язык единой системы обмена сообщениями(One of the languages in which Microsoft Exchange Server 2007 Unified Messaging (UM) functionality is supported by the availability of UM language packs. Rori)
роль сервера единой системы обмена сообщениями(A set of components and services that enable voice, fax, and e-mail messages to be stored in a user's single mailbox. Users can also access their Microsoft Exchange Server 2007 mailbox from a telephone or a computer)