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Topic: Telephone line



  
 telephone - Columbia Encyclopedia article about telephone
The telephone lines used include the ordinary open wire lines, lead-sheathed cables coaxial cable, which is virtually immune to external interference, consists of two concentric conductors separated by an insulator; the current in the inner conductor draws the current in the outer conductor toward the center rather than letting it dissipate outwards.
Cellular telephone cellular telephone or cellular radio, telecommunications system in which a portable or mobile radio transmitter and receiver, or "telephone," is linked via microwave radio frequencies to base transmitter and receiver stations that connect the user to a conventional telephone network.
Telephone companies have explored partnerships with media conglomerates for integrating access to cable television, fiber optics fiber optics, transmission of digitized messages or information by light pulses along hair-thin glass fibers.
http://columbia.thefreedictionary.com/telephone   (1481 words)

  
 Central office - Wikipedia, the free encyclopedia
See nonblocking minimal spanning switch for a discussion of Charles Clos's algorithm, used in many telephone switches, and arguably one of the most important algorithms in modern industry.
A telephone switch is the brains of an exchange.
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.
http://en.wikipedia.org/wiki/Telephone_switch   (3020 words)

  
 Telephone exchange - Wikipedia, the free encyclopedia
A telephone switch is the brains of an exchange.
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.
The local exchange automatically senses an off hook (tip) telephone condition, provides dial tone to that phone, receives the pulses or DTMF tones generated by the phone, and then completes a connection to the called phone within the same exchange or to another distant exchange.
http://en.wikipedia.org/wiki/Telephone_exchange   (3020 words)

  
 Nightwork: Hackito Ergo Sum, Hack, Hacker, Hacking - What Matters
Hacking denotes nondestructive mischief while cracking describes activities such as unleashing a computer virus, breaking into a computer, or destroying data.
The word hack found its way into common usage outside MIT with the advent of computer hacking in the early sixties.
In the eighties, experts in the computer field made a distinction between hacking and cracking.
http://alum.mit.edu/ne/whatmatters/200304/hack.html   (3020 words)

  
 How a Computer Sleuth Traced a Digital Trail
Shimomura's monitoring efforts enabled investigators to watch as the intruder commandeered telephone company switching centers, stole computer files from Motorola, Apple Computer and other companies, and copied 20,000 credit-card account numbers from a commercial computer network used by some of the computer world's wealthiest and technically savviest people.
Over the next 48 hours, as the FBI sent in a surveillance team from Quantico, Va., obtained warrants and prepared for an arrest, cellular telephone technicians from Sprint Corp. monitored the electronic activities of the man they believed to be Mitnick.
Hacking into the long-distance network, the intruder was connecting a computer to various dial-in sites to elude detection.
http://partners.nytimes.com/library/cyber/week/mitnick2.html   (3020 words)

  
 Entropy Gradient Reversals - The Rise of the Stupid Network
Telephone networks have been designed for optimal use of scarce resources.
Telephone companies could do it too, but it is unlikely as long as their senior managers prefer to talk with lawyers, regulators, consultants and financiers more than with experts in their own employ.
Many are also hobbled by less conscious telephone company mental models of "communications," "technology," and "customer needs." While these people may realize that the old ways are becoming obsolete, they live in a world conditioned by an encompassing, arcane legacy that only remembers "rational," incremental change.
http://www.rageboy.com/stupidnet.html   (3722 words)

  
 Mobile phone - Wikipedia, the free encyclopedia
A mobile phone, also known as a cellphone, mobile, handphone or cellular phone, is a portable electronic device which behaves as a normal telephone whilst being able to move over a wide area (compare cordless phone which acts as a telephone only within a limited range).
Mobile phones allow connections to be made to the telephone network, normally by directly dialing the other party's number on an inbuilt keypad.
Mobile phones must be connected to the system of land-line phones.
http://en.wikipedia.org/wiki/Mobile_telephone   (3287 words)

  
 Telephone tapping - Wikipedia, the free encyclopedia
The telephone tap or wire tap received its name because historically, the monitoring connection was applied to the wires of the telephone line of the person who was being monitored and drew off or tapped a small amount of the electrical signal carrying the conversation.
If the tap is implemented at a digital switch, the switching computer simply copies the digitized bits that represent the phone conversation to a second line and it is impossible to tell whether a line is being tapped.
A more modern alternative is to use telephone recording devices connected to computers, such as PhoneValet Message Center.
http://en.wikipedia.org/wiki/Telephone_tapping   (2448 words)

  
 Telephone World - Modern North American Local Central Offices
This increases the amount of switching "lines" and can do it more efficiently than traditional switching systems since all the switching is done on a "virtual" scale in software rather than in hardware.
The first "electronic" switch that was used in the public telephone network was an experimental switch in Morris, IL in 1960.
This switch, known as the Number 5 Electronic Switching System or "#5ESS" for short, is a fully digital switch that did everything the #1ESS family of computer controlled analog switches did and more.
http://www.dmine.com/phworld/network/moffice.htm   (1680 words)

  
 COMPUTER TELEPHONE INTERFACE
The final outcome of this project, which I would like to refer to as the Computer Telephone Interface (C.T.I.), is a means of simplifying the interface between a host computer and an ordinary telephone set.
The Telephone Adapter which consists of a speaker, a microphone and a relay is connected to J2 of the D.A.S. Only six conductors are required to allow for full use of the telephone adapter.
The fact that ordinary Touch-Tone telephone sets are in common use all around the U.S. and that they are capable of functioning as limited computer terminals, make the implementation of a system that allows for a telephone set to become a computer terminal very attractive.
http://www.vorde.org/voiceProcessing/mb-cti-thesis/main.html   (9474 words)

  
 Telephone Company Operator Services Applications - Fifth Generation Computer Corporation
Printed telephone directories for operators were replaced by computer systems in the 70's.
Telephone Operator Services is a department within telephone companies that provides information requested by individual users as needed to make telephone calls.
Although the callers' Telephone Directory has instructions for reaching the appropriate DA Bureau, they may not remember how to do it, or the directory may not be immediately available when using a coin operated, car, or cellular phone.
http://www.fifthgen.com/tcosa.htm   (441 words)

  
 That's a Switch!
A telephone switch is essentially a computer designed to route and connect calls.
Since the government has switches from many different companies, there was no way to centralize telephone switch management to determine where the waste areas were.
The object of the Pensacola prototype is to prove multiple telephone switches can be managed from one central region and that those switches can be taken care of with a minimal number of people physically stationed at the site.
http://www.chips.navy.mil/archives/94_oct/file9.html   (1507 words)

  
 Binagrip paper / Forrest
This input method is further enhanced by using a technique for creating macro binagrams that are used for such tasks as speed dialing a telephone or word input.
The telephone number is then dialed by viewing the virtual telephone and pressing the spatially corresponding key switches on the actual keypad - the upper left key switch of the virtual telephone corresponds to the upper left switch of the actual keypad and so on.
The binagrip's telephone keypad is split into two parts with eight key switches on the user's left and the remaining four key switches on the right.
http://www.cyberedge.com/info_r_a+p04_wright.html   (2045 words)

  
 hacker11.txt
Given the nature of hacking, it is not surprising that some of the earliest japes occurred on computers owned by universities.
In a typical hack, you may have only vague information about the target computer, and much of the fun is seeing how quickly you can work out what the remote computer wants to 'see' - and how to make your machine respond.
The pleasures of hacking are possible at almost any level of computer competence beyond rank beginner and with quite minimal equipment.
http://gortaran.tripod.com/hacker11.txt   (2045 words)

  
 Telephone Switch Upgrade Brings New Services (insITes August 2005)
It runs specialized software to handle telephone switching and other services, but those are just computer programs like any others.
In the telephone system we replaced two years ago, the computer was a very specialized one.
Few people on campus realize that when they pick up the telephone to make or receive a call, the telephone “switch” that manages the call connections is actually a computer.
http://www.sandiego.edu/insites/article.php?story=20050728144223310   (287 words)

  
 csl92-03.txt
A secure telephone terminal is a device that connects to a telephone line or a cellular telephone system and provides a variety of security services to the conversation or information being transmitted.
Modern telephone terminals and transmission facilities use digital technology which utilizes a sequence of the binary digits 0 and 1 to represent computer data, human speech, or fax pictures.
Secure telephone terminals are becoming more widely available for the protection of both classified and unclassified voice, data, and facsimile (fax) communications (most modern secure telephones have a data port for connecting to computers or fax machines).
http://csrc.nist.gov/publications/nistbul/csl92-03.txt   (2370 words)

  
 Apprehending The Computer Hacker:
For instance, the hacker would call a telephone company employee telling her that he is a line worker atop a telephone pole who is unable to access the system for test purposes.
They were able to obtain so much information about telephone company computers that many of them knew more about these computers than telephone company professionals.
This enabled someone to hack a network server computer by pretending that he was operating from a "trusted" computer.
http://www.shk-dplc.com/cfo/articles/hack.htm   (2370 words)

  
 Computer and telephone apparatus with user friendly computer interface and enhanced integrity features - Patent 4991199
The non-writable memory includes an interpreter for the program used with the microprocessor, certain elements for the program's telephone interface features and the required software for start-up of the program.
The interface is operated through the telephone unit using primarily the 12-key keypad of the telephone and one of the function keys on the telephone housing.
The telephone elements of the device are operated from a conventional 12-key telephone keypad through the telephone electronics of the device and perform normal telephone functions.
http://www.freepatentsonline.com/4991199.html   (4467 words)

  
 Xerox - USA - XSIS: Telephone Companies
Advertisers generally would rather have telephone books distributed in a timely fashion, with only black text and graphics, than to have full-color books distributed many weeks later.
For reprints and short run telephone books, faster turnaround time and cost savings are sufficient reasons to implement a Print-on-Demand solution that is based on high speed, reliable Xerox printers adapted for lightweight paper.
Telephone books are printed on lightweight paper (including white pages, yellow pages, and street directories) whether they are intended for residential use or business-to-business customers.
http://www.xerox.com/Static_HTML/xsis/apbrtele.htm   (660 words)

  
 67933.991229&ELEMENT_SET=DECL
Therefore, if the dialed telephone number is among the numbers that cannot be reached by the private telephone network operator, control is transferred to the telephone dialer 6, which dials the number and is connected to the telephone line 7 of the national telephone network.
The national telephone network 7 is connected to the nearest exchange of the operator, designated by the reference numeral 25, and during this step the telephone line and the operator exchange communicate with each other.
The activity of the telephone signal analysis means 30 occurs also in the absence of a telephone call, since said means are meant to detect whether the signal is present or not on the telephone line.
http://www.wipo.int/cgi-pct/guest/getbykey5?KEY=99/67933.991229&ELEMENT_SET=DECL   (3062 words)

  
 Call Accounting Software, Telemanagement, Telephone Reporting
Call Accounting Software is for analyzing all of your telephone activity.
Call accounting is the single best way to increasing productivity and lowering telephone operating costs.
Call accounting by Tapit is a Windows based software program that collects, analyzes, and reports on calling activities.
http://www.callaccounting.org   (745 words)

  
 610 (telephone) - encyclopedia article about 610 (telephone).
In locations where telephone and computer data access points are shared with a common patch panel, an RJ-45 wall socket is used with a RJ-11/RJ-45 adapter.
Most telephones operate through transmission of electric signals over a complex telephone network which allows almost any phone user to communicate with almost any other.
RJ-11 (or RJ11) is a physical interface often used for terminating telephone wires.
http://encyclopedia.thefreedictionary.com/610+(telephone)   (521 words)

  
 Telephone directory - Wikipedia, the free encyclopedia
Telephone directories can be published in hard copy or in electronic form.
In the latter case, the directory can be provided as an online service through proprietary terminals or over the Internet, or on physical media like CD-ROM.
Printed reverse directories have become less common with the availability of telephone databases on CD-ROM and on the Internet with advanced searching features.
http://en.wikipedia.org/wiki/Telephone_directory   (967 words)

  
 Cable Modem
Unlike circuit-switched telephone networks where a caller is allocated a dedicated connection, cable modem users do not occupy a fixed amount of bandwidth during their online session.
The cable industry has now added an option to the line that runs to your home and SOHO business (for audio/video output) to include the ability of input/output for data transmission for computer usage including Internet access.
The uploading of information to the computer will be through the analog line, while the downloading of information will be through the cable line [3].
http://misnt.indstate.edu/harper/CableMo.htm   (967 words)

  
 UK TELEPHONE HISTORY
A telephone conversation by wireless radio was exchanged on 19 August between Sir Samuel Instone of the Instone Air Line from a private residence in London to an aeroplane in flight to Paris.
Telephone Managers, with Head Postmasters acting as their agents on certain matters, were to be responsible for the day-to-day control of all aspects of the telephone service (engineering, traffic, sales and accounts).
The London-Paris telephone service, inaugurated in April of this year, was controlled and worked from the Central Telegraph Office until transferred to the Central telephone exchange in GPO South, Carter Lane in February 1904.
http://web.ukonline.co.uk/freshwater/histuk.htm   (967 words)

  
 An Investigation of the Safety Implications of Wireless Communications in Vehicles DOT TOC
Consumers might be given information on cellular telephone design features that may make them easier or harder to use.
While cellular telephones clearly have distraction potential, from many standpoints, such effects may be minimized if drivers are aware of the hazards, are judicious in their use of the technology, and if ergonomically sound cellular telephone designs are used.
States are encouraged to record the use of a cellular telephone during a crash as part of the normal crash investigation process.
http://www.nhtsa.dot.gov/people/injury/research/wireless   (7721 words)

  
 Telephone Operators
Employment of operators in telephone companies is expected to decline sharply through the year 2006 as automation continues to increase these workers' productivity, and deregulation increases competition for phone services from other industries.
The job of a telephone operator requires little physical exertion; during peak calling periods, however, the pace at the switchboard may be hectic.
Telephone company central office operators help customers with person-to-person or collect calls, or with special billing requests, such as charging a call to a third number or giving customers credit or a refund for a wrong number or a bad connection.
http://www.umsl.edu/services/govdocs/ooh9899/109.htm   (1634 words)

  
 Globalization Step-by-Step: Telephone Number
Once again, input fields and the routines that process information dealing with telephone numbers should be able to handle the variety of formats.
When designing and coding for display and storage of telephone numbers, do not assume one given format, but leave it very flexible.
The current implementation of NLS APIs and the.NET Framework do not provide any telephone-number formatting information.
http://www.microsoft.com/globaldev/getwr/steps/wrg_telnum.mspx   (212 words)

  
 Telephone Call Centers: The Factory Floors of the 21st Century - Knowledge@Wharton
Call Microsoft for help with Windows and you may have a long wait.
These workers range from telemarketers to catalogue order takers to tech support agents for computer and software users.
There also are examples of how the call center’s Big Brother system can backfire.
http://knowledge.wharton.upenn.edu/articles.cfm?catid=14&articleid=540&homepage=yes   (1708 words)

  
 Computer Terrorism: What are the risks ?
He diverted the telephone line of his victim to a telephone box in the small town of Paducah, and the line of the cabin towards to one of his telephones.
These test lines are characterized by the fact that each end has its own telephone number which is assigned to it and it's easy for two people, agreeing in advance on which line to use, to call each one one of the ends to be in contact for free.
Moreover, since the modern telephone exchanges are computers, the hacking of the telephone is very close to the hacking of a "traditional " computer.
http://www.iwar.org.uk/cyberterror/resources/risks/crime.html   (1708 words)

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