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Is DTMF (Dual Tone Multi Frequency) Supported?

Two DTMF signaling methods (RFC2833 and SIP INFO) are supported. For more information, please refer to https://doc.didww.com/sip-general-info.html.

If you are unable to find a satisfactory answer to your question in this FAQ, please explore our DIDWW knowledgebase, or contact customer service at customer.care@didww.com.

For additional support options, see https://www.didww.com/Contacts/.