![]() Inband tone generation, usually known as "inband." Using this method, the audible tones are generated just like speech. ![]() Almost 100% of VoIP carriers support and prefer this method. RFC2833 (recommended!), the time-tested and IETF-approved RTP DTMF signaling method. With VoIP, DTMF is delivered using one (or more) of the following methods: This is useful for audio navigation of menu systems, IVRs, and phone trees. ![]() Modified on: Fri, 27 Jul, 2018 at 7:42 PMÄTMF allows key-presses on inbound and outbound calls to be recognized by a phone system capable of decoding and registering these tones. Solution home FAQs Support FAQs Dual-tone multi-frequency (DTMF), or TouchTones ![]()
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