ringdown
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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
Ringdown SSSI, Somerset — Infobox SSSI name=Ringdown aos=Somerset interest=Biological gridref=gbmappingsmall|ST178155 area=4.0 hectare (9.9 acre) notifydate=1990 http://www.natureonthemap.org.uk/map.aspx? ] Ringdown (gbmapping|ST178155) is a 4.0 hectare (9.9 acre)… … Wikipedia
ringdown — Signaling used in manual systems where picking up one phone automatically rings another. The telephone s ringing gains an operator s attention, and initiates a current that is sent over the line to engage a lamp and drop a self locking relay … IT glossary of terms, acronyms and abbreviations
Glossary of firefighting equipment — Note: This list is incomplete. You can help Wikipedia by [http://en.wikipedia.org/w/index.php?title=Glossary of firefighting equipment action=edit adding to it] . 0 9 * 1 3/4 inch hose: see attack hose * 2 1/2 inch hose: see attack hose , supply… … Wikipedia
Rotary dial — A German Fe TAp 615, (R g) a widespread rotary dial telephone of the 1960s to the 1980s The rotary dial is a device mounted on or in a telephone or switchboard that is designed to send electrical pulses, known as pulse dialing, corresponding to… … Wikipedia
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
Cavity ring-down spectroscopy — (CRDS) is a spectroscopic technique for measuring the transmission or more accurately, the absorbance of light through a material. CRDS can provide extremely sensitive measurements, allowing scientists to measure very small differences in the… … Wikipedia
Churchstanton — Coordinates: 50°55′27″N 3°08′48″W / 50.9243°N 3.1467°W / 50.9243; 3.1467 … Wikipedia
PLAR — Prior Learning Assessment And Recognition (Community » Educational) * Private Line Automatic Ringdown (Computing » Telecom) * Private Line Auto Ringdown (Computing » Telecom) * Prior Learning And Recognition (Academic & Science » Universities) … Abbreviations dictionary
RD — receive data; ringdown … Military dictionary
