Draytek Vigor2820 Series User Manual page 203

Volume Gain
MISC
DTMF
MSN Alias
Also, you can specify each field for your necessity. It is
recommended for you to use the default settings for VoIP
communication.
Mic Gain (1-10)/Speaker Gain (1-10) - Adjust the volume of
microphone and speaker by entering number from 1- 10. The
larger of the number, the louder the volume is.
Dial Tone Power Level - This setting is used to adjust the
loudness of the dial tone. The smaller the number is, the louder
the dial tone is. It is recommended for you to use the default
setting.
Ring Frequency - This setting is used to drive the frequency
of the ring tone. It is recommended for you to use the default
setting. Notice that such setting is not available for DECT
phone port.
DTMF Mode – There are four DTMF modes for you to
choose.
InBand - Choose this one then the Vigor will send the DTMF
tone as audio directly when you press the keypad on the
phone.
OutBand - Choose this one then the Vigor will capture the
keypad number you pressed and transform it to digital form
then send to the other side; the receiver will generate the tone
according to the digital form it receive. This function is very
useful when the network traffic congestion occurs and it still
can remain the accuracy of DTMF tone.
SIP INFO- Choose this one then the Vigor will capture the
DTMF tone and transfer it into SIP form. Then it will be sent
to the remote end with SIP message.
Payload Type (rfc2833) - Choose a number from 96 to 127,
the default value was 101. This setting is available for the
OutBand (RFC2833) mode.
You can modify the MSN number (default values are set from
30 – 39) with any number you desire. For example, type 50 in
the box of MSN 30.
Later you will find MSN 30 has been replaced with MSN50 in
all related pages. See the following figures for examples
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Vigor2820 Series User's Guide