AddPac VoiceFinder AP200 User Manual page 86

VoiceFinder AP200 VoIP Residential Gateway (RGW) User's Guide Version 1.1
[NAT Glossaries]
Inside local address: The address set in the host of the inside network
Inside global address: An IP given by the Network Information Center (NIC)
or the service provider. There are more than one IP address representing
internal local IP addresses in the outside network.
Outside local address: The IP address of the host in the outside network.
The outside local address Appears in the inside network.
Outside global address: The address that the host owner gave to the host in
the outside network.
globally routable addresses or networks.
NAT supports static address translation and dynamic address translation.
Static Address Translation: When there is any access request from the
outside network, NAT regularly maps an unregistered IP address of the
internal host to a certified IP address, and converts the registered IP
addresses to an unregistered IP address. Also, if an internal host accesses
to the outside network, NAT performs the opposite and converts addresses.
Dynamic address Translation: NAT keeps registered IP addresses, and when
an inside network requests to access to the outside network, NAT allocates
one of IP addresses that it keeps. However, if all registered IP address that
NAT keeps are in use, NAT cannot allocate any registered IP address to the
inside network.
The VoiceFinder AP200 Gateway usually supports both of NAT function and Port
Address Translation (PAT) function.
NAT function converts several internal, unregistered IP addresses into several
external, registered IP addresses. And PAT function converts several internal,
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The outside global address is allocated to the
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