Der Tonruf wird im Amateurfunk verwendet, um Relaisstationen zu aktivieren. Dabei wird ein Ton mit einer Frequenz von 1750 Hz übermittelt. Der Tonruf dient der Vorbeugung gegen unerwünschte Aktivierung eines Relais durch Störungen.
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Tone — may refer to: MusicTheory* Pitch (music), the perceived frequency of a note or sound (see also pure tone) * Note, the name of a pitch * Whole tone, or major second, a commonly occurring musical interval * Timbre, the quality of a musical note or… … Wikipedia
call — [kôl] vt. [ME callen < Late OE ceallian & or < ON kalla < IE base * gal , to scream, shriek > Brythonic galw, call, Ger klage & (?) MIr gall, swan] 1. to say or read in a loud tone; shout; announce [to call the names of stations] 2.… … English World dictionary
Call forwarding — (or call diverting), in telephony, is a feature on some telephone networks that allows an incoming call to a called party, which would be otherwise unavailable, to be redirected to a mobile telephone or other telephone number where the desired… … Wikipedia
Call waiting — (or catch phone in Japan), in telephony, is a feature on some telephone networks. If a calling party places a call to a called party which is otherwise engaged, and the called party has the call waiting feature enabled, the called party is able… … Wikipedia
Call My Name — Pietro Lombardi Veröffentlichung 7. Mai 2011 Länge 3:42 Genre(s) Pop Autor(en) Dieter Bohlen … Deutsch Wikipedia
call waiting — call′ wait′ing n. tgp a telephone service whereby a person engaged in a phone call is notified by a tone that a second call is being made to the same number • Etymology: 1990–95 … From formal English to slang
Call-progress tone — In telephony, call progress tones are audible tones sent from the PSTN or a PBX to calling parties to indicate the status of phone calls. Equipment such as fax machines and modems are designed to recognise dial tones and busy tones.The ITU T… … Wikipedia
Tone cluster — Example of piano tone clusters. The clusters in the upper staff C♯ D♯ F♯ G♯ are four successive black keys … Wikipedia
Call centre — A very large collections call centre in Lakeland, Florida. A call centre or call center is a centralised office used for the purpose of receiving and transmitting a large volume of requests by telephone. A call centre is operated by a company to… … Wikipedia
tone — tone1 W2 [təun US toun] n ▬▬▬▬▬▬▬ 1¦(voice)¦ 2¦(sound)¦ 3¦(general feeling/attitude)¦ 4¦(colour)¦ 5¦(electronic sound)¦ 6 raise/lower the tone (of something) 7¦(body)¦ 8¦(music)¦ 9¦(voice level)¦ ▬▬▬▬▬▬▬ [Date … Dictionary of contemporary English
