Yealink VC400 Administrator's Guide

Administrator’s Guide for Yealink Video Conferencing Systems
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2. Select the desired value from the pull-down list of Audio Input.
3. Click Confirm to accept the change.
To configure the audio input device via the remote control:
1. Select Menu->Video & Audio->Audio Settings.
2. Select the desired value from the pull-down list of Audio Input.
3. Press the Save soft key to accept the change.
Adjusting MTU of Video Packets
Video packets that exceed the maximum transmission unit (MTU) size for any router or segment
along the network path may be fragmented or dropped. This results in poor quality video at the
receiving device. You can set the maximum MTU size of the video packets sent by the system.
The default value is 1500 bytes. Specify the MTU size used in calls based on the network
bandwidth settings. If the video becomes blocky or network errors occur, packets may be too
large; decrease the MTU. If the network is burdened with unnecessary overhead; packets may be
too small, increase the MTU.
The MTU parameter on the system is described below.
Parameter
Description
Configuration Method
Video MTU
Specifies the maximum MTU size (in
bytes) of video packets sent by the
system.
Valid Values: Integer from 1000 to
Remote Control
Web User Interface

Yealink VC400 Specifications

General

Optical zoom	18 x
White balance	Auto, Indoor, Outdoor
Focus adjustment	Auto
Video codecs	H.264, H.264, H.263
Supported video modes	1080p
Supported graphics resolutions	352 x 288, 704 x 576, 1280 x 720 (HD 720), 1920 x 1080 (HD 1080)
Voice codecs	G.711, G.711a, G.722
Line-in	Yes
USB 2.0 ports quantity	USB 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 standards	H.323
Ethernet LAN data rates	10, 100, 1000 Mbit/s
AC input voltage	100-240 V
Power consumption (max)	30 W

Weight and Dimensions

Depth	183 mm
Width	330 mm
Height	40 mm