
	Where results make sense

Topic: Strowger switch

Related Topics

Almon Strowger

Automatic telephone exchange

Telephone operator

Dial

Telephone exchange

Crossbar

Rotary dial

SS7

Bell Labs

DTMF

Essex County, Vermont

Linden, Wisconsin

Amateur radio

Flat Earth Records

Space station (Star Trek)

In the News (Tue 24 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	The Early Years of the Strowger System by R.B. Hill
		Strowger is said to have constructed the first crude model of his switch from a cardboard collar box and a paper of pins.
		Switches of this type, which were covered by patent No. 540,168, were installed at La Porte, Ind., in the fall of 1894 to replace the original equipment, and at Michigan City, Ind, in the same year.
		Early in 1908, the first Strowger straight two-wire system, in which the ground was eliminated, was installed at Pontiac, Ill. This was accomplished by the use of a sluggish, or slow-release, relay which, when energized by a current, held its contacts closed for a short period after the circuit through its winding had been broken.
	www.privateline.com /Switching/EarlyYears.html (3562 words)

	Strowger switch
		Switching devices can also be positioned in the vertical direction as well as horizontal direction, also increasing the switching capacity.
		Strowger was a man of some wealth at his death and was reported as owning at least a city block of property.
		Strowger was admitted to the hall of fame of the U.S. Independent Telephone Association in 1965.
	www.brainyencyclopedia.com /encyclopedia/s/st/strowger_switch.html (1327 words)

	Station Information - Telephone exchange
		On March 10, 1891, Almon Strowger, an udertaker in Topeka Kansas, patented the strowger switch, a device which lead to the automation of the telephone circuit switching.
		Because the switches were hard-wired together and fairly hard to re-wire (re-grade), telephone exchange buildings in many larger cities were dedicated to circuits that began with the first two or three numbers of the (in North America) standard 7 digit phone numbers.
		Telephone switches are usually owned and operated by a telephone service provider or "carrier" and located in their premises, but sometimes individual businesses or private commercial buildings will house their own switch (which may well be owned and operated by a telephone service provider still).
	stationinformation.com /encyclopedia/t/te/telephone_exchange.html (2323 words)

	Crossbar switch Information - mechanical crossbar switch
		Crossbar switches have a characteristic matrix of switches between the inputs to the switch and the output of the switch.
		They were mechanical crossbar switch first widely installed in the 1950s in both the United States and England, and from there quickly spread crossbar mechanical switch to the rest of the world.
		One method used the switches as functional replacement for Strowger switches, and the control was distributed to the switches themselves.
	www.inanot.com /Ina-Electronics_Topics_Co_-_Cz-/Crossbar_switch.html (1144 words)

	Almon Brown Strowger - Wikipedia, the free encyclopedia
		Strowger sold his patents in 1896 for $1,800 and sold his share in the Automatic Electric Company for $10,000 in 1898.
		Strowger was a man of some wealth at his death and was reported as owning at least a city block of property.
		Strowger as a farmer in Ohio in 1870
	en.wikipedia.org /wiki/Strowger_switch (1239 words)

	[No title]
		On March 10, 1891, Almon Strowger, an undertaker in Topeka, Kansas, patented the Strowger switch, a device which led to the automation of the telephone circuit switching.
		These step switches were arranged in banks, beginning with a "line-finder" which detected that one of up to a hundred subscriber lines had the receiver lifted "off hook".
		Telephone switches are usually owned and operated by a telephone service provider or "carrier" and located in their premises, but sometimes individual businesses or private commercial buildings will house their own switch, called a PBX, or Private Branch Exchange.
	www.algebra.com /~pavlovd/wiki/Telephone_exchange (3458 words)

	Strowger Inc :: Manufactures Representatives - About Us
		Strowger filed his patent application on March 12, 1889, and it was issued on March 10,1891 as patent No. 447,918.
		Strowger's company was eventually consumed by the giants of the telecommunications industry; having been owned at one time or another by ATandT, Verizon/GTE and Lucent.
		The oldest still operating Strowger mechanical switch is at a traditional summer boys camp in the mountains of northeastern Pennsylvania.
	www.strowger.com /about_us.php (648 words)

	Information about Central office
		On March 10, 1891, Almon Strowger, an undertaker in Kansas City, MO patented the stepping switch, a device which led to the automation of the telephone circuit switching.
		Later step switches were arranged in banks, beginning with a line-finder which detected that one of up to a hundred subscriber lines had the receiver lifted "off hook".
		The structure of a switch is an odd number of layers of smaller, simpler subswitches.
	english.turkcebilgi.com /Central_office (5537 words)

	Stepping switch - Suprari (beta)
		In electrical controls, a stepping switch (also called a uniselector), is an electromechanical device which allows an input connection to be connected to one of a number of possible output connections, under the control of a series of electrical pulses.
		Some stepping switches would rotate continuously back to the "home" position as soon as they reached the last position, while others had a separate "reset" coil and a return spring, and still others would rotate forward rather than back, to the home position.
		These were driven by the electrical pulses (opens) generated from a telephone dial: On a selector switch, as each digit was dialled, the wiper would step up the banks, then rotate automatically until the wiper found an "unused" set of contacts to the next switch.
	www.suprari.com /wiki.php?page=Stepping_switch (755 words)

	Home > Riverside, California, CA, 92501, Riverside Real Estate, Riverside Yellow Pages, Riverside Classifieds, ... (Site not responding. Last check: )
		On March 10, 1891, Almon Strowger, an undertaker in Topeka, Kansas, patented the Strowger switch, a device which led to the automation of the telephone circuit switching.
		Switching, transmission and billing equipment may be slaved to very high accuracy 10 MHz standards which synchronize time events to very close intervals.
		The structure of a switch is an odd number of layers of smaller, simpler subswitches.
	www.riversidecaus.com /section/Telephone_switch (5184 words)

	TelecomPie.com
		To test the basic functioning of all of the switches in a chain, a special "test" number was reserved that consisted of all 5s (555–5555) — half-way up and in on each bank.
		All switches built since the 1980s are digital, so for practical purposes this is a distinction without a difference.
		Telephone switches are usually owned and operated by a telephone service provider or "carrier" and located in their premises, but sometimes individual businesses or private commercial buildings will house their own switch, called a PBX, or Private Branch Exchange.
	www.telecompie.com /telephone/exchange.html (2996 words)

	Crossbar switch
		A crossbar switch is an electromechanical device for switching telephone calls.
		They were first widely installed in the 1950s in both the United States and England, and from there quickly spread to the rest of the world.
		They replaced most earlier designs like the Strowger switch in larger installations.
	www.ebroadcast.com.au /lookup/encyclopedia/cr/Crossbar_switch.html (267 words)

	[No title]
		Strowger's invention was a ten-position rotary selector switch with a pivot- ing central arm that could rotate to connect with any of ten electrical con- tacts.
		A Strowger switch must determine on the basis of the first digit dialed whether to set up a local call or to select a trunk line for a call to another ex- change.
		Modern switches are fully electronic rather than electromechanical, and they are capable of holding a series of digits in a buffer before determin- ing what to do with them.
	www.textfiles.com /phreak/NUMBERS/number_c.1 (4604 words)

	Missed call spurs idea 02/22/04 (Site not responding. Last check: )
		Strowger believed the local telephone operator who ran "central" was in collusion with his competition.
		Strowger arrived in Chicago with his idea of an automatic dialing system modeled from a cardboard collar box, a paper of pins and a lead pencil.
		At LaPorte, Strowger responded to the press's thinly veiled hints that he was out to replace telephone operators by saying, "I am often told that the telephone girls will be angry to me for robbing them of their occupations.
	www.cjonline.com /stories/022204/ses_directdial.shtml (1751 words)

	Why Net Neutrality Matters
		Strowger was so incensed he invented the amazing eponymous Strowger switch that allowed people to make connections themselves through the use of a rotary dial.
		These switches were in place for many years, and visitors to central offices could hear the clicking of the switches as calls were automatically routed from the caller to the recipient.
		Strowger's invention is no longer used (although I wouldn't be surprised to be proven wrong on this assertion), as most calls are now digitally routed to their destination, but the central advantage stays the same.
	www.districtadministration.com /pulse/commentpost.aspx?news=no&postid=17625 (602 words)

	Definition of Strowger switch
		Strowger was a man of some wealth at his death and was reported as owning at least a city block of property.
		Strowger sold his patents in 1896 for $1,800 and sold his share in the Automatic Electric Company for $10,000 in 1898.
		Strowger was admitted to the hall of fame of the U.S. Independent Telephone Association in 1965.
	www.wordiq.com /definition/Strowger_switch (1212 words)

	Switches, Switchboards, and Central Offices
		Unlike a switch that allows a person to turn on and off a bedroom light, a telephone switch or switching system is rather complex in that it has to do more than just connect two wires together.
		Strowger was an undertaker in Kansas City and in 1891, irritated beyond endurance because he thought he was being given wrong numbers by central office operators, he decided to take the matter in hand and do something about it.
		Strowger moved into telephony from the undertaking business because, as the near-legend has it, he was convinced that some local telephone operators, their power over him having cone to their heads, were deliberately giving wrong numbers and busy signal reports to his customers in order to drive him out of business.
	www.telephonetribute.com /switches.html (3149 words)

	Fluid Networking
		Although MPLS uses switching technologies for normal transport, it requires the use of IP routing technologies for path setup.
		Switches can be connected together in tandem, as the number of nodes and network complexity is virtually unlimited.
		Switching hardware is very dense and very fast: A 16-port 10G switch only occupies 1 U. Plug and Play
	www.fluidnetworking.net (508 words)

	The History of the Telephone on Prince Edward Island
		This page is intended to be an ongoing log of the status of the Strowger switching demonstration unit being built as a display unit for the Telephone Museum of Prince Edward Island.
		Aquisition of parts to construct a Strowger Step-by-step demonstration switch is proceeding, and a relay rack unit shown to the left has been purchased to mount the demo in.
		I could have done without this switch, but it was worth its weight in gold for what I learned from it about servicing switches, and though the demo would have been a very effective exchange without it, it merely increases its capabilities.
	www.islandregister.com /phones/demo.html (5956 words)

	Privateline.com Telephone History: Page 5: 1892 to 1913
		Almon Brown Strowger (pronounced STRO-jer) was born in 1839 in Penfield, New York, a close suburb of Rochester.
		Strowger contended that an operator at the new telephone exchange had intentionally directed the call to a competitor -- an allegation that gave rise to tales that the operator was either married to, or the daughter of, a competing undertaker."
		Yet he described the switch in sufficient detail and with enough novel points for it to be granted Patent number 447,918, on March 10, 1891.
	www.privateline.com /TelephoneHistory2/HistoryA2.html (2168 words)

	What's a network provider to do? Revenues from switched voice are still falling. Is broadband the answer to ...
		When Almon B. Strowger patented his automatic telephone switch in Kansas City, Missouri, in 1891, he--arguably--gave both operators and customers a great deal more power.
		It could be said that the introduction of IP is a similar step-change, except this time the operator may not have been handed something wholly positive.
		Strowger's switch removed the manual operator and made expansion simpler.
	findarticles.com /p/articles/mi_m0IUL/is_11_38/ai_n15379475 (896 words)

	THG-Strowger
		Strowger is an electromechanical telephone switching system, known by the name Strowger in Britain and some English-speaking territories, and as 'step' or Step-by-Step (SxS) in North America.
		Almon Brown Strowger is the man credited with inventing this system in the late 19th century.
		Strowger is heavy; most telephone exchanges had specially reinforced floors to carry the fantastic load of rack upon rack crammed with relays sets and selectors fitted in wherever space allowed.
	www.thg.org.uk /strowger/index.htm (474 words)

	Previous Switchers' Quarterly Highlights
		This unique switch was developed to provide a cost effective way of expanding existing central offices in the 1980's.
		During a cutover of a No. 5 crossbar switch one worker said, "It was a sickening feeling you couldn't go back" as he cut the cables in the old manual office.
		With 22 relays, a minor switch plus a repeat coil, it does just about everything a switch could do.
	www.telephonecollectors.org /switcher/2004/2004.htm (811 words)

	Telephone Exchange: Cities
		In 1889, Almon B. Strowger a Kansas City undertaker, invented a switch that could connect one line to any of 100lines by using relays and sliders.
		This switchbecame known as "The Strowger Switch" and was still in use in some telephone offices well over 100 years later.
		Almon Strowger was issued a patent on March 11, 1891 for the first automatic telephone exchange.
	www.lycos.com /info/telephone-exchange--cities.html (512 words)

	Definition: Telephone Exchange: Telecom Dictionary - Phone Service Definitions
		All switches built since the 1970s are digital, so for practical purposes this is a distinction without a difference.
		The structure of a switch is an odd number of layers of smaller, simpler subswitches, interconnected by a web of wires that goes from each subswitch, to a set of the next layer of subswitches.
		Another way is to have a minimal switching fabric that still can theoretically make all the connections, and reorganize the switch's connections when a new connection won't fit.
	www.higginsinternational.com /Definitions/Telephone_Exchange_dictionary.htm (3766 words)

	Welcome to the Camp Shohola Communications & Technology Center.
		The telephone system is a fully operational Automatic Electric/Strowger telephone switching system invented by Almon B. Strowger, using technology developed in the late 1890's and early 1900's.
		The switch on the floor was constructed in 1978 by Rick Walsh using similar components and won a first place prize at the Antique Telephone Collectors Convention in Hartford, Connecticut in 1980.
		The single connector switch on the shelf is an original Strowger switch manufactured in 1909 shortly after Joseph Harris licensed the technology and merged the companies.
	www.shohola.com /kd3fg/CommTech_files (1082 words)

	Intelligent Networks
		The digital switching and transmission equipment that telecoms operators have installed is made up of specialized computers designed to perform highly specific functions.
		When the call is terminated the local switch signals the time spent on the line to the billing system - and that, in a standard telephone call, is about all there is to it.
		Of course it would be possible to use the existing switches and multiplexers to run the distributed IN - they are already powerful computers in their own right, and they tend to be very reliable.
	www.itu.int /TELECOM/wt95/pressdocs/ft-03-e.html (2548 words)

	NeTReL
		This started when Almon B. Strowger, an undertaker in Kansas City, was suspecting that a competing undertaker's wife, who worked as an operator at the local telephone company's manual switch, was directing business to her husband!
		He developed a model for automatic switching for which he was awarded a patent in 1891 (US Patent No. 447918, awarded on 10/6/1891), and he started the company 'Strowger Automatic Telephone Exchange' in the same year.
		Strowger switch is no doubt one of the greatest innovations in the world of networking/telecommunications, and Strowger can be considered the father of automatic switching.
	conrel.sice.umkc.edu (416 words)

Try your search on: Qwika (all wikis)