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Stockphotos.ro (c) 2025. All stock photos are provided by Dreamstime and are copyrighted by their respective owners.
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| navigate by keyword : band call center communicate communication computer connection corporate customer data device dial digital dtmf dual dualtone equipment frequency industry internal keypad landline lines mobile multifrecuency multifrequency network office operator phone pushbutton rotary service signal signaling switch switching system tech technology telecommunication telephone telephonist tone user voice voicefrecuency workplace |
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| DTMF Dual-Tone Multifrequency Written on Green Key of Metallic Keyboard. Finger pressing key |
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Stockphotos.ro (c) 2025. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
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