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Field telephones are telephones used for military communications. They can draw power from their own battery, from a telephone exchange (via a central battery known as CB), or from an external power source. Some need no battery, being sound-powered telephones . Telephone linesmen ford Lunga River during the Guadalcanal Campaign of World War II.
Autovon. The Automatic Voice Network ( AUTOVON, military designation 490-L) [1] was a worldwide American military telephone system. The system was built starting in 1963, based on the Army's existing Switch Communications Automated Network (SCAN) system. In June 1966, the Air Defense Command voice network was cut over to the new service. [2]
Military communications – or "comms" – are activities, equipment, techniques, and tactics used by the military in some of the most hostile areas of the earth and in challenging environments such as battlefields, on land (compare radio in a box ), underwater and also in air. Military comms include command, control and communications and ...
A military service number of the Regular Army. Service numbers were used by the United States Army from 1918 until 1969. Prior to this time, the Army relied on muster rolls as a means of indexing enlisted service members while officers were usually listed on yearly rolls maintained by the United States War Department. In the nineteenth century ...
Old Receiver schematic, c.1906 A German rotary dial telephone, the W48 Top of cellular telephone tower. By 1904, over three million phones in the U.S. were connected by manual switchboard exchanges. By 1914, the U.S. was the world leader in telephone density and had more than twice the teledensity of Sweden, New Zealand, Switzerland, and Norway.
The entire range of United States service numbers extends from 1 to 99,999,999 with the United States Army and Air Force the only services to use numbers higher than ten million. A special range of numbers from one to seven thousand (1–7000) was also used by the United States Air Force Academy for assignment only to cadets and was not ...
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