TA1600/2400/3200 User Manual
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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) 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.
Figure 5-6 Qos
