Enterprise mobile network for providing cellular wireless service using licensed radio frequency spectrum and the session initiation protocol

摘要

Support for Session Initiation Protocol (SIP) devices is provided in an enterprise mobile network that provides wireless service within a coverage area associated with an enterprise using licensed radio frequency spectrum. In various embodiments, support SIP devices is provided by, for example, incorporating SIP user agent in a mobile switching subsystem or in a base station subsystem or by incorporating SIP server functionality into a mobile switching subsystem.