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2. Time-division multiple access - Wikipedia

   en.wikipedia.org/wiki/Time-division_multiple_access

   Most 2G cellular systems, with the notable exception of IS-95, are based on TDMA. GSM, D-AMPS, PDC, iDEN, and PHS are examples of TDMA cellular systems.. In the GSM system, the synchronization of the mobile phones is achieved by sending timing advance commands from the base station which instruct the mobile phone to transmit earlier and by how much.

3. Synchronization in telecommunications - Wikipedia

   en.wikipedia.org/wiki/Synchronization_in...

   Telecommunication networks rely on the use of highly accurate primary reference clocks which are distributed network-wide using synchronization links and synchronization supply units. Ideally, clocks in a telecommunications network are synchronous, controlled to run at identical rates, or at the same mean rate with a fixed relative phase ...

4. 5G - Wikipedia

   en.wikipedia.org/wiki/5G

   An Android phone, showing that it is connected to a 5G network An Apple iPhone showing that it is connected to a 5G Network. In telecommunications, 5G is the fifth generation of cellular network technology, which mobile operators began deploying worldwide in 2019 as the successor to 4G. 5G is based on standards defined by the International Telecommunication Union under the IMT-2020 ...

5. Code-division multiple access - Wikipedia

   en.wikipedia.org/wiki/Code-division_multiple_access

   In 1958, Kupriyanovich made the new experimental "pocket" model of mobile phone. This phone weighed 0.5 kg. To serve more customers, Kupriyanovich proposed the device, which he called "correlator." [11] [12] In 1958, the USSR also started the development of the "Altai" national civil mobile phone service for cars, based on the Soviet MRT-1327 ...

6. Holdover in synchronization applications - Wikipedia

   en.wikipedia.org/wiki/Holdover_in...

   Synchronization is as important as power at the cell site. [3] The quote above suggests that one can think of holdover in synchronization applications as analogous to running on backup power. Modern wireless communication systems require at least knowledge of frequency and often knowledge of phase as well in order to work correctly.

7. Fix issues syncing AOL accounts with older third-party Mail ...

   help.aol.com/articles/fix-issues-syncing-aol...

   If you're experiencing issues syncing your AOL account with older third-party mail apps like Kindle Fire's default mail app or the Mac OS mail app: