How to fix incorrect time and date on my Yealink VC400 display?
If the display device doesn't show the correct time and date, and the system is set to obtain them automatically from an NTP server, verify that the SNTP server and time zone are correctly configured and that the connection between the system and the NTP server is working. If the time and date are configured manually, ensure they are set correctly.
Why can't I hear the other site clearly during a call on my Yealink VC400?
If you can't hear the other site clearly, ensure that the speaker volume of the far site is not set too low. Muffled audio reception from the far side may be caused by highly reverberant rooms, so speak in close proximity to the phone. Adjust the priority order for your audio codec if you have chosen a low-bandwidth audio codec to be first. For best results, ensure that the caller is using a Yealink video conferencing system. Dust and debris may cause audio quality issues, so use a soft, slightly damp cloth to clean the top surface of the phone if necessary.
Why can't the far site hear the local audio from my Yealink VC400 Conference System?
If the far site can't hear the local audio, ensure that the local audio input device is connected correctly. Check if the near site is muted, and also check whether the system has enabled the auto answer mute or auto dialout mute feature.
Why can’t I view the local video image on my Yealink VC400 Conference System?
If you cannot view the local video image, check whether the local site camera is connected to the VC400/VC120 Codec correctly. Ensure the camera is powered on and the LED indicator is green. Verify that the camera is selected for the current video input source. Check the screen layout to see whether the remote video image is shown in full size.
Why can’t I adjust the remote camera during an active call using my Yealink VC400 Conference System?
To troubleshoot adjusting the remote camera during an active call, first, use the remote control to control the local camera to ensure it functions normally. Then, verify that the far site has enabled the 'Far Control Near Camera' feature. Ensure that you are trying to control the remote camera by selecting 'More->Near/Far Camera' during an active call and selecting the remote video image. Finally, confirm that the far site supports the same call protocol as the local site.
Why can’t I view the menu on my Yealink VC400?
Check whether the Display1 port of VC400/VC120 Codec is connected to the HDMI port on the display device.
Why is the voice quality poor on my Yealink VC400?
Poor voice quality can be due to several factors. Ensure users are not too far from or too close to the microphone, and avoid frequent movement of the audio pickup device. Intermittent voice may be caused by voice packet loss or jitter. Noise from devices like computers or fans can also affect clarity. Try replacing old cables to improve connectivity.
Why can't I hear audio during calls on my Yealink Conference System?
If you can't hear audio during a call, first ensure that the local audio output device is correctly connected. Next, use the audio diagnose feature to check if the audio device is working normally. Also, verify that the ringer volume isn't set to the minimum and that the far site isn't muted.
Why is my Yealink Conference System remote control not working?
If the remote control isn’t working, first ensure the system is powered on. Then, check the battery polarity (+/-) and ensure the battery has sufficient power. Finally, make sure there are no special fluorescent or neon signs nearby that might interfere with the remote's signal.
Why won't my Yealink VC400 call the far site?
If the system fails to call the far site, check the network availability of both the near and far sites. Verify that the far site hasn't enabled the DND (Do Not Disturb) feature. Ensure accounts are correctly registered and the appropriate account is used for the call. Confirm the number you're calling is correct and that the far site isn't rejecting your call. Check if a firewall is blocking inbound traffic, if the far site has reached its call-in limit, if encryption settings are compatible, and if both sites support the same call protocol.
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 |
Guides on installing the VC400 system, mounting the camera, and performing initial setup.
Guides through the initial setup for language, date, time, network, and password.
Covers placing, answering, ending calls, account polling, and call management features.
Performs diagnostics for audio, camera, and network to identify and resolve issues.
Addresses general problems with calls, display, video/audio, and camera, offering solutions.
Procedures for rebooting and resetting the VC400 system to factory defaults.
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