Draytek Vigor2710 Series User Manual page 251

Ring Port
Ring Pattern
Prefer Codec
Packet Size
Voice Active Detector
After finishing all the settings here, please click OK to save the configuration.
Time Out – Set the time out for the call forwarding. The
default setting is 30 sec.
Set Phone 1 and/or Phone 2 as the default ring port(s) for this
SIP account.
Choose a ring tone type for the VoIP phone call.
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.
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.
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. Click On to invoke this function; click off to
close the function.
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Vigor2710 Series User's Guide