Yealink VC Series Administrator's Manual
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Yealink VC Series Administrator's Manual

Yealink VC Series Administrator's Manual

Yealink vc series video conferencing system
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  • Page 2 Administrator‘s Guide for Yealink Video Conferencing Systems Copyright © 2015 YEALINK NETWORK TECHNOLOGY Copyright © 2015 Yealink Network Technology CO., LTD. All rights reserved. No parts of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, photocopying, recording, or otherwise, for any purpose, without the express written permission of Yealink Network Technology CO., LTD.
  • Page 3 WEEE must not be regarded as unsorted municipal waste and must be collected and disposed of separately by a competent authority. We are striving to improve our documentation quality and we appreciate your feedback. Email your opinions and comments to DocsFeedback@yealink.com.
  • Page 4 Administrator‘s Guide for Yealink Video Conferencing Systems...

  • Page 5: About This Guide

    You can download the above documentations from Yealink website: http://www.yealink.com/DocumentDownload.aspx?CateId=142&flag=142 For support or service, please contact your Yealink reseller or go to Yealink Technical Support online: http://www.yealink.com/Support.aspx. This administrator guide includes the following chapters: Chapter 1, ―System...
  • Page 6 Administrator‘s Guide for Yealink Video Conferencing Systems 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...

  • Page 7: Table Of Contents

    Connecting the CPE80 Expansion Microphone ..............21 Powering the System On and Off .................... 22 System Initialization ......................... 22 System Startup ......................... 23 Setup Wizard ..........................23 Placing a Test Call from the Yealink VCS System ..............27 Configuring Network .............. 29...
  • Page 8 Administrator‘s Guide for Yealink Video Conferencing Systems Preparing the Network......................29 Configuring LAN Properties ..................... 30 DHCP ..........................30 Configuring Network Settings Manually ................33 Configuring Network Speed and Duplex Mode ..............35 LLDP ............................37 VLAN ............................41 802.1X Authentication ......................44 H.323 Tunneling ........................
  • Page 9 Table of Contents Dual-Stream Protocol ......................101 Mix Sending ........................... 102 Configuring Camera Settings ....................103 Far Control of Near Camera ....................107 Camera Control Protocol ....................... 109 Tones ............................110 System Management ............115 Local Directory ........................115 LDAP ............................120 Call History ..........................
  • Page 10 Administrator‘s Guide for Yealink Video Conferencing Systems Appendix ................165 Appendix A: Time Zones ....................... 165 Appendix B: Trusted Certificates ................... 167 Index ..................169...

  • Page 11: System Overview

    System Overview This chapter contains the following information about VC400/VC120 video conferencing system: VoIP Principles  Packaging Contents  System Component Instructions  Icon Instructions  LED Instructions  User Interfaces  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.

  • Page 12: Vc400/Vc120 Codec

    Administrator‘s Guide for Yealink Video Conferencing Systems calls between two or more endpoints. 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.

  • Page 13: Vcp40 Video Conferencing Phone

    System Overview VCP40 Video Conferencing Phone  VCR10 Remote Control  2 AAA Batteries  Power Adapter  Cables (for VC400) ...
  • Page 14 Administrator‘s Guide for Yealink Video Conferencing Systems Cables (for VC120)  7 Cable Ties  Quick Start Guide  Check the list before installation. If you find anything missing, contact your system administrator. The following item is an optional accessory for the VC400/VC120 system. You can buy it separately if necessary.
  • Page 15 System Overview VC400/VC120 codec supports 1080P full HD video. It supports both H. 323 and SIP protocols and can connect to a mainstream video conferencing system. Strong audio/video processing ability, rich interfaces, compatibility with different display devices and adaptive resolution make it easy to use. VC400/VC120 codec front panel...
  • Page 16 Administrator‘s Guide for Yealink Video Conferencing Systems VC400/VC120 codec back panel Port Name Description Power Button Powers the system on or off ① LED Indicator Indicates the system statuses ② Inserts a USB flash drive to the port for storing ③...
  • Page 17 (± 100 degrees range), tilted (± 30 degrees range). Infrared Sensor The infrared sensor is located within the Yealink logo. Aim the remote control at the camera IR sensor to operate the unit. The VCP40 video conferencing phone can be used as the speakerphone and...
  • Page 18 Administrator‘s Guide for Yealink Video Conferencing Systems meters to achieve ultra-HD voice. You can place calls, answer calls or view directory and call history on the VCP40 phone.
  • Page 19 System Overview System component instructions for the VCP40 phone are: Item Description Shows information about calls, messages, soft keys, time, date and other relevant data: • Call information—call duration LCD Screen ① • Icons (for example, • Missed call information •...
  • Page 20 Administrator‘s Guide for Yealink Video Conferencing Systems VCR10 remote control is compact, and has definite function zoning. Users can organize conferences easily using infrared signals. Hardware components of the remote control: Item Description ① Sleep Key Puts the system to sleep or wakes the system up.
  • Page 21 System Overview Item Description Located at the bottom right of the screen. Label automatically identifies context-sensitive features. ④ Blue Shortcut Key In the idle screen, this is used to save and check the camera preset position, and corresponds to the Preset soft key.
  • Page 22 Administrator‘s Guide for Yealink Video Conferencing Systems Item Description Captures the on-screen image of the display device  when the phone is idle. Icons appearing on the display device are described in the following table: Icon Description Network is disconnected...
  • Page 23 System Overview Icon Description Call mute Call encryption The content of the local camera Focus content Camera position Record a video Dialed calls Received calls Missed calls Dual screen mode Dual video sources (when a PC is connected to the PC port on the VC400/VC120 codec) A USB flash drive is inserted to the USB port on the VC400/VC120 codec...
  • Page 24 Administrator‘s Guide for Yealink Video Conferencing Systems Icon Description H.323 account is registered (the icon flashes when the H.323 account is not registered successfully) Auto answer Do not disturb Call is muted Volume is 0 A USB flash drive is inserted into the port on...

  • Page 25: Remote Control

    System Overview Indicator LED on the camera: LED Status Description The camera is connected properly to the VC400/VC120 Solid green codec, and the VC400/VC120 codec is powered on. Solid red The VC400/VC120 codec is in the sleep mode. Flashing green Press the key on the remote control.
  • Page 26 Administrator‘s Guide for Yealink Video Conferencing Systems You can use the remote control and display device to configure and use the VC400/VC120 video conferencing system. For more information about the function of each key on the remote control, refer to VCR10 Remote Control on page10.

  • Page 27: Getting Started

    If dual screen mode is required, you can connect another display device to the Display2 port. Because the DVI cable is tailor-made, please use the Yealink-supplied DVI cable. To prevent shock damage, do not connect the power adapter and turn on the power before connecting all system components.
  • Page 28 Administrator‘s Guide for Yealink Video Conferencing Systems Do the following: Connect the supplied 2m Ethernet cable to the Internet port on the VC400/VC120 codec and the switch/hub device port. Connect the DVI cable to the Camera port on the VC400/VC120 codec and the camera.
  • Page 29 Getting Started You can mount the camera on to the TV or a wall based on your actual needs. Mounting the Camera on the TV When your TV is less than 120 mm thick, you can mount the camera on to your TV. Do the following: Lock the camera to the L-bracket.
  • Page 30 Administrator‘s Guide for Yealink Video Conferencing Systems Lock the L-bracket with the M3× 8 screws. Move the setscrews on the L-bracket to the left holes. Lock the L-bracket to the wall with T4× 30 screws. Connect one end of the DVI cable to the camera and put the other end of the cable through the L-bracket.
  • Page 31 Getting Started Do the following: Open the battery cover on the back of the remote control. Insert the batteries with the correct polarity. Replace the battery cover. Dispose of waste batteries properly. Note Remove the batteries if they are not in use for a long period of time. If your video conferencing room is large, you can add an extra CPE80 expansion microphone to the MIC port on the VCP40 phone to expand the audio range of the conference phone.
  • Page 32 Administrator‘s Guide for Yealink Video Conferencing Systems Note Caution! To avoid corrupting the system, you should always power off the system using the power button on the VC400/VC120 codec. After turning the power off in this way, wait at least 15 seconds before you unplug the power adapter from the VC400/VC120 codec.
  • Page 33 Getting Started Gateway  Primary DNS (Domain Name Server)  Secondary DNS  You need to configure the network settings of the system manually if any of them are not provided by the DHCP server. For more information about configuring network settings manually, refer to Configuring Network Settings Manually on page 33.
  • Page 34 Administrator‘s Guide for Yealink Video Conferencing Systems To complete the setup wizard via the remote control: Set the language displayed on the display device. The default language is English. Press (Next soft key) to continue. Set the date and time (e.g., set the time zone, time format, date format and the type of the dalight saving time).
  • Page 35 (Next soft key) to continue or press (Previous soft key) to return to the previous screen. Edit the site name. The default site name is‖ Yealink VC400/VC120‖. Press (Next soft key) to continue or press (Previous soft key) to return to the previous screen.
  • Page 36 Administrator‘s Guide for Yealink Video Conferencing Systems Press (Next soft key) to continue or press (Previous soft key) to return to the previous screen. The display device displays firewall port mapping information. Press (Next soft key) to continue or press (Previous soft key) to return to the previous screen.
  • Page 37 Resetting to Factory on page 148. Yealink Demo1 to Yealink Demo3 are three default contacts stored in the local directory. You can place a test call to the default contact, and the test call will be routed to the Yealink demo video conferencing system. Yealink demo contacts can help users to test...
  • Page 38 Administrator‘s Guide for Yealink Video Conferencing Systems...

  • Page 39: Configuring Network

    Configuring Network This chapter provides information on how to configure network settings for the system. Proper network settings allow the system work efficiently in your network environment. This chapter provides the following sections: Preparing the Network  Configuring LAN Properties ...
  • Page 40 Administrator‘s Guide for Yealink Video Conferencing Systems Type Network Information 802.1X Authentication information DHCP (Dynamic Host Configuration Protocol) is a network protocol used to dynamically allocate network parameters to network hosts. The automatic allocation of network parameters to hosts eases the administrative burden of maintaining an IP network. The system complies with the DHCP specifications documented in RFC 2131.
  • Page 41 Configuring Network Parameter DHCP Option Description Specifies the domain name that client should Domain Server use when resolving hostnames via DNS. Broadcast Specifies the broadcast address in use on the Address client's subnet. Network Time Specifies a list of the NTP servers available to Protocol the client by IP address.
  • Page 42 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method messages, it will report the configured host name to the DHCP server via DHCP option 12. Host name is optional, so it is not a mandatory configuration item. For more information, contact your network administrator.
  • Page 43 Configuring Network Press the Save soft key to accept the change. The display device prompts ―Reboot now?‖. Select OK to reboot the system immediately. If DHCP is disabled or the system cannot obtain network settings from the DHCP server, you need to configure them manually for the system to establish network connectivity. Network parameters need to be configured manually on the system are described below.
  • Page 44 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method Default: Blank Note: If you change this parameter, the system will reboot to implement the changes. Configures the secondary DNS server assgined to the system. Remote Control Default: Blank...
  • Page 45 Configuring Network Uncheck the DHCP checkbox. Enter the preferred values in the IP Address, Subnet Mask, Gateway, DNS Primary Server and DNS Secondary Server fields respectively. Press the Save soft key to accept the change. The display device prompts ―Reboot now?‖. Select OK to reboot the system immediately.
  • Page 46 Administrator‘s Guide for Yealink Video Conferencing Systems same time; this means one system can send data on the line while also receiving data. Parameter of network speed feature on the system is described below: Parameter Description Configuration Method Specifies the network speed and duplex mode for the system to use.
  • Page 47 Configuring Network Select the desired value from the pull-down list of Network Speed. Click Confirm to accept the change. A dialog box pops up to prompt that settings will take effect after a reboot. Click Confirm to reboot the system immediately. LLDP (Linker Layer Discovery Protocol) is a vendor-neutral Link Layer protocol, which allows the system to receive and/or transmit device-related information from/to directly connected devices on the network that are also using the protocol, and store the...
  • Page 48 Administrator‘s Guide for Yealink Video Conferencing Systems extension to LLDP that operates between endpoint devices and network connectivity devices. LLDP-MED provides the following capabilities for the system: Capabilities Discovery -- allows LLDP-MED system to determine the capabilities  that the connected switch supports and has enabled.
  • Page 49 Configuring Network TLV Type TLV Name Description Auto-Negotiation is: 100BASE-TX (full duplex mode) 100BASE-TX (half duplex mode) 10BASE-T (full duplex mode) 10BASE-T (half duplex mode) The MED device type of the system and the supported LLDP-MED TLV type can be encapsulated in LLDPDU.
  • Page 50 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method to implement the changes. Configures the interval (in seconds) for the system to send LLDP requests. Remote Control Packet Default: 60 Interval(1-3600s) Web User Interface Note: If you change this parameter, the system will reboot to implement the changes.
  • Page 51 DHCP , the system will examine the DHCP option for a valid VLAN ID. The predefined option 132 is used to supply the VLAN ID by default. You can customize the DHCP option used to request the VLAN ID. VLAN Feature on Yealink IP Phones For more information about VLAN, refer to , available online: http://www.yealink.com/DocumentDownload.aspx?CateId=142&flag=142.
  • Page 52 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method 7 is the highest priority, 0 is the lowest priority. Default: 0 Note: If you change this parameter, the system will reboot to implement the changes. Enables or disables the DHCP VLAN discovery feature on the system.
  • Page 53 Configuring Network Select the desired value (0-7) from the pull-down list of Priority. Click Confirm to accept the change. A dialog box pops up to prompt that the settings will take effect after a reboot. Click Confirm to reboot the system immediately. To configure DHCP VLAN discovery via the web user interface: Click on Network->Advanced.

  • Page 54: X Authentication

    Administrator‘s Guide for Yealink Video Conferencing Systems The default option is 132. Click Confirm to accept the change. A dialog box pops up to prompt that the settings will take effect after a reboot. Click Confirm to reboot the system immediately.
  • Page 55 The system supports the authentication protocols EAP-MD5, EAP-TLS, PEAP-MSCHAPv2 and EAP-TTLS/EAP-MSCHAPv2 for 802.1X authentication. Yealink 802.1X Authentication For more information about 802.1X authentication, refer to available online: http://www.yealink.com/DocumentDownload.aspx?CateId=142&flag=142.
  • Page 56 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method PEAP-MSCHAPV2 or EAP-TTLS/EAP-MSCHAPV2. Note: If you change this parameter, the system will reboot to implement the changes. Configures the access URL of the device certificate when the 802.1x authentication mode is Device configured as EAP-TLS.
  • Page 57 Configuring Network 1) Enter the user name for authentication in the Identity field. 2) Leave the MD5 Password field blank. 3) In the CA Certificates field, click Browse to locate the desired CA certificate (*.pem,*.crt, *.cer or *.der) from your local system. 4) In the Device Certificates field, click Browse to locate the desired client certificate (*.pem or *.cer) from your local system.
  • Page 58 Administrator‘s Guide for Yealink Video Conferencing Systems 4) Click Upload to upload the certificate. d) If you select EAP-TTLS/EAP-MSCHAPv2: 1) Enter the user name for authentication in the Identity field. 2) Enter the password for authentication in the MD5 Password field.

  • Page 59: H.323 Tunneling

    Configuring Network 4) Click Upload to upload the certificate. Click Confirm to accept the change. A dialog box pops up to prompt that the settings will take effect after a reboot. Click Confirm to reboot the system immediately. To configure the 802.1X via the remote control: Select Menu->Advanced (default default password: 0000) ->Advanced Network.
  • Page 60 Administrator‘s Guide for Yealink Video Conferencing Systems If H.323 tunneling feature is disabled, the setup processes of a H.323 call are shown below:...
  • Page 61 Configuring Network If H.323 tunneling feature is enabled, the setup processes of a H.323 call are shown below: The parameter of the H.323 tunneling feature on the system is described below: Parameter Description Configuration Method Enables or disables the H.323 Remote Control tunneling on the system.
  • Page 62 Administrator‘s Guide for Yealink Video Conferencing Systems Select the desired value from the pull-down list of H.323 Tunneling. Click Confirm to accept the change. To configure H.323 tunneling via the remote control: Select Menu->Advanced (default password: 0000) ->H.323. Check the H.323 Tunneling checkbox.
  • Page 63 Configuring Network Description Port Range Port Type mode) Reserved ports on the system. 50000-50499 TCP/UDP For more information, refer to Reserved (default range) Ports on page 53. HTTPS (Optional) H.323 1719 If the system and firewall are not properly configured, users placing calls through a firewall to systems may experience one-way audio or video.
  • Page 64 Administrator‘s Guide for Yealink Video Conferencing Systems Required ports for a SIP two-way call: Call Type Number of Required Ports Video 8 UDP ports (6 if presentation is disabled) Voice 2 UDP ports Each additional video participant requires 8 UDP ports.
  • Page 65 Configuring Network Parameter Description Configuration Method Configures the range of the TCP ports. Valid values: 1-65535 Default range: 50000-50499 Note: SIP and H.323 calls share the configured ports. A SIP call uses the higher half number of ports, and a H.323 call uses the Remote Control lower half number of ports.
  • Page 66 Administrator‘s Guide for Yealink Video Conferencing Systems To configure reserved ports via the remote control: Select Menu->Advanced (default password: 0000) ->NAT/Firewall. In the Reserved block, configure the range of the UDP ports and TCP ports. Press the Save soft key to accept the change.
  • Page 67 Configuring Network To configure NAT via the web user interface: Click on Network->NAT/Firewall. Select the desired value from the pull-down list of Static NAT. Configure the NAT public address in the NAT Public IP Address field if Manual is selected from the pull-down list of Static NAT. Click Confirm to accept the change.
  • Page 68 Administrator‘s Guide for Yealink Video Conferencing Systems To configure H.460 firewall traversal via the web user interface: Click on Account->H323. Select the desired value from the pull-down list of H.460 Active. Click Confirm to accept the change. To configure H.460 firewall traversal via the remote control: Select Menu->Advanced (default password: 0000) ->H.323.
  • Page 69 Configuring Network The intelligent firewall transversal parameter is described below: Parameter Description Configuration Method Enables or disables the intelligent firewall transversal Intelligent Firewall Web User Interface feature on the system. Transversal Default: Disabled To configure intelligent firewal transversal via the web user interface: Click on Network->NAT/Firewall.
  • Page 70 QoS only if the voice, video and data packets are given priority over other kinds of network traffic. Yealink video conferencing systems support the DiffServ model of QoS. DSCPs for voice, video and data packets that can be specified respectively.
  • Page 71 Configuring Network Data QoS To ensure good call quality, data packets (e.g., SIP signaling and H.225 call signaling) emanated from the system should be configured with a high transmission priority. QoS feature parameters on the system are described below. Parameter Description Configuration Method Specifies the DSCP value for...

  • Page 72: Vpn

    Administrator‘s Guide for Yealink Video Conferencing Systems In the QoS block, enter the desired values in the corresponding fields. Click Confirm to accept the change. A dialog box pops up to prompt that the settings will take effect after a reboot.
  • Page 73 The file format of the compressed package must be *.tar. The VPN-related files are: certificates (ca.crt and client.crt), key (client.key) and the configuration file (vpn.cnf) of the VPN client. For more information about how to OpenVPN Feature on Yealink IP Phones package a TAR file, refer to , available online: http://www.yealink.com/DocumentDownload.aspx?CateId=142&flag=142.
  • Page 74 Administrator‘s Guide for Yealink Video Conferencing Systems Select the desired value from the pull-down list of Active. Click Confirm to accept the change. A dialog box pops up to prompt that the settings will take effect after a reboot. Click Confirm to reboot the system immediately.

  • Page 75: Configuring Call Preferences

    Bandwidth  Yealink VC400/VC120 video conferencing systems support Session Initiation Protocol (SIP). If your network supports SIP , you can use SIP to connect IP calls. To connect IP calls using SIP , you need to configure a SIP account for the system.
  • Page 76 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method of SIP account for register Web User Interface authentication. Default: blank Configures the IP address or domain name of the SIP server Remote Control Server Host for the SIP account.
  • Page 77 Configuring Call Preferences Parameter Description Configuration Method Configures the DTMF type for the SIP account. INBAND—DTMF digits are  transmitted in the voice band. OUTBAND—DTMF digits are  DTMF Web User Interface transmitted by the SIP messages. RFC2833—DTMF digits are ...
  • Page 78 , and the LCD screen of the VCP40 phone displays Yealink VC400/VC120 video conferencing systems support H.323 protocol. If your network uses a gatekeeper, you can register an H.323 account for the system, and specify its H.323 name and extension. This allows others to call the system by entering the H.323 name or extension instead of the IP address.
  • Page 79 Configuring Call Preferences Parameter Description Configuration Method mode. Web User Interface Disabled—the system  does not use a gatekeeper. Auto—the system  automatically discovers a gatekeeper. Manual—specify the IP  address and port for the gatekeeper manually. Default: Disabled Remote Control Gatekeeper IP Configures the IP address of the Address 1...
  • Page 80 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method H.460 Firewall Traversalon page 57. Enables or disables the H.323 tunneling on the system. Remote Control H.323 Tunneling Default: Disabled Web User Interface For more information, refer to H.323 Tunneling on page 49.
  • Page 81 Configuring Call Preferences Configure the H.323 account settings. Click Confirm to accept the change. After successful registration, the display device displays , and the LCD screen of the VCP40 phone displays To configure H.323 account via the remote control: Select Menu->Advanced (default password: 0000) ->H323. Configure the H.323 account settings.
  • Page 82 Administrator‘s Guide for Yealink Video Conferencing Systems Codec Algorithm Bit Rate Sample Rate Reference PCMU G.711 64 Kbps 8 Ksps RFC 3551 PCMA G.711 64 Kbps 8 Ksps RFC 3551 Codecs parameters on the system are described below: Parameter Description...

  • Page 83: Call Type

    Configuring Call Preferences to place calls. Ensure the remote system supports the same ptotocol. The call type parameter on the system is described below: Parameter Description Configuration Method Specifies the preferred call type for placing calls. Auto—the system  automatically uses the available call type.

  • Page 84: Do Not Disturb

    Administrator‘s Guide for Yealink Video Conferencing Systems Do not Disturb allows the system to reject all incoming calls automatically. You can activate the DND mode for the system when it is idle, and the DND mode will be deactivated after the system places a call. You can also activate the DND mode for the system during a call, and the DND mode will be deactivated after the system ends the call.

  • Page 85: Auto Answer

    Configuring Call Preferences To configure DND during a call via the web user interface: Click Home. Check the DND checkbox. The display device will display , and the LCD screen of the VCP40 phone will display To configure DND during a call via the remote control: Press the More soft key.

  • Page 86: Call Match

    Administrator‘s Guide for Yealink Video Conferencing Systems Select the desired value from the pull-down list of Auto Answer. Select the desired value from the pull-down list of Auto Answer Mute. Select the desired value from the pull-down list of Auto Answer Multiway.

  • Page 87: History Record

    Configuring Call Preferences Parameter Description Configuration Method Default: Enabled To configure call match via the web user interface: Click on Setting->Call Features. Select the desired value from the pull-down list of Call Match. Click Confirm to accept the change. To configure call match via the remote control: Select Menu->Call Features.
  • Page 88 Administrator‘s Guide for Yealink Video Conferencing Systems To configure save call hisotry via the web user interface: Click on Setting->Call Features. Select the desired value from the pull-down list of History Record. Click Confirm to accept the change. To configure save call hisotry via the remote control: Select Menu->Call Features.

  • Page 89: Bandwidth

    Configuring Call Preferences Parameter Description Configuration Method system. Default: Auto If Auto is selected, the system will select the appropriate uplink bandwidth automatically. Specifies the maximum receiving bandwidth for the system. Remote Control Downlink Default: Auto Bandwidth Web User Interface If Auto is selected, the system will select the appropriate downlink bandwidth automatically.
  • Page 90 Administrator‘s Guide for Yealink Video Conferencing Systems...

  • Page 91: Configuring System Settings

    The site name parameter is described below: Parameter Description Configuration Method Configures the site name of the system. Valid values: String within 64 Remote Control characters Site Name Web User Interface Default: For VC400: Yealink VC400 For VC120: Yealink VC120...
  • Page 92 Administrator‘s Guide for Yealink Video Conferencing Systems To configure the site name via the web user interface: Click on Setting->General. Edit the site name in the Site Name field. Click Confirm to accept the change. The LCD screen of the display device and VCP40 will display the changed site name.
  • Page 93 Configuring System Settings Parameter Description Configuration Method the VCP40 phone. Default: Always On To configure the backlight of VCP40 phone via the web user interface: Click on Setting->General. Select the desired value from the pull-down list of Backlight Time. Click Confirm to accept the change. The default language of the LCD screen of the display device and the VCP40 is English, and you can change it via the remote control.
  • Page 94 Administrator‘s Guide for Yealink Video Conferencing Systems To specify the language for the web user interface via the web user interface: Click Language at the top of the web page. Select the desired language from the pull-down list of Language.
  • Page 95 Configuring System Settings summertime so that evenings have more daylight and mornings have less. Typically, clocks are adjusted forward one hour at the start of spring and backward in autumn. Many countries have used DST at various times, details vary by location. DST can be adjusted automatically from the time zone configuration.
  • Page 96 Administrator‘s Guide for Yealink Video Conferencing Systems Configuration Parameter Description Method Automatic-use DST.  DST will be configured automatically. You do not need to manually configure the start time, end time and offset. Default: Automatic Configures the DST calculation methods.
  • Page 97 Configuring System Settings Configuration Parameter Description Method Configures the time to start DST Start Day of Week Last DST. in Month Note: It only works if the value of the Daylight Saving Time is Start Hour of Day set to Enabled. When the DST calculation DST Stop Month method is set to By Week,...
  • Page 98 Administrator‘s Guide for Yealink Video Conferencing Systems Configuration Parameter Description Method DD MMM YYYY  WWW DD MMM  Default: YYYY-MM-DD To configure NTP server, time zone and DST via the web user interface: Click on Setting-> Date& Time. Select the desired value from the pull-down list of DHCP Time.
  • Page 99 Configuring System Settings Enter the end time in the End Date field. Mark the DST By Week radio box in the Fixed Type field. Select the desired values from the pull-down lists of DST Start Month, DST Start Day of Week, DST Start Day of Week Last in Month, DST Stop Month, DST Stop Day of Week and DST Stop Day of Week Last in Month.
  • Page 100 Administrator‘s Guide for Yealink Video Conferencing Systems Enter the desired time in the End Hour of Day field. Enter the desired offset time in the Offset (minutes) field. Click Confirm to accept the change. To configure the time and date manually via the web user interface: Click on Setting->...
  • Page 101 Configuring System Settings To configure the time and date format via the remote control: Select Menu->Basic->Date & Time. Configure the desired values.according to the need. Press the Save soft key to accept the change. The time and date displayed on the LCD screen of the display device and VCP40 phone will change accordingly.
  • Page 102 Administrator‘s Guide for Yealink Video Conferencing Systems Select desired value from the pull-down list of Automatic Sleep Time. Click Confirm to accept the change. To configure the automaticsleep time via the remote control: Select Menu->Basic. Select desired value from the pull-down list of Automatic Sleep Time.
  • Page 103 Configuring System Settings Select Enabled from the pull-down list of Hide IP Address. Click Confirm to accept the change. The IP address is hidden from the status bar of the display device. The system will log out of the web user interface automatically after being inactive for a period of time (default: 5 minutes).
  • Page 104 Administrator‘s Guide for Yealink Video Conferencing Systems Enter the desired time in the ReLogOffTime field. Click Confirm to accept the change. You can enable the key tone feature for the system to play a key tone when you press the key on the remote control. If you disable this feature, the system will not play a key tone when you press the key on the remote control.
  • Page 105 Configuring System Settings To configure he key tone via the remote control: Select Menu->Basic. Mark the radio box in the Key Tone field. Press the Save soft key to accept the change. The system supports the following audio output devices: HDMI (built-in speakerphone of the display device) ...
  • Page 106 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method speakerphone connected to the Line Out port on the VC400/VC120 codec. VCS Phone - selects the  VCP40 phone. Line out + HDMI -selects the  speakerphone connected to...
  • Page 107 Configuring System Settings The system supports the following audio input devices: Line Input (microphone connected to the Line In port on the VC400/VC120 codec)  VCS Phone (VCP40 phone)  By default, the system automatically selects the available audio input device. You can specify which audio input device to be used according to the current environment.
  • Page 108 Administrator‘s Guide for Yealink Video Conferencing Systems Select the desired value from the pull-down list of Audio Input. Click Confirm to accept the change. To configure the audio input device via the remote control: Select Menu->Video & Audio->Audio Settings. Select the desired value from the pull-down list of Audio Input.
  • Page 109 Configuring System Settings Parameter Description Configuration Method Valid values: Integer from 1 to 10 Default: 8 To configure the volume via the web user interface: Click on Setting->Video & Audio. Enter the desired value in the Ringer Volume field. Enter the desired value in the Output Volume field. Click Confirm to accept the change.
  • Page 110 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method Valid Values: Integer from 1000 to 1500 Default: 1500 Note: If you change this parameter, the system will reboot to implement the changes. To configure MTU via the web user interface: Click on Network->Advanced.
  • Page 111 The Yealink video conferencing system supports the standard H.239 protocol and BFCP (Binary Floor Control Protocol). H.239 protocol is used to send content in H.323 calls.
  • Page 112 Administrator‘s Guide for Yealink Video Conferencing Systems Select the desired value from the pull-down list of BFCP. Click Confirm to accept the change. Content sharing allows users to share content with other conference participants during a call. When a PC is connected to the PC port on the VC400/VC120 codec, the display device can display both the video and the shared content.
  • Page 113 Configuring System Settings In the Presentation block, select the desired value from the pull-down list of Mix. Click Confirm to accept the change. To display high quality video image, you can configure camera settings as required, such as white balance, exposure and sharpness. Camera settings parameters are described below.
  • Page 114 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method Disables or configures the value of camera flicker frequency. 50Hz  60Hz  Remote Control Default: 50Hz Flicker Web User Interface Note: Indoor lights powered by a 50Hz or 60Hz power source can produce a flicker.
  • Page 115 Configuring System Settings Parameter Description Configuration Method Configures the blue gain of the camera. Valid Values: 0-100 Remote Control Blue Gain Default: 69 Web User Interface Note: You can set this parameter only when the white balance mode is configured to Manual. Configures the saturation of the camera.
  • Page 116 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method (3D) mode. Web User Interface   Middle  High  Default: Off Enables or disables the reversed mode of the camera. Remote Control If the reversed mode is enabled,...
  • Page 117 Configuring System Settings Parameter Description Configuration Method also be cleared. To configure camera settings via the web user interface: Click on Setting->Camera. Configure the camera settings. Click Confirm to accept the change. To configure camera settings via the remote control: Select Menu->Video &...
  • Page 118 Administrator‘s Guide for Yealink Video Conferencing Systems Far control of the near camera parameters are described below. Parameter Description Configuration Method Enables or disables the far site to Remote Control Far Control Near control the near site camera. Camera Web User Interface...
  • Page 119 Configuring System Settings VC400/VC120 video conferencing systems support two camera control protocols: SIP and H.323. You can specify the camera control protocol for performing far control of the near camera. The camera control protocol should be the same as the protocol the call uses.
  • Page 120 Administrator‘s Guide for Yealink Video Conferencing Systems Select the desired value from the pull-down list of FECC(SIP). Click Confirm to accept the change. When automatically answering an incoming call, the system will play a warning tone. You can customize tones or select specialized tone sets (vary from country to country) to indicate different conditions of the system.
  • Page 121 Configuring System Settings Germany  Great Britain  Greece  Hungary  Lithuania  India  Italy  Japan  Mexico  New Zealand  Netherlands  Norway  Portugal  Spain  Switzerland  Sweden  Russia  United States ...
  • Page 122 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method Where element = [!]Freq1[+Freq2][+Freq3][+Freq4 ] /Duration Freq: the frequency of the tone (ranges from 200Hz to 7000 Hz). If it is set to 0Hz, it means the tone is not played. A tone consists of at most four different frequencies.
  • Page 123 Configuring System Settings Parameter Description Configuration Method For more information about how to customize the tone, refer to the parameter ―Ring Back‖. Default: Blank Note: It only works if the parameter ―Select Country‖ is set to Custom. Customizes the auto answer tone for the system.
  • Page 124 Administrator‘s Guide for Yealink Video Conferencing Systems...

  • Page 125: System Management

    System Management This chapter provides operating instructions, such as managing directory, call history and dual screen. Topics include: Local Directory  LDAP  Call History  Search Source List in Dialing  Dual Screen  The VC400 system can store up to 500 local contacts and 100 conference contacts. You can add multiple numbers for a contact (at most 3).
  • Page 126 Administrator‘s Guide for Yealink Video Conferencing Systems Click Add Number, enter other number of the contact. Click Confirm to accept the change. To add conference contacts via the web user interface: Click on Directory->Local Directory. Mark the checkboxes of the desired contacts.
  • Page 127 System Management If multiple numbers are stored for the selceted contacts, the system will select number 1 by default. Click Confirm to accept the change. To edit contacts via the web user interface: Click on Directory->Local Directory. Hover your cursor over the contact you want to edit. Click in the pop-up detail box.
  • Page 128 Administrator‘s Guide for Yealink Video Conferencing Systems The web user interface prompts‖ Connecting, please wait!‖ and jumps automatically to the Home screen. To import an XML file of the contact list via the web user interface: Click on Directory->Local Directory.
  • Page 129 System Management The web user interface is shown below: (Optional.) Check the The first line as the title checkbox. It will prevent importing the title of the contact information which is located in the first line of the CSV file. (Optional.) Check the Delete Old Contacts checkbox.
  • Page 130 LDAP (Lightweight Directory Access Protocol) is an application protocol for accessing and maintaining information services for the distributed directory over an IP network. Yealink VCS systems can be configured to interface with a corporate directory server that supports LDAP version 2 or 3. The following LDAP servers are supported: Microsoft Active Directory ...
  • Page 131 System Management local directory. LDAP entries displayed on the display devicescreen are read only. They cannot be added to, edited or deleted by users. When an LDAP server is configured properly, the system can look up entries from the LDAP server in a wide variety of ways. The LDAP server indexes all the data in its entries, and "filters"...
  • Page 132 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method LDAP searching. Example: (|(cn=%)(sn=%)) Configures the number attribute for LDAP searching. LDAP Number Example: Web User Interface Filter (|(telephoneNumber=%)(mobile =%)) LDAP Server Configures the domain name or Web User Interface Address IP address of the LDAP server.
  • Page 133 System Management Parameter Description Configuration Method the LDAP server. Note: multiple name attributes should be separated by spaces. Example: cn sn Configures the number attributes of each record to be returned by the LDAP server. LDAP Number Note: multiple numbers attributes Web User Interface Attributes should be separated by spaces.
  • Page 134 Administrator‘s Guide for Yealink Video Conferencing Systems Select the desired values from the corresponding pull-down lists. Click Confirm to accept the change. The VC400 video conferencing system maintains call history lists of All Calls, Missed Calls, Placed Calls and Received Calls. Call history lists supports up to 400 entries. You can view the call history, place a call or delete an entry from the call history list.
  • Page 135 System Management The web user interface displays all call history. Click All Calls, select the desired call history list. To place a call from the call history list via the web user interface: Click on Directory->History. The web user interface displays all call history. Hover your cursor over the entry you want to call.
  • Page 136 Administrator‘s Guide for Yealink Video Conferencing Systems The web user interface prompts‖Delete the callog?‖ Click Confirm to delete the callog. You can also select Delete All from the from the pull-down list of Delete Callog to delete all calllog. When you enter a few characters in the dialing screen, the system will search matching contacts from the enabled search source lists, and display the result in the dialing screen.
  • Page 137 System Management To adjust the display order of the enabled list, select the desired list, and click Click Confirm to accept the change. The VC400 / VC120 has two display ports. When connecting only one display device to the VC400/VC120 codec, Display1 port is the only available port. To make it easier for users to view video images, users can connect two display devices to Display1 and Display2.
  • Page 138 Administrator‘s Guide for Yealink Video Conferencing Systems...

  • Page 139: Configuring Security Features

    Configuring Security Features This chapter provides information for making configuration changes for the following security-related features: User Mode  Administrator Password  Web Server Type  Transport Layer Security  Secure Real-Time Transport Protocol  H.235  Users can access the system menu options directly (except the ―Advanced‖ menu option) on the display device.
  • Page 140 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method or login to the web user interface. Note: It can only be configured when the user mode is enabled. The system supports ASCII characters 32-126(0x20-0x7E) in passwords. You can leave the password blank.
  • Page 141 Configuring Security Features Parameter Description Configuration Method Enters the old administrator password. Remote Control Old Password Note: The default administrator Web User Interface password is ―0000‖. Configures a new administrator password. Remote Control New Password Note: You can leave the Web User Interface password blank.
  • Page 142 Administrator‘s Guide for Yealink Video Conferencing Systems Web server type determines the access protocol of the system‘s web user interface. The system supports both HTTP and HTTPS protocols for accessing the web user interface. HTTP is an application protocol that runs on top of the TCP/IP suite of protocols. HTTPS is a web protocol that encrypts and decrypts user page requests as well as the pages returned by the web server.
  • Page 143 Configuring Security Features Parameter Description Configuration Method Default: 443 Note: Ensure that the configured port is not used. If you change this parameter, the system will reboot to implement the changes. To configure web server type via the web user interface: Click on Network->Advanced.
  • Page 144 Administrator‘s Guide for Yealink Video Conferencing Systems Select Menu->Advanced (default password: 0000) ->Advanced Network. Select the desired value from the pull-down list of Web Server Type. Press the Save soft key to accept the change. The display device prompts ―Reboot now?‖.
  • Page 145 Configuring Security Features EDH-DSS-DES-CBC-SHA  DES-CBC-SHA  EXP1024-DHE-DSS-RC4-SHA  EXP1024-RC4-SHA  EXP1024-RC4-MD5  EXP-EDH-RSA-DES-CBC-SHA  EXP-EDH-DSS-DES-CBC-SHA  EXP-DES-CBC-SHA  EXP-RC4-MD5  The following figure illustrates the TLS messages exchanged between the system and TLS server to establish an encrypted communication channel: Step1: The system sends ―Client Hello‖...
  • Page 146 *.pem and *.cer. A unique server certificate: It is installed by default and is unique to a system (based on the MAC address) and issued by the Yealink Certificate Authority (CA). A generic server certificate: It is installed by default and is issued by the Yealink Certificate Authority (CA).
  • Page 147 Configuring Security Features Parameter Description Configuration Method Default: Enabled Note: the system If it is enabled, will authenticate the server certificate based on the trusted certificates list. Only when the authentication succeeds, will the system trust the server. If you change this parameter, the system will reboot to implement the changes.
  • Page 148 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method Certificates certificate to the system. Default Certificates  Custom Certificates  Default: Default Certificates Note: If you change this parameter, the system will reboot to implement the changes. Upload the custom device certificate to the system.
  • Page 149 Configuring Security Features Click Confirm to accept the change. A dialog box pops up to prompt that the settings will take effect after a reboot. Click Confirm to reboot the system immediately. To configure TLS for the SIP account via the web user interface: Click on Account->SIP.
  • Page 150 Administrator‘s Guide for Yealink Video Conferencing Systems Click Browse to locate the certificate (*.pem,*.crt, *.cer or *.der) from your local system. Click Upload to upload the certificate. To configure the device certificate via the web user interface: Click on Security->Server Certs.
  • Page 151 Configuring Security Features Click Browse to locate the certificate (*.pem or *.cer) from your local system. Click Upload to upload the certificate. Secure Real-Time Transport Protocol (SRTP) encrypts RTP streams during calls to avoid interception and eavesdropping. To use SRTP encryption for SIP calls, the participants in the call must enable SRTP simultaneously.
  • Page 152 Administrator‘s Guide for Yealink Video Conferencing Systems The callee receives the INVITE message with the RTP encryption algorithm, and then answers the call by responding with a 200 OK message which carries the negotiated RTP encryption algorithm. The following is an example of the RTP encryption algorithm carried in the SDP of the...

  • Page 153: Transport Layer Security

    H.235 is the security recommendation for the H.3xx series systems. In particular, H.235 provides security procedures for H.323-, H.225.0-, H.245- and H.460-based systems. Yealink systems support H.235 for H.323 video conference calls. To use H.235 feature for H.323 calls, the participants in the call must enable the H.235 feature simultaneously.
  • Page 154 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method Disabled—do not use H.235  in H.235 calls. Enabled—negotiate with the  far site whether to use H.235 for media encryption in H.323 calls. Compulsory—compulsory  use H.235 for media encryption in H.323 calls.
  • Page 155 Configuring Security Features Click Confirm to accept the change.
  • Page 156 Administrator‘s Guide for Yealink Video Conferencing Systems...

  • Page 157: System Maintenance

    SNMP  The newly released firmware version may add new features. Because of this, Yealink recommends you to update the firmware regularly. You can upgrade the system firmware via the web user interface. The firmware name of the VC400 video conferencing system is: 30.x.x.x.rom (x is the actual firmware version), the firmware...
  • Page 158 Administrator‘s Guide for Yealink Video Conferencing Systems We may need you to provide the system configurations to the engineer to help analyze problems. You can import configurations to your system to configure your system quickly. The file format of configuration file must be *.bin.
  • Page 159 System Maintenance To reset the system via the web user interface: To reset your phone via the web user interface: Click on Setting->Upgrade. Click Reset to Factory Setting in the Reset to Factory field. The web user interface prompts the message ―Reset your machine?‖. Click Confirm to confirm the resetting.
  • Page 160 SNMP server. The SNMP server may send requests from any available source port to the configured port on the client, while the client responds to the source port on the SNMP server. Yealink systems only support the GET request from the SNMP server.
  • Page 161 System Maintenance Description The target version to which the current version is updated automatically. Format: 1.3.6.1.2.1.37459.2.1. YEALINK-MIB 10.0 MacVersion[*]ComVersion[*] For example, MacVersion[0.0.0.1]ComVersion[0.0.0.1] The command of the system reboot. Format: 1.3.6.1.2.1.37459.2.1. snmpset -v 2c XXXX public 37459.2.1.11.0 YEALINK-MIB 11.0 s reboot XXXX refers to the IP address of the system.
  • Page 162 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method If you change this parameter, the system will reboot to implement the changes. To configure web server type via the web user interface: Click on Network->Advanced. In the SNMP block, select Enabled from the pull-down list of Active.

  • Page 163: Troubleshooting

    Troubleshooting This chapter provides an administrator with general information for troubleshooting some common problems that he (or she) may encounter while using the VC400/VC120 video conferencing system. The system can provide feedback in a variety of forms, such as log files, packets, status indicators and so on, which can help an administrator to find the system problem more easily and resolve it.
  • Page 164 Administrator‘s Guide for Yealink Video Conferencing Systems Parameter Description Configuration Method Default: Local Specify the server address where the log will be exported. Web User Interface Note: It only works if the Server Name parameter ―Export System Log‖ is set to Server.
  • Page 165 Troubleshooting Click Export to open the file download window, and then save the file to your local system. The following figure shows a portion of a log file: To export a log file to a syslog server via the web user interface: Click on Setting->Configuration.
  • Page 166 Administrator‘s Guide for Yealink Video Conferencing Systems user interface or using the Ethernet software. By analyzing the packets captured for troubleshooting purpose. To capture packets via the web user interface: Click on Setting->Configuration. Click Start to start capturing signal traffic.
  • Page 167 Troubleshooting Wrong configurations may have an impact on your system use. You can export configuration file to check the current configuration of the system and troubleshoot if necessary. For more information about how to export system configuration, refer to Importing/Exporting Configuration on page 148.
  • Page 168 Administrator‘s Guide for Yealink Video Conferencing Systems Press to stop audio diagnostics. To diagnose the camera via the remote control: Select Menu->Diagnose menu. Select Camera Diagnose, and then press Press navigation keys to adjust the camera position. Press to adjust the focus.
  • Page 169 This chapter provides general troubleshooting solutions to help you solve the problems you might encounter when using your system. If problems you encounter are not mentioned in this chapter, you can contact your distributor or Yealink FAE. Check whether the display device is connected properly to the VC400/VC120 ...
  • Page 170 Administrator‘s Guide for Yealink Video Conferencing Systems button on the remote control or on the display device. Check whether you have selected the correct video input source. You can try to  switch video input source. If you have configured the system to obtain the time and date from the NTP server ...
  • Page 171 Troubleshooting Check whether the network is available and the LED indicator on the left of the  Internet port illuminates green. Try to use the low speed connection to check whether packets are lost. Deficient  bandwidth is an important reason for packet loss. Check the configuration of the network speed and duplex mode on the system, ...
  • Page 172 Administrator‘s Guide for Yealink Video Conferencing Systems Ensure that the display device has suitable resolution.  Check whether the packet has been lost. For more information about packet loss,  refer to Viewing Call Statistics on page 157. Ensure that camera settings are configured correctly, such as brightness and white ...
  • Page 173 Troubleshooting Check the call statistics to see whether the system is sharing content.  Ensure that dual-stream is configured correctly. For more information, refer to  Dual-Stream Protocol on page 101. When you do one of the following, the system will reboot: Reboot system ...
  • Page 174 Administrator‘s Guide for Yealink Video Conferencing Systems The audio pickup device is moved frequently.  Intermittent voice is probably caused by voice packet loss or jitter. Voice packet  loss may occur due to network congestion. Jitter may occur due to information reorganization of the transmission or receiving equipment, such as, delay processing, retransmission mechanism or buffer overflow.

  • Page 175: Appendix

    Appendix Time Zone Time Zone Name −11:00 Samoa −10:00 United States-Hawaii-Aleutian −10:00 United States-Alaska-Aleutian −09:00 United States-Alaska Time −08:00 Canada(Vancouver, Whitehorse) −08:00 Mexico(Tijuana, Mexicali) −08:00 United States-Pacific Time −07:00 Canada(Edmonton, Calgary) −07:00 Mexico(Mazatlan, Chihuahua) United States-Mountain Time −07:00 −07:00 United States-MST no DST Canada-Manitoba(Winnipeg) −06:00 −06:00...
  • Page 176 Administrator‘s Guide for Yealink Video Conferencing Systems Time Zone Time Zone Name Denmark-Faroe Islands(Torshavn) Ireland(Dublin) Portugal(Lisboa, Porto, Funchal) Spain-Canary Islands(Las Palmas) United Kingdom(London) Morocco +01:00 Albania(Tirane) +01:00 Austria(Vienna) +01:00 Belgium(Brussels) +01:00 Caicos +01:00 Chad +01:00 Croatia(Zagreb) +01:00 Czech Republic(Prague) +01:00...
  • Page 177 New Caledonia(Noumea) +12:00 New Zealand(Wellington, Auckland) +12:45 New Zealand(Chatham Islands) +13:00 Tonga(Nukualofa) Yealink IP phones trust the following CAs by default: DigiCert High Assurance EV Root CA  Deutsche Telekom AG Root CA-2  Equifax Secure Certificate Authority  Equifax Secure eBusiness CA-1 ...
  • Page 178  Note Yealink endeavors to maintain a built-in list of most common used CA Certificates. Due to memory constraints, we cannot ensure a complete set of certificates. If you are using a certificate from a commercial Certificate Authority not in the list above, you can send a request to your local distributor.
  • Page 179 Index Numeric Confiuring Security Features Configuring Packets 802.1x Authentication Camera Issues About This Guide DHCP Auto Answer Do Not Disturb Automatic Sleep Time Dual-Stream Protocol Audio Input Device Dual Screen Audio Output Device Adjusting MTU of Video Packets Analyzing Configuration Files Administrator Password Far Control of Near Camera Appendix A: Time Zones...

  • Page 180: Troubleshooting Solutions

    User Mode User Interfaces Upgrading Firmware Using Diagnostic Methods Packaging Contents Powering the System On and Off Placing a Test Call from the Yealink Video Video Coferencing System Overview Conferencing System VC400/VC120 Codec Preparing the Network VCC18HD Camera VCP40 Video Coferencing Phone...

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