Yealink VC400 Administrator's Manual page 241

license. You can download a 30-day trial from Yealink website.
To import the 8-way conference license via web user interface:
Click on Security ->License.
1.
Click Browse to locate the 8-way conference license (the file format must be *.dat) from
2.
your local system.
Click Upload to complete importing the 8-way conference license.
3.
- If the 8 way MCU displays Unsupported, it means you have not imported an 8-way
conference license.
If the 8 way MCU displays X~Y Available, it means you have imported a trail version
-
of 8-way conference license. So the VC400/VC120 supports up to 8-way video calls
and an additional voice call (an original caller and eight other sites) in X~Y period.
System Management
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