Compex Technologies NetPassage 18A - Manual (Page 111)

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Static Address Translation
(Only supported by Wireless Routing Client and Gateway)
If you use a notebook for work at the office, it is probable that you also
bring it home to connect to the Internet and retrieve emails or surf the
web. Since it is most likely that your office’s and your home’s
broadband-sharing network subnets are differently configured, you
would have to struggle with reconfiguring your TCP/IP settings each
time you use the notebook in a different place. The access point
provides the Static Address Translation (SAT) feature to enable its users
to bypass this hassle.
Let's say that the IP address of your notebook is set to 203.120.12.47 at
the workplace but the access point that is connecting your home
network to the Internet, is using an IP address of 192.168.168.1. You have
enabled SAT on your router and want to access the Internet without
changing the IP address of the notebook, as you have to use it at work
again on the next day.
Since it is still set to the TCP/IP settings used in your office, the notebook
will then try to contact the IP address of your office's gateway to the
Internet. When the access point finds that the notebook is trying to
contact a device that lies in a different subnet from that of the home
network, it would then inform the notebook that the gateway to the
Internet is in fact itself (Access Point).
Once the notebook has been informed that the gateway to the Internet is the
access point, it will contact the latter (Access Point) to access the Internet,
without any change to its TCP/IP settings required.
NOTE
For SAT to function properly:
1. The IP address of the notebook should belong to a
different subnet from the LAN IP address of your
access point.
2. The in the TCP/IP settings of your
notebook should NOT be left blank.