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DTMF Signaling
Method
Select the signaling method for transmitting DTFM tones, either via
RTP (RFC2833) or SIP INFO messages. The default is RTP.
Transport
Use the web interface’s Transport page to manage transport and Network Address
Translation (NAT) settings, and to enable or disable Quality of Service (QoS). The
illustration below shows the Transport page. After changing any of these settings, the
phone must be restarted for the changes to take effect.