6bf131c7__x____About_Licenses___DocWiki__Description
[License] systemsoftware [Description] 
The systemsoftware license enables the system to use the voiceconf, webconf, and videoconf licenses for premium (scheduled) meetings. If you do not install the systemsoftware license, the system can use only the six trial voice ports, the six trial web ports, and the six trial video ports for premium (scheduled) meetings. The systemsoftware license has a version number and the system determines if this license is valid based on the version number. Note: The six trial web ports expire 60 days after system installation, unless you install a webconf license to make them permanent. Requirements: To obtain a systemsoftware license, purchase a base software SKU or a software version upgrade. You cannot obtain a systemsoftware license by purchasing a capacity or platform upgrade. The version number specified by the systemsoftware license must be greater than or equal to the first digit of the installed software version number. Restriction: You cannot install both the systemsoftware and stdsw licenses on the same server.
Cisco Unified MeetingPlace Express, Release 2.x -- About Licenses - DocWiki