6bf131c7__x____About_Licenses___DocWiki__Description
[License] stdvoiceupg [Description] 
The stdvoiceupg license allows you to upgrade standard (ad hoc) voice licenses to premium (scheduled) voice licenses when upgrading Cisco Unified MeetingPlace Express VT to Cisco Unified MeetingPlace Express. The stdvoiceupg license essentially changes the stdvoiceconf license into a voiceconf license.
Cisco Unified MeetingPlace Express, Release 2.x -- About Licenses - DocWiki