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Multi-frequency signaling
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171	PDF Document Add to Reading List Source URL: docstore.mik.ua Language: English - Date: 2002-09-28 23:19:09 Ringback tone Call-progress tone Signal tone Disconnect tone Special information tones Reorder tone Technology Engineering Language DBm Dual-tone multi-frequency signaling Dial tone
172	PDF Document Add to Reading List Source URL: www.historyofphonephreaking.org Language: English - Date: 2008-08-21 12:13:25 Panel switch Dual-tone multi-frequency signaling Direct distance dialing Signalling System No. 7 Multi-frequency signaling Single-frequency signaling Number Five Crossbar Switching System Rotary dial Telephone Telephony Telephone exchanges Signaling
173	PDF Document Add to Reading List Source URL: www.historyofphonephreaking.org Language: English - Date: 2008-08-21 12:12:51 Telephony Signaling Single-frequency signaling Telephone exchange Signal tone Telephone Multi-frequency signaling Signalling System No. 7 Relay Electronic engineering Technology Electromagnetism
174	PDF Document Add to Reading List Source URL: focus.ti.com Language: English Goertzel algorithm Blue box Telephone keypad Harmonic Dial tone Radio technology Selective calling Electronic engineering Broadcast engineering Dual-tone multi-frequency signaling
175	PDF Document Add to Reading List Source URL: dougkerr.net Language: English - Date: 2013-07-22 19:24:27 Computer art Telephone exchange ASCII Dual-tone multi-frequency signaling Bell System Telephone Rotary dial Pulse dialing Bell Labs Telephony AT&T ASCII art
176	PDF Document Add to Reading List Source URL: focus.ti.com Language: English Electronics Broadcast engineering Dual-tone multi-frequency signaling Goertzel algorithm Signaling Telephone keypad Frequency Electronic filter Discrete Fourier transform Electronic engineering Digital signal processing Mathematical analysis
177	PDF Document Add to Reading List Source URL: focus.ti.com Language: English Digital signal processing Companies listed on the New York Stock Exchange Texas Instruments Dual-tone multi-frequency signaling Technology Digital signal processors Electronic engineering Electronics

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