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- Field_telephone abstract "Field telephones are mobile telephones intended for military use, designed to withstand wartime conditions. 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.Field telephones replaced flag signals and the telegraph as an efficient means of communication. The first field telephones had a wind-up generator, used to power the telephone's ringer & batteries to send the call, and call the manually operated telephone central. This technology was used from the 1910s to the 1960s. Later the ring signal has been made electronically operated by a pushbutton, or automatic as on domestic telephones. The manual systems are still widely used, and are often compatible with the older equipment.Shortly after the invention of the telephone attempts were made to adapt the technology for military use. Telephones were already being used to support military campaigns in British India and in British colonies in Africa in the late 1870s and early 1880s. In the United States telephone lines connected fortresses with each other and with army headquarters. They were also used for fire control at fixed coastal defence installations. The first telephone for use in the field was developed in the United States in 1889 but it was too expensive for mass production. Subsequent developments in several countries made the field telephone more practicable. The wire material was changed from iron to copper, devices for laying wire in the field were developed and systems with both battery-operated sets for command posts and hand generator sets for use in the field were developed. The first purposely-designed field telephones were used by the British in the Second Boer War. They were used more extensively in the Russo-Japanese War, where all infantry regiments and artillery divisions on both sides were equipped with telephone sets. By the First World War the use of field telephones was widespread.Field telephones operate over wire lines, sometimes commandeering civilian circuits when available, but often using wires strung in combat conditions. At least as of World War II, wire communications were the preferred method for the U.S. Army, with radio use only when needed, e.g. to communicate with mobile units, or until wires could be set up. Field phones could operate point to point or via a switchboard at a command post. A variety of wire types are used, ranging from light weight \"assault wire,\" e.g. W-130 —8.5 kilograms per kilometre (30 pounds per mile)— with a talking range about 8.0 kilometres (5 mi), to heavier cable with multiple pairs. Equipment for laying the wire ranges from reels on backpacks to trucks equipped with plows to bury lines.".
- Field_telephone thumbnail L1010257.jpg?width=300.
- Field_telephone wikiPageExternalLink felttlf.jpg.
- Field_telephone wikiPageExternalLink felttelefon_ny.html.
- Field_telephone wikiPageExternalLink Feldfernsprecher33.htm.
- Field_telephone wikiPageExternalLink od_electronics_ee8.php.
- Field_telephone wikiPageExternalLink od_electronics_ta312.php.
- Field_telephone wikiPageID "7502814".
- Field_telephone wikiPageLength "7229".
- Field_telephone wikiPageOutDegree "26".
- Field_telephone wikiPageRevisionID "659791656".
- Field_telephone wikiPageWikiLink Battery_(electricity).
- Field_telephone wikiPageWikiLink Category:Military_communications.
- Field_telephone wikiPageWikiLink Category:Telephony_equipment.
- Field_telephone wikiPageWikiLink Common_battery.
- Field_telephone wikiPageWikiLink Electric_generator.
- Field_telephone wikiPageWikiLink Elektrisk_Bureau.
- Field_telephone wikiPageWikiLink Flag_signals.
- Field_telephone wikiPageWikiLink Interrogation.
- Field_telephone wikiPageWikiLink Marshall_Plan.
- Field_telephone wikiPageWikiLink Military.
- Field_telephone wikiPageWikiLink Russo-Japanese_War.
- Field_telephone wikiPageWikiLink Second_Boer_War.
- Field_telephone wikiPageWikiLink Sound-powered_telephone.
- Field_telephone wikiPageWikiLink Telegraphy.
- Field_telephone wikiPageWikiLink Telephone.
- Field_telephone wikiPageWikiLink Telephone_exchange.
- Field_telephone wikiPageWikiLink Telephone_line.
- Field_telephone wikiPageWikiLink Telephone_switchboard.
- Field_telephone wikiPageWikiLink Vietnam_War.
- Field_telephone wikiPageWikiLink Vietnam_War_Crimes_Working_Group.
- Field_telephone wikiPageWikiLink War.
- Field_telephone wikiPageWikiLink World_War_I.
- Field_telephone wikiPageWikiLink World_War_II.
- Field_telephone wikiPageWikiLink File:EE8_fiel_telephone_in_use.jpg.
- Field_telephone wikiPageWikiLink File:L1010257.jpg.
- Field_telephone wikiPageWikiLink File:Telephone_linesmen_ford_Lunga_River.jpg.
- Field_telephone wikiPageWikiLinkText "Field telephone".
- Field_telephone wikiPageWikiLinkText "Telephone Systems".
- Field_telephone wikiPageWikiLinkText "field telephone".
- Field_telephone wikiPageUsesTemplate Template:Commons_category.
- Field_telephone wikiPageUsesTemplate Template:Convert.
- Field_telephone wikiPageUsesTemplate Template:Refbegin.
- Field_telephone wikiPageUsesTemplate Template:Refend.
- Field_telephone wikiPageUsesTemplate Template:Reflist.
- Field_telephone subject Category:Military_communications.
- Field_telephone subject Category:Telephony_equipment.
- Field_telephone hypernym Telephones.
- Field_telephone type Communication.
- Field_telephone comment "Field telephones are mobile telephones intended for military use, designed to withstand wartime conditions. 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.Field telephones replaced flag signals and the telegraph as an efficient means of communication.".
- Field_telephone label "Field telephone".
- Field_telephone sameAs Q202821.
- Field_telephone sameAs Feldtelefon.
- Field_telephone sameAs Kampa_telefono.
- Field_telephone sameAs Teléfono_de_campaña.
- Field_telephone sameAs Kenttäpuhelin.
- Field_telephone sameAs Tábori_telefon.
- Field_telephone sameAs Veldtelefoon.
- Field_telephone sameAs Felttelefon.
- Field_telephone sameAs m.0263nr4.
- Field_telephone sameAs Полевой_телефон.
- Field_telephone sameAs Q202821.
- Field_telephone wasDerivedFrom Field_telephone?oldid=659791656.
- Field_telephone depiction L1010257.jpg.
- Field_telephone isPrimaryTopicOf Field_telephone.