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Rupavahini news 8 Ada Derana Lunch Time News vimasuma shakthi mtv tamil news itn sirasa Breaking News 1st ITN Noon News Just In LUNCH TIME Today Puwath live English | Sri lanka rupavahini news 8, deran 12, live@12, vimasuma, shakthi tamil, mtv news, itn sirasa 6, csn Hiru TV, Breaking 1st, Lunch time, 10pm ITN Noon, News Just In
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Dual Tone Multi-Frequency (DTMF) is a method of instructing a telephone switching system to dial telephone numbers, or to issue commands to switching systems or related telephony equipment. It reliably sends the data across long distances. The DTMF system uses eight different frequency signals transmitted in pairs to represent sixteen different numbers, symbols and letters. Frequencies (of the generated'''....Read More
November 2, 2016 10:32 am