telegraph carrier

См. также в других словарях:

• carrier signaling —    Voice circuits sometimes use a telegraph carrier on one of the voice channels to carry all the associated supervision and signaling circuits; others may use a signaling frequency within the voice band (in band signaling), or in the guard band… …   IT glossary of terms, acronyms and abbreviations

• telegraph company — A company, almost invariably a corporation, engaged in the business of sending communications by telegram and furnishing services allied to such communication business. A company exercising a quasi public employment, chartered for public purposes …   Ballentine's law dictionary

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• Electrical telegraph — A printing electrical telegraph receiver, and a transmitter key at bottom right An electrical telegraph is a telegraph that uses electrical signals, usually conveyed via telecommunication lines or radio. The electromagnetic telegraph is a device… …   Wikipedia