PX0522
User Guide 1.0
Page 48 of 48
Step 2.
Set up the service provider and calling rule in PX0522-B to make it register to
PX0522-A. This method is almost the same as above, EXCEPT you need to use the
210.11.25.127 as the service provider instead of 192.168.1.21.
Step 3.
Use the same method do port forwarding in router-B for PX0522-B. 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.