Yeastar Technology NeoGate TB400 User Manual page 32

Allow RTP Reinvite
3) Codec
We can choose the allowed codec in NeoGate TB400, a codec is a compression
or decompression algorithm that used in the transmission of voice packets over a
network or the Internet. For more information about codec, you can refer to this
page: http://en.wikipedia.org/wiki/List_of_codecs
Note: if you want to use codec G729, we recommend buying a license key and
input it here.
4) QoS
QoS (Quality of Service) is a major issue in VoIP implementations. The issue is
how to guarantee that packet traffic for a voice or other media connection will not
be delayed or dropped due interference from other lower priority traffic. When the
network capacity is insufficient, QoS could provide priority to users by setting the
value.
NeoGate TB400 User Manual
Never = Never attempt NAT mode or RFC3581 support.
Route = Use NAT but do not include rport in headers.
By default, the system will route media steams from SIP
endpoints through itself. Enabling this option causes the
system to attempt to negotiate the endpoints to route
packets to each other directly, bypassing the system. It is
not always possible
endpoint-to-endpoint media routing.
Figure 4-13 Codec
Figure 4-14 QoS
for the system to negotiate
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