ATCOM IP-04 User Manual page 27

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2) Set up the service provider and calling rule in IP04B to make it register to IP04A.
This method is almost the same as in Chapter 8.1 , EXCEPT you need to use the 202.8.16.98
as the service provider instead of 192.168.1.21.
3) Use the same method do port forwarding in routerB for IP04B. Your public address from
network provider maybe a dynamic ip which will be changed periodically. To overcome the
problem of dynamic ip, you may need to use the DDNS service , for more info please google
the internet.
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