STU-III (Secure Telephone Unit - third generation) is a family of secure telephones introduced in 1987 by the NSA for use by the United States government, its contractors, and its allies.

The Sturmgeschütz III (StuG III) was an assault gun produced by Nazi Germany during World War II. It was the most-produced German fully tracked armoured fighting vehicle, [4] and second-most produced German armored combat vehicle of any type after the Sd.Kfz. 251 half-track.

STU-III is the last of a series of digital Secure Telephone Units (STU), developed in 1987 by the US National Security Agency (NSA) 1 for secure voice communication over non-secure analogue PSTN telephone networks (POTS).

We developed this handbook to assist Facility Security Officers (FSOs) of cleared defense contractors who require the STU-III, Type 1 unit. It covers step-by-step what you need to know and do to make the STU-III a valuable addition to your facility's operations.

The STU-III is an unclassified, Government-approved telephone that can secure communications on commercial, Automatic Voice Network, or foreign telephone networks. As of July 1988,...

Secure Telephone Unit · STU-III · Type 1 The 1100 was a third generation Secure Telephone Unit (STU-III), developed in the US by the National Security Agency (NSA) around 1987 and introduced by AT&T (later: Lucent) in 1992.

STU-III/R is a 3rd generation secure voice and data terminal with remote control interface (RCI), developed around 1991 by Motorola in Seguin (Texas, USA). The device is compatible with STU-III and STU-II (KY-71) terminals and uses a KSD-64A as the Crypto Ignition Key (CIK).

In general, STU-III (Secure Telephone Unit Third Generation) is the standard telephone used by governments at all levels for secure communications. It is manufactured by various companies such as Motorola and AT&T, and is unique in that although it plugs into a normal telephone jack, the unit itself requires a security controlled key to access ...

The STU-III Type 1 terminal is a dual-purpose telephone capable of providing secure and nonsecure voice and data capabilities. Use the Type 1 terminal as an ordinary telephone.

Definition of STU-III in Military and Government. What does STU-III stand for?