Settings/user dtmf info/DESCRIPTION

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Some IVR systems may need DTMF events signalled via SIP INFO messages, this can be enabled here. Set it to <on> or <sip_info_only> to provide DTMF codes via SIP INFO messages. With <sip_info_only> the in band and out of band DTMF codes stop going in RTP as they are sent only through SIP INFO messages. Initially <on> was sending DTMF codes via SIP INFO messages only. This behaviour is now taken over in version 7.1.33 by the new option <sip_info_only> and <on> is additionally sending DTMF via RTP!
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