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Yealink VC400 Administrator's Guide

Yealink VC400
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Administrator’s Guide for Yealink Video Conferencing Systems
170
To specify the language for the web user interface via web user interface:
1. Click Language at the top of the web page.
2. Select the desired language from the pull-down list of Language.
To specify the language for the display device and the video conferencing phone via the
remote control:
1. Select Menu->Basic.
2. Select the desired language from the pull-down list of Language.
3. Press the Save soft key to accept the change.
Date & Time
Time and date are displayed on the idle screen of the display device and the video conferencing
phone. Time and date are synced automatically from the NTP server by default. The default NTP
server is cn.pool.ntp.org. The NTP server is configurable manually or obtained by DHCP via
DHCP Option 42. The phone will use the NTP server obtained by DHCP preferentially. If the
system cannot obtain the time and date from the NTP server, you need to manually configure
them. The time and date can use one of several different formats.
Time Zone
A time zone is a region on Earth that has a uniform standard time. It is convenient for areas in
close commercial or other communication to keep the same time. When configuring the system
to obtain the time and date from the NTP server, you must set the time zone.
Daylight Saving Time
Daylight Saving Time (DST) is the practice of temporary advancing clocks during the
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

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Yealink VC400 Specifications

General IconGeneral
Optical zoom18 x
White balanceAuto, Indoor, Outdoor
Focus adjustmentAuto
Video codecsH.264, H.264, H.263
Supported video modes1080p
Supported graphics resolutions352 x 288, 704 x 576, 1280 x 720 (HD 720), 1920 x 1080 (HD 1080)
Voice codecsG.711, G.711a, G.722
Line-inYes
USB 2.0 ports quantityUSB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
ITU-supported standardsH.323
Ethernet LAN data rates10, 100, 1000 Mbit/s
AC input voltage100-240 V
Power consumption (max)30 W
Weight and Dimensions IconWeight and Dimensions
Depth183 mm
Width330 mm
Height40 mm

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