Specifications

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Figure 2-12 Inferface of system advanced configuraiton
Table 2-15 Parameters of system advanced configuration
Title Explanation
NAT
NAT traversal Gateways support several mechanisms for NAT traversal. Usually, static
NAT is used when fixed public IP address is available. It’s necessary to
perform port mapping or DMZ function on router when choosing
dynamic or static NAT.
Refresh period The refresh time must be filled in here when choosing dynamic NAT or
STUN traversal. Besides, refresh time interval shall be determined by
giving consideration into the NAT refresh time of the LAN router which
the gateway is located. Gateway’s NAT holding function and STUN
function will carry out periodically operation accoding to this parameter.
With second as its unit, default value of 60 seconds.
SDP Address
This parameter determines the IP address used in transmitted SDP.
l NAT IP Address: Apply NAT address into the transmitted SDP;
l Local IP Address: Apply the gateway’s IP address into the transmitted
SDP.
Note: The parameter should come into effect only on condition that
gateway successfully obtained NAT address.