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Date: 2014-04-10 15:45:21Videotelephony Voice over IP Teleconferencing Audio codecs Softphone VoIP phone Dual-tone multi-frequency signaling Embedded system Videophone Technology Electronic engineering Electronics | unicoi_logo_white_no_shadow[removed])Add to Reading ListSource URL: www.unicoi.comDownload Document from Source WebsiteFile Size: 517,20 KBShare Document on Facebook |