Yealink VC400 Administrator's Guide

Configuring Call Preferences
145
5. (Optional) If Yealink device has audio problems with certain device, select Enabled from
the pull-down list of Special audio codec byte sequence.
6. Click Confirm to accept the change.
Video Codecs
The video codec that the system uses to establish a call should be supported by the server.
When placing a call, the system will offer the enabled video codec list to the server and then use
the video codec negotiated with the called party according to the priority.
The following table summarizes the supported video codecs on the system:
Name
MIME Type
Bit Rate
Frame Rate
Frame Size
H.264 High
Profile
H264/90000
90 kbps to
2048 kbps
5 fps to
30 fps
Tx: WQVGA,360P, 448P,
540P, 720P, 1080P
Rx: Conventional Size
Below 1080P
H.264
H264/90000
H.263
H263/90000
Tx: CIF, 4CIF
RX: QCIF, CIF, 4CIF

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