Abstract: A system and method for context-assisted information retrieval include a communication device, such as a wireless personal communication device, for transmitting screen-context information and voice data associated with a user request to a voice information retrieval server. The voice information retrieval server utilizes the screen-context information to define a grammar set to be used for speech recognition processing of the voice frames; processes the voice frames using the grammar set to identify response information requested by the user; and convert the response information into response voice data and response control data. The server transmits the response voice data and the response control data to the communication device, which generates an audible output using the response voice data and also generates display data using the response control data for display on the communication device.

Abstract: Systems and methods for enabling a PTT user to communicate with an FDV user on a personal PTT communication appliance are provided. The PTT user communicates with the FDV user by connecting to a PTT to FDV system associated with a PTT network and a FDV network. The PTT to FDV system allows users on both PTT and full-duplex networks to communicate rapidly, efficiently, without requiring change in user behavior, without unnecessary speech cutoff, and without requiring technology modifications on either network.