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- Call_sign abstract "In broadcasting and radio communications, a call sign (also known as a call name or call letters—and historically as a call signal—or abbreviated as a call) is a unique designation for a transmitting station. In North America they are used as names for broadcasting stations. A call sign can be formally assigned by a government agency, informally adopted by individuals or organizations, or even cryptographically encoded to disguise a station's identity.The use of call signs as unique identifiers dates to the landline railroad telegraph system. Because there was only one telegraph line linking all railroad stations, there needed to be a way to address each one when sending a telegram. In order to save time, two-letter identifiers were adopted for this purpose. This pattern continued in radiotelegraph operation; radio companies initially assigned two-letter identifiers to coastal stations and stations aboard ships at sea. These were not globally unique, so a one-letter company identifier (for instance, 'M' and two letters as a Marconi Station) was later added. By 1912, the need to quickly identify stations operated by multiple companies in multiple nations required an international standard; an ITU prefix would be used to identify a country, and the rest of the call sign an individual station in that country.".
- Call_sign thumbnail UKTY_Call-sign_of_Russian_nuclear_icebreaker_Arktika.jpg?width=300.
- Call_sign wikiPageExternalLink recap.htm.
- Call_sign wikiPageExternalLink main.html.
- Call_sign wikiPageExternalLink callsign.htm.
- Call_sign wikiPageExternalLink searchLicense.jsp.
- Call_sign wikiPageExternalLink prefixes.htm.
- Call_sign wikiPageExternalLink callsigns.htm.
- Call_sign wikiPageExternalLink aim0402.html.
- Call_sign wikiPageExternalLink gg00073.html.
- Call_sign wikiPageExternalLink www.iruc.org.
- Call_sign wikiPageExternalLink mil_callsigns.html.
- Call_sign wikiPageExternalLink callsign.txt.
- Call_sign wikiPageExternalLink www.primetimeradio.co.nz.
- Call_sign wikiPageExternalLink www.radio-locator.com.
- Call_sign wikiPageID "2797722".
- Call_sign wikiPageRevisionID "602395489".
- Call_sign hasPhotoCollection Call_sign.
- Call_sign subject Category:Amateur_radio_call_signs.
- Call_sign subject Category:Broadcast_law.
- Call_sign subject Category:Call_signs.
- Call_sign subject Category:Telecommunications_law.
- Call_sign type Abstraction100002137.
- Call_sign type AmateurRadioCallSigns.
- Call_sign type CallSigns.
- Call_sign type Clue106643763.
- Call_sign type Communication100033020.
- Call_sign type Evidence106643408.
- Call_sign type Indication106797169.
- Call_sign type Sign106646243.
- Call_sign comment "In broadcasting and radio communications, a call sign (also known as a call name or call letters—and historically as a call signal—or abbreviated as a call) is a unique designation for a transmitting station. In North America they are used as names for broadcasting stations.".
- Call_sign label "Call sign".
- Call_sign label "Indicatif (radio)".
- Call_sign label "Indicativo de chamada".
- Call_sign label "Indicativo di chiamata".
- Call_sign label "Indicativo".
- Call_sign label "Roepletters".
- Call_sign label "Rufzeichen".
- Call_sign label "Znak wywoławczy".
- Call_sign label "Позывной сигнал".
- Call_sign label "رمز نداء (فلك)".
- Call_sign label "无线电台呼号".
- Call_sign label "識別信号".
- Call_sign sameAs Volací_značka.
- Call_sign sameAs Rufzeichen.
- Call_sign sameAs Indicativo.
- Call_sign sameAs Indicatif_(radio).
- Call_sign sameAs Tanda_panggil.
- Call_sign sameAs Indicativo_di_chiamata.
- Call_sign sameAs 識別信号.
- Call_sign sameAs 호출부호.
- Call_sign sameAs Roepletters.
- Call_sign sameAs Znak_wywoławczy.
- Call_sign sameAs Indicativo_de_chamada.
- Call_sign sameAs m.0839zt.
- Call_sign sameAs Q353659.
- Call_sign sameAs Q353659.
- Call_sign sameAs Call_sign.
- Call_sign wasDerivedFrom Call_sign?oldid=602395489.
- Call_sign depiction UKTY_Call-sign_of_Russian_nuclear_icebreaker_Arktika.jpg.
- Call_sign isPrimaryTopicOf Call_sign.