Busy line interrupt

Busy line interrupt

Busy line interrupt is a function on land line telephones that allows a caller to interrupt a phone conversation of another caller, [ [http://www.icc.illinois.gov/downloads/public/edocket/115077.pdf INWARD ASSISTANCE OPERATOR SERVICES] ] especially one who does not have call waiting.

Much like long distance calling before the late 90s, busy line interrupt is a service provided, for instance, to allow people to contact a family member in the event of an emergency if the receiving party's line is busy and the news cannot wait.

The service is not free. It is usually about $3 per use [ [http://www.coxbusiness.com/products/voice/basicpricing/clevelandpricing.html Cox Cleveland Pricing] ] and is charged whether or not the calling party can reach the person on the other end (as the phone just might be off the hook for privacy reasons or the line might be connected to the internet). For this reason, it is usually only used in cases of emergencies as noted above.

In the early 1990's, reports were surfacing that "phone phreakers" were having success in manipulating the line interruption function with signaling tones and equipment that emulated the telephone operator's. It was claimed to be possible to eavesdrop on any engaged telephone line by number.

References

External links

* [http://www.patentstorm.us/patents/7133515/description.html US Patent 7133515 - Subscriber control of busy line interrupt and line treatment codes]
* [http://www.cox.com/support/gainesvilleocala/telephone/operator-dirassist.asp Operator Services & Directory Assistance]
* [http://www.qwest.com/wholesale/pcat/opservixc.html Operator Services - Interexchange Carriers - V5.0]


Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Phreaking — is a slang term coined to describe the activity of a subculture of people who study, experiment with, or explore telecommunication systems, like equipment and systems connected to public telephone networks. The term phreak is a portmanteau of the …   Wikipedia

  • Call waiting — (or catch phone in Japan), in telephony, is a feature on some telephone networks. If a calling party places a call to a called party which is otherwise engaged, and the called party has the call waiting feature enabled, the called party is able… …   Wikipedia

  • Floppy disk controller — A floppy disk controller (FDC) is a special purpose chip and associated disk controller circuitry that directs and controls reading from and writing to a computer s floppy disk drive (FDD). This article contains concepts common to FDCs based on… …   Wikipedia

  • VMEbus — is a computer bus standard, originally developed for the Motorola 68000 line of CPUs, but later widely used for many applications and standardized by the IEC as ANSI/IEEE 1014 1987. It is physically based on Eurocard sizes, mechanicals and… …   Wikipedia

  • I²C — (Inter Integrated Circuit) is a multi master serial computer bus invented by Philips that is used to attach low speed peripherals to a motherboard, embedded system, or cellphone. The name is pronounced eye squared see or eye two see . As of… …   Wikipedia

  • Wikipedia:Featured article candidates — Here, we determine which articles are to be featured articles (FAs). FAs exemplify Wikipedia s very best work and satisfy the FA criteria. All editors are welcome to review nominations; please see the review FAQ. Before nominating an article,… …   Wikipedia

  • japan — japanner, n. /jeuh pan /, n., adj., v., japanned, japanning. n. 1. any of various hard, durable, black varnishes, originally from Japan, for coating wood, metal, or other surfaces. 2. work varnished and figured in the Japanese manner. 3. Japans,… …   Universalium

  • Japan — /jeuh pan /, n. 1. a constitutional monarchy on a chain of islands off the E coast of Asia: main islands, Hokkaido, Honshu, Kyushu, and Shikoku. 125,716,637; 141,529 sq. mi. (366,560 sq. km). Cap.: Tokyo. Japanese, Nihon, Nippon. 2. Sea of, the… …   Universalium

  • Universal asynchronous receiver/transmitter — A universal asynchronous receiver/transmitter (usually abbreviated UART and pronEng|ˈjuːɑrt) is a type of asynchronous receiver/transmitter , a piece of computer hardware that translates data between parallel and serial forms. UARTs are commonly… …   Wikipedia

  • Traffic light — The traffic light, also known as traffic signal, stop light, traffic lamp, stop and go lights, robot or semaphore, is a signaling device positioned at a road intersection, pedestrian crossing, or other location. Its purpose is to indicate, using… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”