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DVA-G3340S User Manual Page 47 of 94 V1.00 AU
The table below describes the VOIP Telephony settings.
VOIP Telephony Parameters Description
Index
Index allows you to select the current port you want
to configure. This directly relates to the FXS1 or
FXS2 ports on the back of the unit.
EC
Echo Cancellation (EC) – G.168 is an ITU standard
for eliminating echo. Select Enabled to cancel the
echo caused by the sound of your voice
reverberating in the telephone receiver when you
speak.
VAD
Voice Activity Detection (VAD) – detects whether or
not speech is present. This lets the router reduce
the bandwidth that a call uses by not transmitting
“silent Packets” when you are not speaking.
OOB DTMF
Out-of band Dual Tone Multi-frequency – The Dual
Tone 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 data stream. This method
works best when you are using a codec that does
not use compression (like G.711).
Payload Type
A Payload Type is a number from 96 through 127
that identifies the type of payload carried in the
packet. For example, a payload type of 122 denotes
a fax payload. This field is only active when the
DTMF method is set to RFC 2833.
RX Gain
Allows you to control the decibel rating of the
incoming data.
TX Gain
Allows you to control the decibel rating of the
outgoing data.
Inter-Digit Timer
Determines the amount of time that will elapse
between sending dialled digits when making a VoIP
telephone call.
Codec Priority & Packet
Interval
Allows you to configure the order in which the
codec’s will be used to establish and maintain a call.
It is recommended to leave these in their default
state unless required to change via VoIP Service
Provider. The Packet Interval is used to specify the
size of the packet used for the VoIP traffic while
used in conjunction with the specific codec. It is not
recommended that you change this unless specified
via your VoIP Service Provider.