ringing relay
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Telephone exchange — A telephone operator manually connecting calls with cord pairs at a telephone switchboard. In the field of telecommunications, a telephone exchange or telephone switch is a system of electronic components that connects telephone calls. A central… … Wikipedia
Number Five Crossbar Switching System — The Number Five Crossbar Switching System or 5XB switch, designed by Bell Labs and made by Western Electric, was in use in Bell System telephone exchanges from 1948 to the 1980s. Its principal use was as a Class 5 telephone switch, though… … Wikipedia
Hearing impairment — See also: Deaf culture for the social movement.. Deaf and/or hard of hearing Classification and external resources The International Symbol for Deafness … Wikipedia
Nottingham University Society of Change Ringers — The Nottingham University Society of Change Ringers is one of the oldest societies affiliated to the University of Nottingham Students Union (where it is known as Bellringing Society), being founded in 1958. Its principal aim is to allow students … Wikipedia
telephone — telephoner, n. /tel euh fohn /, n., v., telephoned, telephoning. n. 1. an apparatus, system, or process for transmission of sound or speech to a distant point, esp. by an electric device. v.t. 2. to speak to or summon (a person) by telephone. 3.… … Universalium
Ringdown — Ringdown: In telephony, a method of signaling an operator in which telephone ringing current is sent over the line to operate a lamp or cause the operation of a self locking relay known as a drop . Ringdown (a) is used in manual operation, as… … Wikipedia
nervous system, human — ▪ anatomy Introduction system that conducts stimuli from sensory receptors to the brain and spinal cord and that conducts impulses back to other parts of the body. As with other higher vertebrates, the human nervous system has two main… … Universalium
Tinnitus — Infobox Disease Name = Tinnitus Caption = DiseasesDB = 27662 ICD10 = ICD10|H|93|1|h|90 ICD9 = ICD9|388.3 ICDO = OMIM = MedlinePlus = 003043 eMedicineSubj = ent eMedicineTopic = 235 MeshID = D014012Tinnitus (pronEng|tɪˈnaɪtəs or IPA|/ˈtɪnɪtəs/,… … Wikipedia
Business and Industry Review — ▪ 1999 Introduction Overview Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… … Universalium
Crossbar switch — In electronics, a crossbar switch (also known as cross point switch, crosspoint switch, or matrix switch) is a switch connecting multiple inputs to multiple outputs in a matrix manner. Originally the term was used literally, for a matrix switch… … Wikipedia
Klonoa: Door to Phantomile — Developer(s) Namco (PlayStation) Paon (Wii) … Wikipedia
