off-hook signal

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• Off-hook tone — The off hook tone (also receiver off hook tone or off hook warning) is a telephony signal used to alert a user that the telephone has been left off hook for an extended period, effectively disabling the telephone line. See permanent signal.… …   Wikipedia

• Off-hook — In telephony, the term off hook has the following meanings: The condition that exists when a telephone or other user instrument is in use, i.e., during dialing or communicating. Note: off hook originally referred to the condition that prevailed… …   Wikipedia

• Hook flash — (sometimes labeled flash ) is a button on a telephone that simulates quickly hanging up then picking up again (a quick off hook/on hook/off hook cycle). This action can signal the telephone exchange to do something. A common use of hook flash is… …   Wikipedia

• connect signal —    An off hook signal transmitted forward which indicates a trunk seizure …   IT glossary of terms, acronyms and abbreviations

• Permanent signal — (PS) in US telephony jargon, or Permanent Loop in British usage, is a condition in which a POTS line is off hook without connection for an extended period of time. This is indicated in modern switches by the silent termination after the off hook… …   Wikipedia

• Telephone hook — A telephone hook or switchhook is the cradle where a telephone handset resides. It takes its name from old wooden wall telephones, where the mouthpiece was usually mounted on the telephone box and the receiver was separate, on a cable. When the… …   Wikipedia

• Busy signal — For other uses, see Busy signal (disambiguation). A busy signal (or busy tone or engaged tone) in telephony is an audible or visual signal to the calling party that indicates failure to complete the requested connection of that particular… …   Wikipedia

• Landing Signal Officer — Landing Signal Officers (LSOs) are naval aviators specially trained to control the approach and landings of airplanes aboard aircraft carriers. Paddles In the U.S. Navy, aircraft carrier operations began with USS Langley (CV 1) in 1922. Langley s …   Wikipedia

• Boot hook — Boot Boot, n. [OE. bote, OF. bote, F. botte, LL. botta; of uncertain origin.] 1. A covering for the foot and lower part of the leg, ordinarily made of leather. [1913 Webster] 2. An instrument of torture for the leg, formerly used to extort… …   The Collaborative International Dictionary of English

• Direct distance dialing — (DDD) or direct dial is a telecommunications term for a network provided service feature in which a call originator may, without operator assistance, call any other user outside the local calling area. DDD requires more digits in the number… …   Wikipedia

• OH — ● ►en sg. m. ►SIGN►COMM Off Hook. signal indiquant qu un modem est prêt à recevoir un appel …   Dictionnaire d'informatique francophone