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ANDVT
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<p>The Advanced Narrowband Digital Voice Terminal (ANDVT) is a <a href="/facts/Secure_voice/zGNooDsE">secure voice</a> terminal for low bandwidth secure voice communications throughout the U.S. Department of Defense. Devices in the ANDVT family include the AN/USC-43 Tactical Terminal (TACTERM), the KY-99A Miniaturized Terminal (MINTERM), and the KY-100 Airborne Terminal (AIRTERM). ANDVT uses <a href="/facts/LPC-10/7hcUxhnQ">LPC-10</a> voice compression. </p><p>The functions of the MINTERM are similar to those of the TACTERM; its updated design includes an improved modular architecture, and it has been reduced in size. The MINTERM is lightweight, low-power, single channel, half-duplex, narrowband/wideband/wireline terminal providing secure voice and data communications with full key distribution and remote rekey capabilities. The MINTERM is certified to secure traffic up to TOP SECRET. </p><p>The MINTERM improvements include the following: </p> <ul><li>Concurrent voice and data modes enable the users to connect both data equipment and voice handsets.</li> <li><a href="/facts/VINSON/9QY3nJLd">VINSON</a> (KY-57/58) mode of operation allows interoperability between the MINTERM and the VINSON wideband COMSEC equipment.</li> <li>improved SATCOM performance</li> <li>The latest DOD LPC-10 algorithm (V58) which has been enhanced to provide high-quality secure narrowband voice for military handsets and to maintain that quality and intelligibility in noisy acoustical environments.</li></ul> <p>The AIRTERM is a lightweight, self-contained secure voice and data terminal that provides secure half-duplex voice, digital data, analog data, and remote-keying capabilities for transmission over radio circuits or wireline media. It is a wideband/narrowband terminal that interoperates with the TACTERM, MINTERM, VINSON, and Single Channel Ground and Airborne Radio System (<a href="/facts/SINCGARS/qXoJcGVM">SINCGARS</a>). AIRTERM accepts classified analog voice information and uses LPC-10 at 2.4 kbit/s in narrowband voice modes and continuously variable slope delta (CVSD) modulation at 12 kbit/s and 16 kbit/s in wideband voice modes. The AIRTERM provides the same connectors, with similar functional pinouts, as the VINSON for the wideband operational modes. </p>