Draytek Vigor2925 Series User Manual page 447

Volume Gain
MISC
DTMF
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.
Call Waiting Tone Power Level - This setting is used to
adjust the loudness of the call waiting tone. The smaller the
number is, the louder the tone is. It is recommended for you
to use the default setting.
Interdigit Timeout – Type a value in this field to specify
time limit for interdidig.
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) - Type a number from 96 to 127,
the default value was 101. This setting is available for the
OutBand (RFC2833) mode.
Replace + digit in caller ID to – For international phone
call, the phone number could add a '+' sign, for example,
+8865972727. However, the caller ID (DTMF type
especially) can not display '+' at all.
Therefore, this function can be enabled to give another
number to replace the plus sign, for example, "+" can be
replaced by "00". Then the above phone number will become
008865972727. When the callee receives such number, he
can use re-dial function to dial back to the caller.
431
Vigor2925 Series User's Guide