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  2. AT&T Ready to Fight for Sprint's Push-To-Talkers - AOL

    www.aol.com/news/2012-09-18-att-ready-to-fight...

    It seemed like a good idea at the time (2005). Sprint Nextel (NYS: S) -- just plain old Sprint at the time -- looked at the success Nextel was having with its unique push-to-talk iDEN network and ...

  3. Nextel - Wikipedia

    en.wikipedia.org/wiki/NEXTEL

    Nextel gained a significant marketing and technological advantage through its push-to-talk technology. In 2003, Verizon Wireless and Sprint PCS each launched push-to-talk features, with Cingular following in 2005. None have gained significant traction. Nextel and Verizon had entered a legal battle in June 2003 over Verizon's advertising for ...

  4. Push-to-talk - Wikipedia

    en.wikipedia.org/wiki/Push-to-talk

    A significant advantage of PTT is the ability for a single person to reach an active talk group with a single button press; users don't need to make several telephone calls to coordinate with a group. Push-to-talk cellular calls similarly provide half-duplex communications – while one person transmits, the other(s) receive. This combines the ...

  5. AT&T Mobility - Wikipedia

    en.wikipedia.org/wiki/AT&T_Mobility

    AT&T also offered Enhanced Push To Talk (PTT) services on smartphones. The original PTT service was sunset. The AT&T wireless data network began in 2002 as a Cingular initiative called "Project Genesis" that involved a GPRS overlay of the entire wireless network. Project Genesis was completed by the end of 2004.

  6. Sprint Extends Push-to-Talk Capabilities to More Phones ... - AOL

    www.aol.com/news/2012-10-24-sprint-extends-push...

    Sprint Direct Connect Now, based on Qualcomm Inc.'s proven push-to-talk technology platform, effectively extends Sprint's growing push-to-talk franchise - with more than 1 million Sprint Direct ...

  7. Sprint adds intrinsically-safe push-to-talk device to ... - AOL

    www.aol.com/2013/03/18/sprint-adds-intrinsically...

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  8. Duplex (telecommunications) - Wikipedia

    en.wikipedia.org/wiki/Duplex_(telecommunications)

    A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions. Duplex systems are employed in many communications networks, either to allow for simultaneous communication in both directions between two connected parties or to provide a reverse path for the monitoring and remote adjustment ...

  9. List of mobile virtual network operators in the United States

    en.wikipedia.org/wiki/List_of_mobile_virtual...

    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.

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