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Priority call, and priority ring also refer to calling features which give a distinctive ring to calls from telephone numbers chosen by the subscriber. The service may require a subscription from their telephone company. To set up priority call, the subscriber dials the vertical service code *61 and follows the instructions. [1] [2]
It was later bought by AT&T in 1995 and used by the pre-2004 "AT&T Wireless" after Cingular's purchase of AT&T Wireless in 2004 for $41 billion. [95] At that time, Cingular was jointly owned by SBC Communications (Southwestern Bell Corporation) of San Antonio, Texas, which owned 60 percent, and BellSouth of Atlanta, Georgia.
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 these services can only be accessed by a telephone subscriber, going up ( vertically ) inside the local central office ...
Distinctive ring, marketed under a variety of names, is a service offered by a telephone company that establishes additional telephone numbers on the same line as an existing number, each number ringing with a distinctive ringing pattern. Typically, the original number rings with the standard ring pattern that is common to the nation where the ...
Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.
AT&T: AT&T Mobility: Not operational: GSM 850 / GSM 1900 / UMTS 850 / UMTS 1900: Former AT&T Wireless Services, [84] then Cingular Wireless (known as "Cingular Blue") [111] [14] 310: 390: Cellular One of East Texas: TX-11 Acquisition, LLC: Operational: GSM 850 / LTE 700 / CDMA: Former Yorkville Telephone Cooperative [84] [87] 310: 400: IT&E ...
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For cellular telephone users, a related capability is offered by the Nationwide Wireless Priority Service (WPS). WPS users have the ability to queue at the top for the next available communications channel to their registered base station in order to place their call by dialing * + 2 7 2 + [destination number] + send , greatly enhancing their ...
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