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- Vertical_service_code abstract "A vertical service code (VSC) is a special code dialed prior to (or instead of) a telephone number that engages some type of special telephone service or feature. Typically preceded with an asterisk, or * (star), key on the touch tone keypad and colloquially referred to as star codes, most are two digits in length; as more services are developed, those that use 2 or 3 as the first digit are sometimes three digits in length.In North American telephony, VSCs were developed by AT&T Corp. as Custom Local Area Signaling Services or CLASS codes (sometimes LASS) 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 the word "vertical" is a somewhat dated reference to older switching methods and the fact that these services can only be accessed by a local telephone subscriber, going up (or vertically) inside the local central office instead of out (or horizontally) to another telephone company.".
- Vertical_service_code wikiPageID "417914".
- Vertical_service_code wikiPageRevisionID "586016427".
- Vertical_service_code hasPhotoCollection Vertical_service_code.
- Vertical_service_code subject Category:Calling_features.
- Vertical_service_code subject Category:North_American_Numbering_Plan.
- Vertical_service_code subject Category:Telephone_numbers.
- Vertical_service_code subject Category:Telephone_numbers_in_Canada.
- Vertical_service_code subject Category:Telephone_numbers_in_the_United_States.
- Vertical_service_code type Abstraction100002137.
- Vertical_service_code type CallingFeatures.
- Vertical_service_code type Cognition100023271.
- Vertical_service_code type Communication100033020.
- Vertical_service_code type Concept105835747.
- Vertical_service_code type Content105809192.
- Vertical_service_code type Feature105849789.
- Vertical_service_code type Idea105833840.
- Vertical_service_code type PhoneNumber106426111.
- Vertical_service_code type Property105849040.
- Vertical_service_code type PsychologicalFeature100023100.
- Vertical_service_code type Signal106791372.
- Vertical_service_code type TelephoneNumbers.
- Vertical_service_code type TelephoneNumbersInCanada.
- Vertical_service_code type TelephoneNumbersInTheUnitedStates.
- Vertical_service_code comment "A vertical service code (VSC) is a special code dialed prior to (or instead of) a telephone number that engages some type of special telephone service or feature. Typically preceded with an asterisk, or * (star), key on the touch tone keypad and colloquially referred to as star codes, most are two digits in length; as more services are developed, those that use 2 or 3 as the first digit are sometimes three digits in length.In North American telephony, VSCs were developed by AT&T Corp.".
- Vertical_service_code label "Vertical service code".
- Vertical_service_code sameAs m.025_93.
- Vertical_service_code sameAs Q17112830.
- Vertical_service_code sameAs Q17112830.
- Vertical_service_code sameAs Vertical_service_code.
- Vertical_service_code wasDerivedFrom Vertical_service_code?oldid=586016427.
- Vertical_service_code isPrimaryTopicOf Vertical_service_code.