System Management243- If the 8 way MCU displays Unsupported, it means you have not imported an 8-wayMCU.- If the 8 way MCU displays X~Y Available, it means you have imported a trail versionof 8-way MCU. So the VC400/VC120 supports up to 8-way video calls and anadditional voice call (an original caller and eight other sites) in X~Y period.- If the 8 way MCU displays Eternal, it means you have imported a permanent versionof the 8-way MCU. So the VC400/VC120 supports up to 8-way video calls and anadditional voice call (an original caller and eight other sites) permanently.NoteVCS Integrated with Control SystemsThe Yealink video conferencing systems provide an API interface for the third-party controlsystem. The API commands can be sent to Yealink video conferencing systems over LAN orUpgrading the system or performing a factory reset will not affect the imported 8-way license.If the system has been imported a trial version of the 8-way license and the license has notexpired, and you import a permanent version to the system, the permanent version will overwritethe trial version.If the system has been imported a permanent version of the 8-way license, and you import a trialversion to the system, the permanent version will not be overwritten.
