6bf131c7__x____About_Licenses___DocWiki__Description
[License] stdsw [Description] 
The stdsw license enables the system to use the stdvoiceconf, webconf, stdvideoconf, and maxstd licenses for standard (ad hoc) conferencing. (If the systemsoftware license, which denotes that the system is operating in the premium mode, is loaded, the stdsw license is ignored.) The stdsw license has a version number and the system determines if this license is valid based on the version number. Restrictions: You cannot install both the systemsoftware and stdsw licenses on the same server. If you do not install the stdsw license, the system can use only the six trial voice ports, six trial video ports, and six trial web ports for standard (ad hoc) conferencing. The six trial web ports expire 60 days after system installation, unless you install a webconf license to make them permanent.
Cisco Unified MeetingPlace Express, Release 2.x -- About Licenses - DocWiki