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dtmf Setting
You can set the Out of Band DTMF and Send DTMF SIP Info Enable/Disable in this page. To change this
setting, please follow your VoIP Service Provider’s information. When you finished the setting, please click the
Submit button.
• RFC 2833: Click this button to send mid-call DTMF tones in RTP packets separately using RFC2833, i.e.,
dynamic negotiation of RTP payload for DTMF digits will be done.
• Inband DTMF (IN AUDIO): Click this button to send mid-call DTMF tones in RTP packets with the same
payload as voice, i.e., dynamic payload negotiation for DTMF digits will not be done.
• Send DTMF SIP Inf o: This field is configurable when RFC 2833 is selected as the DTMF relay
mechanism. Specify the payload number that needs to be used for DTMF information negotiated in
SDP during SIP signaling.
rPort function
You can enable or disable the RPort feature in this page. To change this setting, please follow the
recommendation of your VSP.
QoS
You can configure the Hold by RFC and Voice/SIP QoS in this page.
The QoS setting is to set the voice packets priority. If you set the value higher than 0, then the voice
packets will get the higher priority to the Internet. But the QoS function still needs to cooperate with the
others Internet devices.