In a short message service (SMS) wireline/wireless message system, a separate SMS exchange subsystem implements value-added service capability. The value addition service may range, for example, from simple data insertion in the SMS message to the more complex initiation of a teleconference call using...http://www.google.com/patents/US20030054844?utm_source=gb-gplus-sharePatent US20030054844 - Method and system for short message service exchange and teleconferencing
