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Date: 2013-07-19 11:39:52Software-defined radio Mobile telecommunications Videotelephony Wireless networking Push-to-talk Embedded systems AT&T Mobility 4G 3GPP Long Term Evolution Technology Mobile technology Electronic engineering | The fast track to productivity AT&T Enhanced Push-to-Talk ServiceAdd to Reading ListSource URL: www.corp.att.comDownload Document from Source WebsiteFile Size: 1,38 MBShare Document on Facebook |