Draytek VigorIPPBX 3510 User Manual page 227

Outgoing Call Use
Answer Mode
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.
There are several outside lines (SIP accounts) for you to
specify for such extension. Please check the one(s) you want.
The available boxes listed here will be changed according to
the FXS/FXO module inserted to VigorIPPBX 3510.
Specify the way to process incoming phone calls.
No answer after ..... – When the incoming phone call is not
picked up, it will be processed by keeping, forwarding to
certain extension. Please specify the waiting time and
determine the way you want to process.
Busy then – When this extension number is busy, you can
forward the incoming phone call to other extension number.
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VigorIPPBX 3510 Series User's Guide