NeoGate TG Series User Manual
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associated by the NAT with a particular local port. This
information is used to set up UDP communication between the
client and the VOIP provider and so establish a call.
External IP
Address
The IP address that will be associated with outbound SIP
messages if the system is in a NAT environment.
External Host
Alternatively you can specify an external host, and the system
will perform DNS queries periodically.
This setting is only required when your public IP address is not
static. It is recommended that a static public IP address is
used with this system. Please contact your ISP for more
information.
External
Refresh
Interval
Used to identify the local network using a network
number/subnet mask pair when the system is behind a NAT or
firewall.
Some examples of this are as follows:
“192.168.0.0/255.255.0.0”: All RFC 1918 addresses are local
networks;
“10.0.0.0/255.0.0.0”: Also RFC1918;
“172.16.0.0/12”:Another RFC1918 with CIDR notation;
“169.254.0.0/255.255.0.0”: Zero conf local network.
Please refer to RFC1918 for more information.
NAT Mode
Global NAT configuration for the system; the options for this
setting are as follows:
Yes = Use NAT. Ignore address information in the SIP/SDP
headers and reply to the sender's IP address/port.
No = Use NAT mode only according to RFC3581.
Never = Never attempt NAT mode or RFC3581 support.
Route = Use NAT but do not include rport in headers.
Allow RTP
Reinvite
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 for the system to negotiate endpoint-to-endpoint
media routing.
3) Codecs
We can choose the allowed codec in NeoGate TG, a codec is a compression or
decompression algorithm that used in the transmission of voice packets over a
network or the Internet. More information about codec, you can refer to this
page: http://en.wikipedia.org/wiki/List_of_codecs
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