Abstract: A remote speaker and handset unit is interfaced with a satellite communicons system and a number of common users. A vocoder is interposed between each unit and the communications system to enable a real-time voice modulation-demodulation with suitable encryption. Means are provided for permitting a user to listen over a loudspeaker and to interrupt the loudspeaker with the handset when it is desired to transmit a transmission.

Abstract: A system interfaces classified information for encryption and transmission over ultra high frequency (uhf) or high frequency (hf) bands and for receiving and decryption of uhf and hf information for relay to a tactical data unit or a vocoder unit. The uhf link is relayed by satellite while the hf link follows a more conventional path to provide for backup in case one link or the other somehow is disabled. Optionally, a uhf submarine-satellite information exchange capability system (SSIXS) is included when the rest of the system is not utilized.