This is in contrast to out-of-band signaling which is sent over a different channel, or even over a separate network. In telecommunications, in-band signaling is the sending of control information within the same band or channel used for data such as voice or video. 12 What does DTMF mean as regards mobile phones?.10 How are DTMF tones removed from the RTP stream?.9 What’s the difference between DTMF and DMTF tones?.7 What does DTMF tones mean on a cell phone?. 1 What is in-band and out-of-band DTMF?.
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