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Vertical Service Codes
A vertical service code (VSC) is a sequence of digits and the signals star () and pound/hash () dialed on a telephone keypad or rotary dial to access certain telephone service features. Some vertical service codes require dialing of a telephone number after the code sequence. On a touch tone telephone, the codes are usually initiated with the star key, resulting in the commonly used name ''star codes''. On rotary dial telephones, the star is replaced by dialing ''11''. In North American telephony, VSCs were developed by the American Telephone and Telegraph Company (AT&T) as Custom Local Area Signaling Services (CLASS or LASS) codes in the 1960s and 70s. Their use became ubiquitous throughout the 1990s and eventually became a recognized standard. As ''CLASS'' was an AT&T trademark, the term ''vertical service code'' was adopted by the North American Numbering Plan Administration. The use of ''vertical'' is a somewhat dated reference to older switching methods and the fact that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asterisk
The asterisk ( ), from Late Latin , from Ancient Greek , , "little star", is a Typography, typographical symbol. It is so called because it resembles a conventional image of a star (heraldry), heraldic star. Computer scientists and Mathematician, mathematicians often vocalize it as star (as, for example, in ''the A* search algorithm'' or ''C*-algebra''). An asterisk is usually five- or six-pointed in printing, print and six- or eight-pointed when handwritten, though more complex forms exist. Its most common use is to call out a footnote. It is also often used to censor offensive words. In computer science, the asterisk is commonly used as a wildcard character, or to denote pointer (computer programming), pointers, repetition, or multiplication. History The asterisk was already in use as a symbol in ice age Cave painting, cave paintings. There is also a two-thousand-year-old character used by Aristarchus of Samothrace called the , , which he used when proofreading Homeri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Call Forwarding
Call forwarding, or call diversion, is a telephony feature of all telephone switching systems which redirects a telephone call to another destination, which may be, for example, a mobile or another telephone number where the desired called party is available. Call forwarding was invented by Ernest J. Bonanno. In North America, the forwarded line usually rings once to remind the customer using call forwarding that the call is being redirected. More consistently, the forwarded line indicates its condition by stutter dial tone. Call forwarding typically can redirect incoming calls to any other domestic telephone number, but the owner of the forwarded line must pay any toll charges for forwarded calls. Call forwarding is often enabled by dialing *72 followed by the telephone number to which calls should be forwarded. Once someone answers, call forwarding is in effect. If no one answers or the line is busy, the dialing sequence must be repeated to effect call forwarding. Call forwar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AT&T Corp
AT&T Inc., an abbreviation for its predecessor's former name, the American Telephone and Telegraph Company, is an American multinational telecommunications holding company headquartered at Whitacre Tower in Downtown Dallas, Texas. It is the world's third largest telecommunications company by revenue and the third largest wireless carrier in the United States behind T-Mobile and Verizon. As of 2023, AT&T was ranked 32nd on the ''Fortune'' 500 rankings of the largest United States corporations, with revenues of $122.4 billion. The modern company to bear the AT&T name began its history as the American District Telegraph Company, formed in St. Louis in 1878. After expanding services to Arkansas, Kansas, Oklahoma and Texas through a series of mergers, it became the Southwestern Bell Telephone Company in 1920. Southwestern Bell was a subsidiary of the original American Telephone & Telegraph Company, itself founded in 1885 as a subsidiary of the original Bell Telephone Company ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pat Fleet
Pat Trumble Fleet is an American voice actress. Widely recognized for the tens of thousands of recordings she has made for US telephone companies such as AT&T, Verizon, Qwest, the former Bell System companies, and others since 1981, she is still most recognized as the person who says "AT&T" in the company's sound trademark,Keppel, Bruce. "This Is the Voice of AT&T"'. ''Los Angeles Times''. July 20, 1989.United States Patent Office. "Trademark Document" U.S. Patent Office Sensory Mark Registration Number: 1573864'. AT&T Intellectual Property II, L.P., 1989. Trademark Record. U.S. Patent Office April 6, 1989. which played prior to any operator assisted or credit card paid call, and on answer when calling AT&T customer service numbers. She is also the voice for most "Vertical service code, star" services (e.g. last-call return, call blocking, etc.) for AT&T local telephone companies, and the voice heard when making AT&T handled calls through 1-800-CALL-ATT (225-5288) and through inter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nationwide Wireless Priority Service
The Nationwide Wireless Priority Service (WPS) is a system in the United States that allows high-priority emergency telephone calls to avoid congestion on wireless telephone networks. This complements the Government Emergency Telecommunications Service (GETS), which allows such calls to avoid congestion on landline networks. The service is overseen by the Federal Communications Commission and administered by the Office of Emergency Communications (OEC) in the Department of Homeland Security. WPS was previously administered by the National Communications System (NCS) which had been created by President Kennedy by a Presidential Memorandum on August 21, 1963, and expanded by President Reagan by Executive Order 12472 on April 3, 1984. On July 6, 2012, President Obama signed Executive Order 13618, which eliminated the NCS as a separate organization; it was merged into the Office of Emergency Communications (OEC), which had been created in 2007. A ceremony to retire the colors ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anonymous Call Rejection
In many voice telephone networks, anonymous call rejection (ACR) is a calling feature implemented in software on the network that automatically screens out calls from callers who have blocked their caller ID information. The caller usually hears a voice message explaining that their call cannot be connected unless they display their number. Or, some networks allow users to forward anonymous calls directly to voicemail. The service, together with caller ID, became possible with the introduction of digital switching technologies to landline telephone services, which became widespread in many countries throughout the 1980s and 1990s. In a classic digital PSTN network, it could be implemented directly in software running on local switching systems or, more commonly, as part of a suite of facilities supported by an additional layer known as the Intelligent Network (IN). This allowed more advanced, software based, services to be rolled out in public telephone networks using dedicated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cancel
Cancel, cancellation, or cancelled may refer to: Business *Project cancellation, in government and industry *Cancellation (mail), a postal marking applied to a stamp or stationery indicating the item has been used * Cancellation (insurance), the termination of an insurance policy * Flight cancellation and delay, not operating a scheduled flight Sociology *Cancel culture, boycotting and ostracism calling out offensive behavior on social media or in real life Technology and science *Cancel leaf, a bibliographic term for replaced leaves in printed books *Cancellation property, the mathematical property if ''a''×''b'' = ''a''×''c'' then ''b'' = ''c'' ** Cancelling out, a technique for simplifying mathematical expressions *Catastrophic cancellation, numerical error arising from subtracting approximations to nearby numbers * Noise cancellation, a method for reducing unwanted sound *Phase cancellation, the effect of two waves that are out of phase with each other being summed * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
All Calls
All or ALL may refer to: عرص Biology and medicine * Acute lymphoblastic leukemia, a cancer * Anterolateral ligament, a ligament in the knee * ''All.'', taxonomic author abbreviation for Carlo Allioni (1728–1804), Italian physician and professor of botany Language * All, an indefinite pronoun in English * All, one of the English determiners * Allar language of Kerala, India (ISO 639-3 code) * Allative case (abbreviated ALL) Music * All (band), an American punk rock band ** ''All'' (All album), 1999 * ''All'' (Descendents album) or the title song, 1987 * ''All'' (Horace Silver album) or the title song, 1972 * ''All'' (Yann Tiersen album), 2019 * "All" (song), by Patricia Bredin, representing the UK at Eurovision 1957 * " All (I Ever Want)", a song by Alexander Klaws, 2005 * "All", a song by Collective Soul from ''Hints Allegations and Things Left Unsaid'', 1994 Sports * All (tennis) * American Lacrosse League (1988) * Arena Lacrosse League, Canada * Australian Lacro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optus
Singtel Optus Pty Limited is an Australian Telecommunications in Australia, telecommunications company headquartered in Macquarie Park, a suburb in the Northern Sydney region of Sydney, New South Wales, Australia. It is a wholly owned subsidiary of Singaporean telecommunications company Singtel. Optus is the second-largest telecommunications company in Australia, with over 11 million customers as of 2023. Its mobile network covers 98.5% of the Australian population, with plans to cover 100% of Australia by 2025 through its partnership with SpaceX. History AUSSAT and deregulation (1981–1990) Optus can trace its beginnings back to the formation of the Government-owned AUSSAT Pty Limited in 1981. In 1982, Aussat selected the Hughes 376 for their initial satellites, with the first, AUSSAT A1, launched in August 1985. AUSSAT satellites were used for both military and civilian satellite communications, and delivering television services to remote outback communities. With Aussat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telstra
Telstra Group Limited is an Australian telecommunications company that builds and operates telecommunications networks and markets related products and services. It is a member of the S&P/ASX 20 stock index, and is Australia's largest telecommunications company by market share. Telstra has a long history in Australia, originating together with Australia Post as the Postmaster-General's Department upon Federation of Australia, federation in 1901. Telstra had transitioned from a state-owned enterprise to a fully Privatization, privatised company by 2006. History Australia's telecommunications services were originally controlled by the Postmaster-General's Department (PMG), formed in 1901 as a result of Australian Federation. Prior to 1901, telecommunications were administered by each colony. On 1 July 1975, separate commissions were established by statute to replace the PMG. Responsibility for postal services was transferred to the Australian Postal Commission (Australia Pos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
