Draytek VigorIPPBX 3510 Series, Руководство пользователя

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VigorIPPBX 3510 Series User’s Guide 111
DTMF 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.
Codec Prefer Codec - Select one of five codecs as the default for
your VoIP calls. The codec used for each call will be
negotiated with the peer party before each session, and so may
not be your default choice. The default codec is G.729A/B; it
occupies little bandwidth while maintaining good voice
quality.
If your upstream speed is only 64Kbps, do not use G.711
codec. It is better for you to have at least 256Kbps upstream if
you would like to use G.711.
Single Codec – If the box is checked, only the selected Codec
will be applied.
Code Rate – The amount of data contained in a single packet.
The default value is 20 ms, which means the data packet will
contain 20 ms voice information.
Codec VAD –
This function can detect if the voice on both
sides is active or not. If not, the router will do something to
save the bandwidth for other using. Check it to invoke this
function.
Allow to access these trunks There are several outside lines (SIP accounts) for you to
specify for such extension. Please check the one(s) you want.