Dial Tone First payphone

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• DTF — • Dial Tone First payphone Telefonie • Data Transfer Facility • Distributed Test Facility • Demonstration Test Flight NASA …   Acronyms

• Dual-tone multi-frequency — (DTMF) signaling is used for telephone signaling over the line in the voice frequency band to the call switching center. The version of DTMF used for telephone tone dialing is known by the trademarked term Touch Tone (canceled March 13, 1984),… …   Wikipedia

• DTF — [1] Dial Tone First payphone {Telefonie} [2] Data Transfer Facility [3] Distributed Test Facility [4] Demonstration Test Flight ( > NASA Acronym List ) …   Acronyms von A bis Z

• DTF — abbr. Dial Tone First payphone [Telephony] …   Dictionary of abbreviations

• DTF — comp. abbr. Definite Tape File comp. abbr. Distributed Test Facility acronym Dial Tone First payphone (Telephony) …   United dictionary of abbreviations and acronyms

• TXE — TXE, which stands for Telephone eXchange Electronic, was the designation given to a family of telephone exchanges developed by the British General Post Office (GPO), now BT, designed to replace the ageing Strowger systems. When World War II ended …   Wikipedia

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• Panel switch — The panel switching system was an early type of automatic telephone exchange, first put into urban service by the Bell System in the 1920s and removed during the 1970s. The Panel and Rotary systems were developed in parallel by Bell Labs before… …   Wikipedia

• Phone fraud — Whether in the form of the consumer attempting to defraud the telephone company, the telephone company attempting to defraud the consumer, or a third party attempting to defraud either of them, fraud has been a part of the telephone system almost …   Wikipedia

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