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A typical volume of Bell System Practices from the 1970s. The Bell System Practices (BSPs) is a compilation of technical publications which describes the best methods of engineering, constructing, installing, and maintaining the telephone plant of the Bell System under direction of AT&T and Bell Telephone Laboratories. [1]
Articles associated with AT&T Inc. or AT&T Corporation. Any article dealing with a company whose ownership was transferred to another company during the 1984 breakup of the Bell System should be placed under that current owner's category.
Acquired by Verizon Wireless and AT&T Mobility. [39] AT&T Wireless Services: GSM: EDGE: 22: October 2004: Acquired by Cingular Wireless, which later rebranded to AT&T Mobility. [40] Big Sky Mobile: GSM: EDGE: Unknown: 2017: Sold spectrum licenses to AT&T and T-Mobile and exited the business. [41] Blaze Wireless: GSM, UMTS: EDGE, HSPA+, LTE ...
A subscriber's VLR profile has a LAC(Location Area Code - Area server by cluster of BTS/cell sites) CID (Cell ID) as well as a list of allowed and disallowed services/features and other information. With the subscriber's VLR Profile the MSC can determine the last known LAC/CID for this subscriber and knows which BTS to use when it needs to ring ...
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The AT&T Wireless brand was retired by Cingular on April 26, 2005, six months after the close of the merger. This was per a pre-spinoff agreement with AT&T Corp. that stated that if AT&T Wireless was to be bought by a competitor, the rights to the name AT&T Wireless and the use of the AT&T name in wireless phone service would revert to AT&T Corp.
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