Advanced > Voip > Telephony - D-Link DVG-2001S Manual

The VoIP Terminal Adapter
can be configured to handle
voice signals over the Internet
Protocol (Voice Over IP −
VOIP).
DTMF Method
Payload Type
VAD
Advanced > VOIP > Telephony
Out-of band Dual
Multi-frequency (DTMF) mode sets how the router will handle the
tones that your telephone makes when you push its buttons. It is
recommended that you use the same mode that your VoIP service
provider uses. Select Enabled (RFC 2833) to send the DTMF tones
in RTP packets. Select Disabled (G.711) to include the DTMF tones
in the voice date stream. This method works best when you are using
a codec that does not use compression (like G.711).
The payload type (PT) field identifies the format of the RTP payload
and determines its interpretation by the receiving application
Voice Activity Detection (VAD) – Detects whether or not speech
is present. This lets the VoIP Terminal Adapter reduce the
bandwidth that a call uses by not transmitting "silent Packets" when
you are not speaking.
Tone Multi-frequency
17
– The Dual Tone