Abstract : The long-range objectives of the Packet Speech Systems Technology Program are to develop and demonstrate techniques for efficient digital speech communication on networks suitable for both voice and data, and to investigate and develop techniques for integrated voice and data communication in packetized networks, including wideband common-user satellite links. Specific areas of concern are: the concentration of statistically fluctuating volumes of voice traffic, the adaptation of communication strategies to varying conditions of network links and traffic volume, and the interconnection of wideband satellite networks to terrestrial systems. The current program has two major thrusts: i.e. , the development and refinement of practical low-cost, robust, narrowband, and variable-rate speech algorithms and voice terminal structures; and the establishment of an experimental wideband satellite network to serve as a unique facility for the realistic investigation of voice/data networking strategies. This report covers work in the following areas: digital channel vocoder development; embedded CVSD-based speech waveform encoder design and implementation; development and experimental tests of modular packet voice terminals (PVTs) and local access area (LEXNET) facilities; development of a miniconcentrator facility to mediate the flow of traffic from the LEXNET onto the wideband satellite network, and execution of packet speech experiments using this facility; and definition and planning of, and participation in, experiments on the wideband integrated voice/data network.