Date: 2015-06-09 08:08:09Human communication Electromagnetism Technology Broadcast engineering Dual-tone multi-frequency signaling Electrical engineering Push-button telephone Telephony Signaling Multi-frequency signaling Electric motor Telephone | | ISSN No: International Journal & Magazine of Engineering, Technology, Management and Research A Peer Reviewed Open Access International JournalAdd to Reading ListSource URL: www.ijmetmr.comDownload Document from Source Website File Size: 787,58 KBShare Document on Facebook
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