In order to operate systems in your network successfully, the systems must meet the following
requirements:
A working IP network is established.
VoIP gateway is configured for SIP or H.323, and H.323 gatekeeper is configured for H.323.
You can also deploy Cloud server for Cloud platform.
The latest (or compatible) firmware of system is available.
A call server is active and configured to receive and send SIP/H.323 messages.
The VC400 and the VC120 have same physical interfaces, camera parameters and video
resolutions.
VC400/VC120 Codec Interface
-2 x HDMI
-1x DVI
-1x VGA
-1xVCS phone port(RJ-45)
-1x10/100/1000M Ethernet
-1 x Line-in (3.5mm)
-1 x Line-out (3.5mm)
-2 x USB2.0 port
-1 x power port
-Others: 1 x power key, 1 x security lock slot, 1 x reset slot

System Overview
3
Full-HD Camera
-1920x1080 video resolution
-Up to 18x optical zoom PTZ camera
-Pan range: ±100°
-Tilt range: ±30°
-Up to 10 preset positions
-Beauty shot feature
Video Resolution
-Full-HD 1080P at 30fps (1920x1080), from 1Mbps
-720P (1280x720), from 512Kbps
-W448P (768 x 448), WQVGA (400 x 240)
-4CIF (704×576), CIF (352 x 288)
Packaging Contents
We recommend that you use the accessories provided or approved by Yealink. The use of
unapproved third-party accessories may result in reduced performance
VC400 Packaging Contents
The following items are included in your package. If you find that anything is missing, contact
your system administrator.
VC400 Codec
VCC18 HD Camera

Administrator’s Guide for Yealink Video Conferencing Systems
4
VCP40 Video Conferencing Phone
L-Bracket (for installing the camera)
Camera Mounting Accessories
VCR10 Remote Control
AAA Batteries×2
Power Adapter