STU-III System Level Description and Network Applications. Revision
Abstract:
This paper serves as the system level description of the Secure Technical Unite Type III STU-III and its interfaces in a variety of DoD switched voice network applications. The STU-III terminal is being developed by the National Security Agency and is intended to replace several thousand existing analog clear voice telephone instruments in the DoD. Its operation and interface to the switched networks is essentially the same as for existing or planned clear voice telephones. The STU-III family of terminals includes two types of Low Cost Terminals LCT-1 and LCT-2, and STU-II compatible terminal STU-IIIA and a ruggedized mobileportable terminal STU-IIIMPT. The LCT-1 is intended to be the primary DoD secure voice terminal, whereas the STU-IIIA and STU-IIIMPT will be used for special applications, e.g., for interoperability with the NATO STU-II terminals and tactical operations requirements.